d) How would the rate law differ if the reactions were carried out in an organic solvent?
I am not sure how to answer this, can anyone explain? Thanks!
Search found 61 matches
- Sun Mar 17, 2019 7:33 pm
- Forum: General Rate Laws
- Topic: HW 7.23
- Replies: 1
- Views: 2085
- Sun Mar 17, 2019 7:32 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: HW 7E.7
- Replies: 1
- Views: 551
HW 7E.7
c) The pathway for a reaction is the same in the presence of a catalyst as in its absence, but the rate constants are decreased in both the forward and the reverse directions. d) A catalyst must be carefully chosen to shift the equilibrium toward the products. Decide which are true, and if the state...
- Sun Mar 17, 2019 7:27 pm
- Forum: Balancing Redox Reactions
- Topic: Oxidizing powers
- Replies: 2
- Views: 500
Oxidizing powers
How do you know which molecule has the strongest oxidation power using reduction potential?
- Sun Mar 17, 2019 7:26 pm
- Forum: Balancing Redox Reactions
- Topic: Reduction powers
- Replies: 2
- Views: 524
Reduction powers
How do you know when a molecule has the highest reduction power based off its reduction potential?
- Sun Mar 17, 2019 7:21 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Advice from a Medical Student [ENDORSED]
- Replies: 297
- Views: 461792
Re: Advice from a Medical Student [ENDORSED]
Thank you so much, this is so helpful. I am also planning on going to medical school and your advice is very much appreciated!
- Sun Mar 17, 2019 3:00 pm
- Forum: *Identifying Primary, Secondary, Tertiary, Quaternary Carbons, Hydrogens, Nitrogens
- Topic: Triprotic Acid
- Replies: 1
- Views: 1637
Triprotic Acid
On the final, there was a question about choosing the triprotic acid and I totally blanked. What does triprotic mean?
- Sun Mar 17, 2019 2:57 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Ka and Ionization Constant
- Replies: 1
- Views: 1447
Ka and Ionization Constant
Is the Ka and the ionization constant the same thing?
- Sun Mar 17, 2019 12:35 am
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Midterm Q4
- Replies: 3
- Views: 646
Midterm Q4
I was wondering, why was the ICE table not the right approach?
- Thu Mar 07, 2019 2:01 am
- Forum: First Order Reactions
- Topic: 7B.7
- Replies: 1
- Views: 210
7B.7
Substance A decomposes in a first order reaction and its half life is 355 s. How much time must elapse for the concentration of A to decrease to a) 1/8 of initial concentration b)1/4 of initial concentration c) 15% of initial concentration d) 1/9 of initial concentration How would I go about solving...
- Thu Mar 07, 2019 1:58 am
- Forum: First Order Reactions
- Topic: 7B.5 7th edition
- Replies: 1
- Views: 310
7B.5 7th edition
N2O5 decomposes by first order kinetics with a rate constant of 3.7*10^(-5) at 298K
For part a, find half life of N205 at 298K, what equation would I use?
For part c, how much time will elapse before the N2O5 concentration decreases from 0,0567 M to 0.0135 M? How would I solve this?
For part a, find half life of N205 at 298K, what equation would I use?
For part c, how much time will elapse before the N2O5 concentration decreases from 0,0567 M to 0.0135 M? How would I solve this?
- Thu Feb 28, 2019 1:08 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: writing cell diagrams
- Replies: 1
- Views: 216
writing cell diagrams
Why do some of the problems in the homework have answers with Pt(s) in them? When do we know when to add Pt(s) into our cell diagram?
- Thu Feb 28, 2019 12:17 am
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: 6L. 3
- Replies: 1
- Views: 174
6L. 3
d) Pt(s)|O2(g) | H(^+) (aq)| OH(^-1) (aq) | O2(g) | Pt(s)
I am having a really hard time locating the unbalanced reduction and oxidation reactions, and since I have O2 going to H(^+) and OH(^-1) going to O2, how would I balance these? Like does the hydrogen get balanced first or oxygen?
I am having a really hard time locating the unbalanced reduction and oxidation reactions, and since I have O2 going to H(^+) and OH(^-1) going to O2, how would I balance these? Like does the hydrogen get balanced first or oxygen?
- Tue Feb 26, 2019 11:38 pm
- Forum: Balancing Redox Reactions
- Topic: 6K. 5
- Replies: 1
- Views: 252
6K. 5
d) P4 (s) ---> H2PO2(^-1) (aq) + PH3 (aq)
oxidizing: 8OH(^-1) +P4 ---> 4H2PO2(^-1) +4e(^-1)
reduction: P4 ---> 4PH3
I have been trying to balance these reactions for so long and I don't get how to balance the reduction half equation? Can someone help?
oxidizing: 8OH(^-1) +P4 ---> 4H2PO2(^-1) +4e(^-1)
reduction: P4 ---> 4PH3
I have been trying to balance these reactions for so long and I don't get how to balance the reduction half equation? Can someone help?
- Tue Feb 26, 2019 7:10 pm
- Forum: Balancing Redox Reactions
- Topic: 6K.5 7th edition
- Replies: 1
- Views: 321
6K.5 7th edition
b.) Reaction of bromine with itself (disproportionation)in aqueous solution:
Br2 (l) ---> BrO3(^-1) (aq) + Br(^-1) (aq)
How would I write out the half reactions if I only have one reactant?
Br2 (l) ---> BrO3(^-1) (aq) + Br(^-1) (aq)
How would I write out the half reactions if I only have one reactant?
- Tue Feb 26, 2019 7:04 pm
- Forum: Balancing Redox Reactions
- Topic: 6K.3 7th edition
- Replies: 1
- Views: 239
6K.3 7th edition
d.) Reaction of chlorine in water:
Cl2 (g) ---> HClO (aq) + Cl2 (g)
I was wondering how would i work this problem out? Since I only have Cl2 on the reactants side, how do I make the oxidation and reduction half reactions? This is in an acidic solution
Cl2 (g) ---> HClO (aq) + Cl2 (g)
I was wondering how would i work this problem out? Since I only have Cl2 on the reactants side, how do I make the oxidation and reduction half reactions? This is in an acidic solution
- Sat Feb 23, 2019 9:57 pm
- Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
- Topic: Calculating enthalpy
- Replies: 1
- Views: 289
Calculating enthalpy
How would I calculate enthalpy in a reaction that has a constant pressure and constant temperature?
- Fri Feb 22, 2019 9:30 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: HW Problem 5.57
- Replies: 1
- Views: 248
HW Problem 5.57
C(s) + H2O(g) <---> CO(g) + H2(g)
a. Evaluate K at 900K given that the Gibbs Free Energy of formation for CO and H20 at 900K are -191.28 kJ/mol and -198.09 kJ/mol respectively
what equation would I use to find K?
a. Evaluate K at 900K given that the Gibbs Free Energy of formation for CO and H20 at 900K are -191.28 kJ/mol and -198.09 kJ/mol respectively
what equation would I use to find K?
- Fri Feb 22, 2019 9:09 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: HW problem 5.39 7th edition
- Replies: 1
- Views: 235
HW problem 5.39 7th edition
0.020mol of NO2 was introduced into a flask of 1.00L and 2NO2 (g) <---> N2O4 was allowed to come to equilibrium at 298K. To calculate the concentrations of both gases. I use the K(c) from Table 5G.2 and then would I use an ice chart? (since the K(c) in the table is for the reaction N204 <---> 2NO2, ...
- Wed Feb 13, 2019 12:06 am
- Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
- Topic: Increasing/Decreasing temp
- Replies: 8
- Views: 1127
Increasing/Decreasing temp
How does increasing or decreasing the temperature of a reaction affect it?
- Tue Feb 12, 2019 11:16 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: HW problem 4A. 13
- Replies: 2
- Views: 527
HW problem 4A. 13
Say youre given a reaction in a constant volume calorimeter, and you have to calculate the change in internal energy. This question gives us the q of a first reaction, q= -3.50 kJ, resulting temp rise of 7.32 degrees celsius Then a second experiment, 100.0 mL of 0.200 M HBr(aq) and 100.0 mL of 0.200...
- Tue Feb 12, 2019 9:02 pm
- Forum: Phase Changes & Related Calculations
- Topic: HW problem 4A. 13
- Replies: 1
- Views: 189
HW problem 4A. 13
An ice cube of mass 50.0g at 0.0 degrees celsius is added to a glass containing 400.0 g of water at 45.0 degrees celsius. What is the final temp of the system? I understand what to do but when I try to plug everything in, I am not getting the right answer. Im not sure if it's because i have to conve...
- Sun Feb 03, 2019 12:32 am
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: HW problem 4A.11
- Replies: 1
- Views: 236
HW problem 4A.11
A calorimeter was calibrated with an electric heater, which supplied 22.5 kJ of energy as heat to the calorimeter and increased the temperature of the calorimeter and its water bath from 22.45 degrees Celsius to 23.97 degrees Celsius. What is the heat capacity of the calorimeter? I was trying to wor...
- Wed Jan 30, 2019 11:40 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: HW problem 4B. 13
- Replies: 5
- Views: 927
HW problem 4B. 13
Calculate work for following process beginning with gas sample in a piston assembly with T=305K, P=1.79 atm, and V=4.29 L a.) Irreversible expansion against a constant external pressure of 1 atm to a final volume of 6.52 L I was able to calculate process a, -226 J but for b.) Isothermal, reversible ...
- Wed Jan 30, 2019 10:51 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: HW Problem 4A.9
- Replies: 3
- Views: 299
Re: HW Problem 4A.9
Thank you so much!
- Wed Jan 30, 2019 9:54 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: HW Problem 4A.9
- Replies: 3
- Views: 299
HW Problem 4A.9
A piece of copper of mass 20.0 g at 100.0 degrees Celsius is placed in a vessel of negligible heat capacity but containing 50.7 g of water at 22.0 degrees Celsius. Calculate the final temperature of water. Assume that no energy is lost to surroundings.
How do I go about solving this problem?
How do I go about solving this problem?
- Wed Jan 30, 2019 9:12 pm
- Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
- Topic: HW problem 4A.7
- Replies: 1
- Views: 401
HW problem 4A.7
Calculate the heat that must be supplied to a copper kettle of mass 400.0 g containing 300.0 g of water to raise its temperature from 20.0 degrees Celsius to the boiling point of water, 100.0 degrees Celsius. (given specific heat capacities for water and copper) Would I find the heat capacity for wa...
- Wed Jan 30, 2019 7:25 pm
- Forum: Phase Changes & Related Calculations
- Topic: HW problem 4A.5
- Replies: 1
- Views: 278
HW problem 4A.5
A piston confines 0.200mol Ne(g) in 1.20L at 25 degrees Celsius. Two experiments are performed: a.) The gas is allowed to expand through an additional 1.20L against a constant pressure of 1.00 atm b.) The gas is allowed to expand reversibly and isothermally to the same final volume which process doe...
- Wed Jan 23, 2019 11:05 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: HW Problem 6D. 17
- Replies: 2
- Views: 814
HW Problem 6D. 17
Calculate the pH of:
a.) 0.63 M NaCH3CO2
b.) 0.65 M KCN
How exactly do I go about working out this problem without a K value? I have been looking at the 6D.1 table and nothing seems to match so I am not sure how to solve it
a.) 0.63 M NaCH3CO2
b.) 0.65 M KCN
How exactly do I go about working out this problem without a K value? I have been looking at the 6D.1 table and nothing seems to match so I am not sure how to solve it
- Wed Jan 23, 2019 8:31 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: HW Problem 6D. 15
- Replies: 1
- Views: 223
HW Problem 6D. 15
Calculate the pH of:
a.) 0.19M NH4Cl (aq)
b.) 0.055M AlCl3 (aq)
I am stumped on this question. How do I go about it since they did not give me the Ka value?
a.) 0.19M NH4Cl (aq)
b.) 0.055M AlCl3 (aq)
I am stumped on this question. How do I go about it since they did not give me the Ka value?
- Tue Jan 15, 2019 7:23 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: HW problem 5I.17
- Replies: 2
- Views: 212
HW problem 5I.17
I was wondering, for this problem, I initially went in thinking that I would need to do an ICE box but I found the answer simply by using the equilibrium constant formula. How do you know when to do an ICE box? And also, why do the concentrations of N2 and O2 remain the same?
- Thu Jan 10, 2019 9:29 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: HW Problem 5H.1 [ENDORSED]
- Replies: 4
- Views: 392
HW Problem 5H.1 [ENDORSED]
N2 (g) + 3H2 (g) <---> 2NH3 (g) at 400. K, K=41
Find the value of K:
a) 2NH3 (g) <---> N2 (g) + 3H2 (g)
answer: 1/K : 0.024
But how do I find the K value for the other reactions?
b) 1/2 N2 (g) + 3/2 H2 (g) <---> NH3 (g)
c)2N2 (g) + 6H2 (g) <---> 4NH3 (g)
Find the value of K:
a) 2NH3 (g) <---> N2 (g) + 3H2 (g)
answer: 1/K : 0.024
But how do I find the K value for the other reactions?
b) 1/2 N2 (g) + 3/2 H2 (g) <---> NH3 (g)
c)2N2 (g) + 6H2 (g) <---> 4NH3 (g)
- Wed Jan 09, 2019 9:16 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Pressure
- Replies: 1
- Views: 125
Pressure
Does pressure affect the equilibrium constant?
- Sun Dec 09, 2018 3:13 pm
- Forum: Limiting Reactant Calculations
- Topic: moles of reagant
- Replies: 4
- Views: 734
moles of reagant
I want to make sure I am right but say you are asked to find the limiting reagent in a chemical reaction and then asked how many moles of that reagent is required, would you use the coefficient in the equation or do you need to solve it with conversions?
- Sun Dec 09, 2018 3:03 pm
- Forum: Heisenberg Indeterminacy (Uncertainty) Equation
- Topic: determining uncertainty in momentum
- Replies: 1
- Views: 459
determining uncertainty in momentum
I want to make sure that I know how to solve this problem: an electron is at about 1.00nm, find the uncertainty in its momentum
How do you go about solving a problem like this?
How do you go about solving a problem like this?
- Sun Dec 09, 2018 2:58 pm
- Forum: DeBroglie Equation
- Topic: momentum
- Replies: 2
- Views: 482
momentum
If you are given the momentum and mass of an object, and being told that it has the same momentum as a gamma ray. How do you use the momentum and mass to find the velocity of the object? Would it just be the p=mv equation?
- Sun Dec 09, 2018 2:52 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: coordination compound shape
- Replies: 3
- Views: 502
coordination compound shape
if we have a cation before the [M(Y)(X)], do we take that into consideration when asked to name the shape of the coordination compound? Or is the shape based on how many ligands are bound to the central atom?
- Sun Dec 09, 2018 2:50 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: determining second n value
- Replies: 1
- Views: 487
determining second n value
How do you find the second n value, say if they give you n=1 and the wavelength 1.0 10^-9m and ask for the highest energy level. How do you use the H-atom equation to figure out the high energy level?
- Sun Dec 09, 2018 4:13 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Polarity
- Replies: 2
- Views: 346
Polarity
Will a lone pair in the shape automatically make the compound polar?
- Sun Dec 09, 2018 4:11 am
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: polarizing power
- Replies: 3
- Views: 731
polarizing power
How does polarizing power differ from polarizability?
- Sun Dec 09, 2018 4:08 am
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: polarizability
- Replies: 1
- Views: 406
polarizability
When asked to arrange anions from least to most polarizable, does this mean to arrange them in order of those that can be the least distorted to the most distorted?
- Sun Dec 09, 2018 4:05 am
- Forum: Amphoteric Compounds
- Topic: Amphiprotic vs Amphoteric
- Replies: 5
- Views: 745
Amphiprotic vs Amphoteric
How can you figure out when a compound is amphiprotic or amphoteric? Is there anything specific i should be looking for?
- Sun Dec 09, 2018 4:01 am
- Forum: Naming
- Topic: ethylenediamine [ENDORSED]
- Replies: 4
- Views: 712
ethylenediamine [ENDORSED]
When naming a compound, ethylenediamine will always follow the Bis-, tris-, tetrakis- etc. rule right?
- Sun Dec 09, 2018 3:58 am
- Forum: Biological Examples
- Topic: Biological importance on final?
- Replies: 1
- Views: 440
Biological importance on final?
Will we need to know the biological importance of coordination compounds for the final, for example the cisplatin example we did in class?
- Sun Dec 09, 2018 3:55 am
- Forum: Biological Examples
- Topic: Myoglobin? [ENDORSED]
- Replies: 1
- Views: 379
Myoglobin? [ENDORSED]
How many 02 molecules can myoglobin bind and why?
- Sun Dec 09, 2018 3:53 am
- Forum: Identifying Acidic & Basic Salts
- Topic: salts?
- Replies: 1
- Views: 308
salts?
I do not understand what they are? How do they affect the pH?
- Sun Dec 09, 2018 3:48 am
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: IMF [ENDORSED]
- Replies: 6
- Views: 953
IMF [ENDORSED]
What are induced-dipole forces? How do they differ from dipole-dipole forces?
- Sun Dec 09, 2018 3:46 am
- Forum: Properties & Structures of Inorganic & Organic Acids
- Topic: Boiling point
- Replies: 4
- Views: 811
Boiling point
Between H2S and H2Se, explain why H2Se has a higher boiling point.
In this case, even though H2S has dipole-dipole forces, H2Se has stronger LDFs. Why do the LDF dominate dipole dipole forces when dipole dipoles are stronger?
In this case, even though H2S has dipole-dipole forces, H2Se has stronger LDFs. Why do the LDF dominate dipole dipole forces when dipole dipoles are stronger?
- Sun Dec 09, 2018 2:39 am
- Forum: Bond Lengths & Energies
- Topic: Bonds
- Replies: 1
- Views: 508
Bonds
Which has the strongest bond?
F2, F2 ^-1, F2 ^+1
F2, F2 ^-1, F2 ^+1
- Sun Dec 09, 2018 2:38 am
- Forum: Bond Lengths & Energies
- Topic: Bond Length
- Replies: 1
- Views: 468
Bond Length
Which has the longest bond and why? bond order?
F2, F2 ^-1, F2 ^+1
F2, F2 ^-1, F2 ^+1
- Sun Dec 09, 2018 2:35 am
- Forum: Photoelectric Effect
- Topic: Finding frequency
- Replies: 2
- Views: 2474
Finding frequency
An electron was ejected from a sodium metal surface with light of a given frequency. If the wavelength of the ejected electron is 1.1 nm, what was the frequency of the incident light? The work function of sodium is 150.6 kJ/mol. I always get stuck on finding the velocity in the Kinetic energy portio...
- Sat Dec 08, 2018 9:37 pm
- Forum: Conjugate Acids & Bases
- Topic: Strong acids
- Replies: 3
- Views: 443
Strong acids
When being asked to choose the stronger acid, you first look at the bond length and, if that is not comparable you look at the conjugate base right? Does a strong conjugate base mean a stronger acid? Or is it a weak conjugate base that means a stronger acid?
- Sat Dec 08, 2018 9:29 pm
- Forum: Bronsted Acids & Bases
- Topic: Strong base
- Replies: 5
- Views: 766
Strong base
Why is NaOH a strong base?
- Sat Dec 08, 2018 9:27 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Polydentates
- Replies: 2
- Views: 303
Polydentates
How can you tell if a ligand is going to be acting as a polydentate?
- Sat Dec 08, 2018 9:24 pm
- Forum: Calculating the pH of Salt Solutions
- Topic: calculating pH
- Replies: 4
- Views: 633
calculating pH
At Lyndon's review session this friday, I'm not sure if I heard right but we will be asked to find the pH of strong acids, on the final, only right?
- Sat Dec 08, 2018 9:22 pm
- Forum: Bronsted Acids & Bases
- Topic: Strong acid
- Replies: 6
- Views: 842
Strong acid
Why is HCl a strong acid?
- Thu Dec 06, 2018 1:17 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: 6B. 5
- Replies: 1
- Views: 201
6B. 5
c.) 0.0092M Ba(OH)2
How do we calculate the pOH? And the pH?
How do we calculate the pOH? And the pH?
- Thu Dec 06, 2018 1:02 am
- Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
- Topic: 6B. 3 [ENDORSED]
- Replies: 3
- Views: 439
6B. 3 [ENDORSED]
A careless lab tech wants to prepare 200.00 mL of a 0.025M HCl solution but uses a volumetric flask of volume 250.0mL. a.) What would be the pH of the desired solution? b.) What will be the actual pH of the prepared solution? How do you find the pH? I know pH= -log[H3O+] but how do we find the molar...
- Sun Dec 02, 2018 6:54 pm
- Forum: Student Social/Study Group
- Topic: Fall 2018 Final
- Replies: 1
- Views: 523
Fall 2018 Final
Do any of you know if on the final, for the acids and bases part, when we complete the reaction equation will we need to add the states as well?
- Sun Dec 02, 2018 6:48 pm
- Forum: Bronsted Acids & Bases
- Topic: Bronsted vs Lewis
- Replies: 4
- Views: 487
Bronsted vs Lewis
What is the difference between a Bronsted Acid and a Lewis Acid? A Bronsted Base and a Lewis Base?
- Tue Nov 27, 2018 9:33 pm
- Forum: Hybridization
- Topic: HW Problem 2F.15
- Replies: 1
- Views: 177
HW Problem 2F.15
How does the bond angle and s-character relate? For this problem, the answer is that the bond angles increase as the s-character of the hybrids increase, why is this so?
- Thu Oct 04, 2018 5:21 pm
- Forum: Empirical & Molecular Formulas
- Topic: HW 1 Problem F.9
- Replies: 7
- Views: 480
HW 1 Problem F.9
When asked, "what atom ratios are the atoms present", does it mean find the empirical formula?