Search found 68 matches

by 705121606
Thu Mar 12, 2020 6:53 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Lavelle's Review Slides
Replies: 1
Views: 20

Lavelle's Review Slides

On slide 5, we are told to calculate the partial pressure in bar so we use lnk=deltaG/-RT I understood what we were doing when we got k to equal 10. The next step was setting k to equal the concentrations of product over the concentration of reactants giving us 10=2x/x^2. How do we get x to equal 0....
by 705121606
Thu Mar 12, 2020 3:17 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: rates
Replies: 2
Views: 18

rates

Can someone explain the difference between rates and rate constants
by 705121606
Wed Mar 11, 2020 2:20 pm
Forum: Administrative Questions and Class Announcements
Topic: review session packets
Replies: 4
Views: 45

review session packets

Will the answers be posted for the worksheets and packets that we would've went over during the review session?
by 705121606
Tue Mar 10, 2020 5:08 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: delta g
Replies: 6
Views: 23

Re: delta g

would it be the same as long as it is standard conditions? at standard temperature?
by 705121606
Tue Mar 10, 2020 5:02 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: delta g
Replies: 6
Views: 23

delta g

how do we know when we should use products-reactants vs delta g= delta h - t delta s
by 705121606
Thu Mar 05, 2020 2:25 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: catalyst
Replies: 4
Views: 32

catalyst

How can we differentiate a catalyst and an intermediate in the reaction if they both cancel out and don't end up in the overall reaction?
by 705121606
Thu Mar 05, 2020 2:13 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: arrhenius equation
Replies: 1
Views: 33

arrhenius equation

Can someone break down the arrhenius equation for me?
I was trying to do section 7D of the kinetics hw and I'm confused on the different k values
by 705121606
Mon Mar 02, 2020 1:47 pm
Forum: Administrative Questions and Class Announcements
Topic: test 2
Replies: 3
Views: 30

test 2

just making sure for test two, in regards to outline four, we need to know Focus 5G3, 4, and 5J3 right
by 705121606
Sun Mar 01, 2020 1:00 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 6M.1: reading the cell diagram
Replies: 6
Views: 49

Re: 6M.1: reading the cell diagram

I also had trouble with this one, I read on another chemistry community question that when the ecell is negative we have to flip the cell around
by 705121606
Sat Feb 29, 2020 10:18 pm
Forum: Balancing Redox Reactions
Topic: balancing in basic solution 6k5 part d
Replies: 1
Views: 21

Re: balancing in basic solution 6k5 part d

I figured out what I did wrong if anyone else is also stuck:

to balance for acidic solutions:
12e- + 12H+ + P4 --> 4PH3
3(8H2O + P4 --> 4H2PO2- + 8H+ +4e-)
by 705121606
Sat Feb 29, 2020 7:13 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: 6.57
Replies: 3
Views: 43

Re: 6.57

You can relate E to Gnot using Gnot = -nFE. From there, relate Gnot to K using Gnot = -RT lnK. In this case, the reaction given makes K equal to Ka I solved up until K but didn't know how to get to Ka. In the solutions manual they took the square root of K to solve for Ka. Do you know why this is t...
by 705121606
Sat Feb 29, 2020 6:56 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 6O.1
Replies: 1
Views: 25

6O.1

In this question, it told us that a 1.0M NiSO4 (aq) solution was electrolyzed by using inert electrodes then asks for the cathode and anode reaction. I wrote the reaction for Ni2+ + 2e- --> Ni from the NiSO4 given in the equation but didn't know if that was the cathode or anode. Since this is saying...
by 705121606
Sat Feb 29, 2020 6:12 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 6l7
Replies: 1
Views: 19

6l7

When we make a cell diagram for cd(s) + 2Ni(OH)3 (s) --> Cd(OH)2 (s) + 2Ni(OH)s (s) at first I was confused on why the cell diagram would look like Cd|Cd(OH)2|KOH||Ni(OH)3|Ni(OH)2|Ni because I didn't know why we added the KOH but I was informed we needed it because since when we were balancing, we a...
by 705121606
Fri Feb 28, 2020 7:22 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 6m5a
Replies: 2
Views: 19

6m5a

When we write the cell diagram for the following reaction
2NO3- (aq) + 8H+(aq) + 6Hg(l) --> 3Hg2 2+ (aq) + 2NO(g) + 4H2O(l)

how come the diagram does not include a solid on the anode side?
Hg(l)|Hg2 2+ (aq)||No3-(aq)| H+(aq)|NO(g)|Pt(s)
by 705121606
Fri Feb 28, 2020 4:55 pm
Forum: Balancing Redox Reactions
Topic: balancing in basic solution 6k5 part d
Replies: 1
Views: 21

balancing in basic solution 6k5 part d

I learned that for basic solutions we can balance like a acidic solution and once we get our final result we would add the same number of hydroxides to the side with h+ to balance and create water then cancel out the waters on the other side. I didn't have trouble with this strategy but when I got t...
by 705121606
Fri Feb 28, 2020 2:24 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: HW question 5G.15
Replies: 4
Views: 44

Re: HW question 5G.15

Since you are given the k value and the partial pressures to find Q, you would use deltaG=-RTlnk + RTlnQ and this should give you the answers in joules
by 705121606
Fri Feb 28, 2020 1:50 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: how concentration affects cell potential
Replies: 2
Views: 34

how concentration affects cell potential

In the notes, we said that we could use le chatelier's principle in order to see how concentration affects cell potential. When the increase of a reactant was greater than 1.0m, then e cell> standard cell potential and when the increase of a product was greater than 1.0m, then e cell < standard cell...
by 705121606
Thu Feb 27, 2020 3:22 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: electrochemical series 6.45
Replies: 1
Views: 28

electrochemical series 6.45

We are given a list of metals and asked to order them starting with the most strongly reducing metal. I looked up the standard values in the appendix and this list was from most negative to most positive. Since these values correlate to the reduction potentials, why does a more negative value parall...
by 705121606
Thu Feb 27, 2020 1:51 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: 6n13
Replies: 2
Views: 27

6n13

For this one, I did get to the same step as the solutions manual than lnQ= 14.8 however I don't understand how they isolated Q to equal 10^6 because I got 2.6x10^6. Did anyone get the same answer or did I isolate the variable wrong
by 705121606
Thu Feb 27, 2020 12:56 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: 6N7
Replies: 1
Views: 16

6N7

For cells that have enot=0, how do we know which concentration goes on top and which goes on the bottom for the reaction quotient?
by 705121606
Thu Feb 27, 2020 12:29 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 6L.3d
Replies: 4
Views: 49

Re: 6L.3d

You would write the half-reaction without Pt(s), since it simply serves as a solid electrode for the cell diagram. Because a reduction reaction is occurring in the anode, there is a gain of electrons added to O2(g) as it also reacts with water, H2O(l) to produce hydroxide, OH-(aq). So the anode hal...
by 705121606
Thu Feb 27, 2020 12:27 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Midterm 3D
Replies: 4
Views: 46

Re: Midterm 3D

Julie_Reyes1B wrote:Because pH>pKa, the acid will mostly deprotonate. Since it deprotonates it will become the conjugate base, ChH3COO-. The conjugate base will have a net charge of -1.


so was this question asking the charge of the conjugate base?
by 705121606
Thu Feb 27, 2020 12:24 am
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: 6N1 part b
Replies: 1
Views: 30

6N1 part b

we are asked to calculate the equilibrium constants for the equation using lnk=nE/.02569. I don't understand why n in this case would be 2e- because then I don't believe the charges are balanced, can someone explain this to me
by 705121606
Wed Feb 26, 2020 10:24 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 6M5a
Replies: 1
Views: 33

6M5a

Once we determine that the reaction is spontaneous, we have to write a cell diagram for the reaction. In part a why is H+ included in this cell? I thought it was just used to balance the equation
by 705121606
Wed Feb 26, 2020 10:11 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Midterm 6B
Replies: 3
Views: 28

Midterm 6B

It asks for which process with delta H and delta G be expected to be most similar? I narrowed it down to either a or b during the test but then I got confused on the difference between them. The only thing I noticed was that option a was all in the solid state whereas option b had many different pha...
by 705121606
Wed Feb 26, 2020 10:08 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: midterm question// Concentration ratio [ENDORSED]
Replies: 9
Views: 140

Re: midterm question// Concentration ratio [ENDORSED]

What I did was I found Ka and used the pH given to find the concentration of H+. Since the equation for Ka is [H+][A-]/[HA], you can find the ratio of conjugate base to acid by dividing Ka by the concentration of H+. But how would you know if it stays as a salt in the stomach or becomes something e...
by 705121606
Wed Feb 26, 2020 10:02 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Midterm 3D
Replies: 4
Views: 46

Midterm 3D

For this question, it was asking what the net charge for acetic acid is when at ph 6 and pka 4.75. I was confused because I thought acids don't have charges. I wrote that the acid is neutral because when is dissociates wouldn't it become the conjugate base instead?
by 705121606
Wed Feb 26, 2020 9:59 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Midterm 3B
Replies: 1
Views: 41

Midterm 3B

I read on another post to look for the option that had the greatest number of moles, I was trying to do that on the test but i got similar numbers for many of the options which leads me to conclude I just calculated wrong. Could someone walk me through how they picked the correct answer
by 705121606
Wed Feb 26, 2020 8:51 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 6L5D
Replies: 1
Views: 32

6L5D

Can someone explain how we write the cell diagrams for this problem? I thought Au+ would be on both the anode and cathode side because each half reaction has that, instead they have Au(s) on both sides
by 705121606
Wed Feb 26, 2020 8:15 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 6L.3d
Replies: 4
Views: 49

6L.3d

For this part we are given the cell:
Pt(s)|O2(g)|H+(aq)|| OH-(aq)|O2(g)|Pt(s)

How are we supposed to write the half reaction for the anode?
In the solutions manual e=-.83

Why would it be negative if we are talking about a galvanic cell?
by 705121606
Mon Feb 24, 2020 4:52 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: cell potentials
Replies: 1
Views: 16

cell potentials

For galvanic cells it says we have to have a positive potential difference therefore we have to identify it as anode and cathode in the way that would make the cell potential positive. When would we do this instead of identifying the half reactions and determining if it is spontaneous through the si...
by 705121606
Mon Feb 24, 2020 3:45 pm
Forum: Administrative Questions and Class Announcements
Topic: midterm solutions
Replies: 4
Views: 69

midterm solutions

Are there solutions to the multiple choice portion of the midterm? I feel as those are more of the ones I struggled with so I would like to see how to solve those ones. Do we just have to go to office hours if we want to know the reasoning behind the answers?
by 705121606
Wed Feb 19, 2020 1:02 am
Forum: Gibbs Free Energy Concepts and Calculations
Topic: rxn gibbs free energy
Replies: 5
Views: 44

rxn gibbs free energy

How is the reaction gibbs free energy (calculated using delta g= -rtlnk = rtlnQ) different from the gibbs free energy we calculated last week?
And can someone explain why it would form products when positive and reactants when negative? Is it also spontaneous only if it is positive?
by 705121606
Mon Feb 17, 2020 1:11 pm
Forum: Balancing Redox Reactions
Topic: 6k3 part d
Replies: 4
Views: 36

6k3 part d

We are given the following reaction:
Cl2 (g) --> HClO (aq) + Cl2 (aq)

how come the half reaction with Cl2 is written as
Cl2 (g) + 2e- --> 2Cl-(aq)? if the reaction has Cl2 on both sides of the original equation
by 705121606
Wed Feb 12, 2020 1:15 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Analysis of Gibbs Free Energy Equation
Replies: 4
Views: 42

Re: Analysis of Gibbs Free Energy Equation

I believe it is all dependent on gibbs free energy because we need delta s and delta h to know if the reaction will be spontaneous or not. I would just make sure you know how to manipulate the variables and come to the conclusion of what needs to happen for the reaction to be spontaneous or non spon...
by 705121606
Wed Feb 12, 2020 1:11 pm
Forum: Third Law of Thermodynamics (For a Unique Ground State (W=1): S -> 0 as T -> 0) and Calculations Using Boltzmann Equation for Entropy
Topic: 3rd law of thermodynamics
Replies: 1
Views: 21

Re: 3rd law of thermodynamics

i think we just have to know that in a perfect crystalline substance there is no entropy. This can be found using the residual entropy equation: deltaS=kblnw and because it is already perfect the equation would then be delta s= kbln 1 which would be zero. This tells us that in a perfect crystalline ...
by 705121606
Mon Feb 10, 2020 2:57 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: entropy values
Replies: 1
Views: 15

entropy values

What are the different types of entropy such as positional entropy and can someone explain when each occurs
by 705121606
Mon Feb 10, 2020 2:33 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: heat
Replies: 1
Views: 13

heat

What is the difference between heat, heat capacity, and specific heat capacity? They all seem so similar to me and I get confused
by 705121606
Sat Feb 08, 2020 10:13 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Spontaneous reactions
Replies: 3
Views: 21

Spontaneous reactions

I know that having a negative delta g tells us that the reaction is spontaneous. When we are looking at delta s the total change in entropy being positive would also tell us the reaction would be spontaneous. Is this because a large delta s is being subtracted from delta h making delta g more negati...
by 705121606
Fri Feb 07, 2020 4:06 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: gibbs free energy of formation
Replies: 3
Views: 27

gibbs free energy of formation

How come a negative value of gibbs free energy is more stable compared to a positive value?
by 705121606
Wed Feb 05, 2020 3:04 pm
Forum: Calculating Work of Expansion
Topic: 4.17 C
Replies: 1
Views: 24

4.17 C

Th problem: 2SO2 (g) + O2 (g) --> 2SO3 (g) at 25C and 1 atm (with piston and constant pressure). initially .030 mol So2 and .030 mol O2 are present in a cylinder. He then adds a catalyst to initiate the reaction. In part C it tells us the creation goes to completion and the pressure at the reaction ...
by 705121606
Wed Feb 05, 2020 1:01 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 4E.9
Replies: 6
Views: 57

Re: 4E.9

I found this endorsed answer on chemistry community: "The kekule structure of benzene suggests alternating single and double bonds, whereas the resonance structure contains six bonds that are between a single and double bond. The resonance structure is more stable, as all six bonds between the ...
by 705121606
Wed Feb 05, 2020 12:57 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 4E.9
Replies: 6
Views: 57

Re: 4E.9

I am also confused on this because I thought because resonance had a higher enthalpy, more heat was absorbed making it a higher energy state and therefore less stable? Someone please explain
by 705121606
Wed Feb 05, 2020 12:56 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 4E.9
Replies: 6
Views: 57

Re: 4E.9

Benzene is more stable and less reactive than would be predicted from its Kekulé structures. Use the data in Table 4E.3 to calculate the lowering in molar energy when resonance is allowed between the Kekulé structures of benzene. When we calculate the molar energy without resonance, we get 2880 kJ,...
by 705121606
Tue Feb 04, 2020 11:45 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: 4D5
Replies: 3
Views: 25

4D5

"For a certain reaction at constant pressure, ΔH=-15kj and 22kj of expansion work is done on the system by compressing it into a smaller volume. What is ΔU?" I understand that ΔU=ΔH+w is the general equation. Here we know H is -15 I am confused because if it is expanding, I know an expansi...
by 705121606
Tue Feb 04, 2020 10:17 pm
Forum: Phase Changes & Related Calculations
Topic: sig figs
Replies: 2
Views: 17

sig figs

When we add or subtract, I know we are supposed to use the one with the least number of places after the decimal. But when we have two numbers without decimal points such as 524+340 would it be two sig figs because of 340 or would it be 864 because it still doesn't have an places after the decimal p...
by 705121606
Tue Feb 04, 2020 10:00 pm
Forum: Phase Changes & Related Calculations
Topic: reversible reactions
Replies: 2
Views: 20

Re: reversible reactions

It depends on the volumes given. That could be possible, but I think it means that, in comparison to an irreversible reaction, both reactions can reach the same final volume. However, the reversible reaction occurs slowly, that's why the equations are different. More work is done in this instance a...
by 705121606
Tue Feb 04, 2020 9:45 pm
Forum: Phase Changes & Related Calculations
Topic: reversible reactions
Replies: 2
Views: 20

reversible reactions

For reversible reactions the equation for work is w=-nrtln(v2/v1)
When it says that it can expand reversibly to the same final volume, does that just mean volume two is just double volume one?
by 705121606
Fri Jan 31, 2020 3:53 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Hess' Law
Replies: 7
Views: 29

Re: Hess' Law

yes! this is because it is a state property
by 705121606
Fri Jan 31, 2020 3:52 pm
Forum: Phase Changes & Related Calculations
Topic: Work Equation
Replies: 3
Views: 49

Re: Work Equation

When it is being compressed and volume is decreasing then work done on the gas/system is positive and gas done by the system is positive. When there is an expansion there is negative work done on the gas and positive work done by the gas.
by 705121606
Fri Jan 31, 2020 3:48 pm
Forum: Phase Changes & Related Calculations
Topic: Why does steam cause burns?
Replies: 29
Views: 152

Re: Why does steam cause burns?

Steam causes burns more than water because the change of phase from liquid water to water vapor requires more energy
by 705121606
Mon Jan 27, 2020 11:50 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: reaction enthalpy
Replies: 14
Views: 62

reaction enthalpy

why is the enthalpy negative when bonds are formed rather than when they are broken?
by 705121606
Mon Jan 27, 2020 8:33 pm
Forum: Phase Changes & Related Calculations
Topic: heat to raise temp
Replies: 2
Views: 37

Re: heat to raise temp

how do we calculate the heat necessary to raise the temperature of water
by 705121606
Mon Jan 27, 2020 4:45 pm
Forum: Phase Changes & Related Calculations
Topic: sig figs
Replies: 6
Views: 33

sig figs

"piston confines 0.250 mol He to 1.50L at 25C [...] the gas is able to expand through additional 1.20L against constant pressure of 1atm." The answer had 3 sig figs. I read the sig fig worksheet on Dr. Lavelle's website but I am still confused. What part of the question counts for sig figs...
by 705121606
Mon Jan 27, 2020 4:42 pm
Forum: Phase Changes & Related Calculations
Topic: heat to raise temp
Replies: 2
Views: 37

heat to raise temp

In problem 4A7b it asks what percentage of heat is used to raise the temperature of water. We are also told to specific heat and molar capacities. I wanted to know what the equation was to solve this question
by 705121606
Sun Jan 19, 2020 12:27 am
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: 5.29 calculating EQ concentration
Replies: 1
Views: 23

5.29 calculating EQ concentration

"In an experiment, 0.020 mol No2 was introduced into a flask with volume 1.00L and the reaction 2NO2(g) <---> N2O4(g) was allowed to come to equilibrium at 298k A) using the information in table 5E.2, calculate the EQ concentrations of the two gases" from the table 5E.2, the k value for th...
by 705121606
Fri Jan 17, 2020 4:38 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Quadratic
Replies: 10
Views: 59

Re: Quadratic

You would use the number that is less than your initial concentration you were given in the original problem.
by 705121606
Fri Jan 17, 2020 4:36 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Solids and Equilibrium
Replies: 9
Views: 42

Re: Solids and Equilibrium

They are pure substances; solids do not change concentration and in lecture I believe Dr. Lavelle said that the liquids act as solvent so the concentration is not really changed.
by 705121606
Fri Jan 17, 2020 4:34 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 5 percent rule
Replies: 10
Views: 58

Re: 5 percent rule

You can use the approximation when your K value is smaller than 10^-3 so you can save time not doing the quadratic equation. This is because a value that small in comparison to the initial values given will not affect your x value by much. After solving for x, you can do the % depronated. This is ca...
by 705121606
Fri Jan 17, 2020 4:31 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Tips for Test
Replies: 23
Views: 159

Re: Tips for Test

I did not take Dr. Lavelle's class last quarter; however, I plan on making sure I know how to do the problems given in outline 1 and 2. My TA suggested just to get as many practice problems done as possible because that is the best way to study 14B material. Last quarter for 14A I did read the textb...
by 705121606
Fri Jan 17, 2020 4:26 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Change on Same Side
Replies: 6
Views: 41

Re: Change on Same Side

If you increase N2, the increase in reactants would shift it toward the products meaning it would make more product. If you were to make more products, you need both the reactants to make it, H2 would also have to decrease.
by 705121606
Fri Jan 17, 2020 4:24 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: What is this?
Replies: 23
Views: 215

Re: What is this?

The principle is used to predict how how the system will react to stress. It will change to reduce this given stress. It would be important to know how temperature, pressure/volume, increase in reactants/products, decrease in reactant/products that affect the equation. It could shift left or right d...
by 705121606
Fri Jan 17, 2020 4:20 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Solids and Liquids in Le Chatelier
Replies: 5
Views: 25

Re: Solids and Liquids in Le Chatelier

They would not because we only take into account the gases. We take into account their molar concentrations.
by 705121606
Fri Jan 17, 2020 4:16 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Inert Gas does not change pressure?
Replies: 7
Views: 47

Re: Inert Gas does not change pressure?

Adding an inert gas to the container at constant volume would mean that pressure would increase but the equilibrium would not shift because it is not directly affecting the concentration of reactants and products. If it was the other case where addition of a gas changed the volume at constant pressu...
by 705121606
Fri Jan 17, 2020 4:06 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Kw
Replies: 16
Views: 84

Re: Kw

Nathan Rothschild_2D wrote:Kw is the equilibrium constant for water and at 25 C is 10^(-14), but if the equation doesn't specify the temperature, can we assume that the reaction is taking place at 25 C?


I believe so, if it was at a different temperature, that temperature would have to be specified.
by 705121606
Fri Jan 17, 2020 4:04 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Kw
Replies: 16
Views: 84

Re: Kw

They are the same value, just keep in mind that this value changes at different given temperatures. The one we use most often is 1.0 x10-14 at 25C.
by 705121606
Wed Jan 15, 2020 4:35 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Ice table/Ph of aqueous solutions
Replies: 2
Views: 29

Ice table/Ph of aqueous solutions

I Know the first test is going to cover chemical equilibrium and acids and bases. Will we have to know how to find the pH of aqueous solutions (topic 6D)?
by 705121606
Thu Jan 09, 2020 10:07 pm
Forum: Ideal Gases
Topic: 5G1 true/false
Replies: 8
Views: 65

5G1 true/false

The question asks to determine if the statement is true or false and explain why. In part c it states "If one starts with higher pressure of reactant, the equilibrium constant will be larger." I thought this was true because if there is higher pressure of reactant it will shift toward the ...

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