Search found 59 matches
- Sat Mar 16, 2019 1:10 pm
- Forum: Ideal Gases
- Topic: ICE table
- Replies: 5
- Views: 703
Re: ICE table
you can use bar you dont have to convert to concentration
- Sat Mar 16, 2019 1:10 pm
- Forum: Ideal Gases
- Topic: kc vs kp
- Replies: 19
- Views: 3315
Re: kc vs kp
they are used interchangeably just depends on what you are given, partial pressures or concentrations
- Sat Mar 16, 2019 1:08 pm
- Forum: Ideal Gases
- Topic: breaking bond - heat released and gained
- Replies: 5
- Views: 847
Re: breaking bond - heat released and gained
it requires energy but it also releases energy so overall it is exothermic whereas making bonds just requires energy so it is endothermic
- Sat Mar 16, 2019 1:07 pm
- Forum: Ideal Gases
- Topic: PV=nRT
- Replies: 8
- Views: 1082
Re: PV=nRT
ideal gas law can also be used to find one part of the equation to put into another equation or sometimes to directly substitute into an equation
- Sat Mar 16, 2019 1:06 pm
- Forum: Ideal Gases
- Topic: ICE table
- Replies: 11
- Views: 1227
Re: ICE table
they can also be used to acid and base
- Sat Mar 16, 2019 1:06 pm
- Forum: Ideal Gases
- Topic: units for partial pressure of gases
- Replies: 6
- Views: 680
Re: units for partial pressure of gases
i think both are ok just be careful when using R values
- Sat Mar 16, 2019 1:05 pm
- Forum: Ideal Gases
- Topic: OH and H3O
- Replies: 10
- Views: 1235
Re: OH and H3O
from OH and H3O concentrations you can determine which one is in excess and that determines if it is a acid or base
- Sat Mar 16, 2019 1:04 pm
- Forum: Ideal Gases
- Topic: SI Units
- Replies: 5
- Views: 631
Re: SI Units
it is atm
- Sat Mar 16, 2019 1:03 pm
- Forum: Ideal Gases
- Topic: Ideal gas constant R
- Replies: 10
- Views: 1547
Re: Ideal gas constant R
just look at the units and see which one to use
- Sat Mar 16, 2019 1:03 pm
- Forum: Ideal Gases
- Topic: Different Pressure Definition
- Replies: 3
- Views: 493
Re: Different Pressure Definition
no you would report as bar
- Sat Mar 16, 2019 1:02 pm
- Forum: Ideal Gases
- Topic: derivatives and integrals
- Replies: 6
- Views: 954
Re: derivatives and integrals
he won't actually have us do the calculus he was just showing us how he got to the equations
- Sat Mar 16, 2019 1:02 pm
- Forum: Ideal Gases
- Topic: The Difference between Q and Kc [ENDORSED]
- Replies: 18
- Views: 8429
Re: The Difference between Q and Kc [ENDORSED]
q is the ratio of products and reactants at that moment whereas Kc is the ratio at equilibrium
- Sat Mar 16, 2019 12:56 pm
- Forum: Ideal Gases
- Topic: pH and pOH
- Replies: 18
- Views: 1785
Re: pH and pOH
it will ask you specifically but usually it is pH
- Sat Mar 16, 2019 12:55 pm
- Forum: Ideal Gases
- Topic: Calculating Pressure of a Gas Mixture Using PV=nRT
- Replies: 3
- Views: 528
Re: Calculating Pressure of a Gas Mixture Using PV=nRT
can add them together then solve, or solve them separately and add together
- Sat Mar 16, 2019 12:55 pm
- Forum: Ideal Gases
- Topic: pV=nRT
- Replies: 12
- Views: 1989
Re: pV=nRT
it can also be used to replace pV with nRT in some equations
- Sat Mar 16, 2019 12:52 pm
- Forum: Ideal Gases
- Topic: ICE Table Values
- Replies: 9
- Views: 1227
Re: ICE Table Values
it can also be used in calculated Q and K like partial pressure
- Sat Mar 16, 2019 12:51 pm
- Forum: Ideal Gases
- Topic: sre
- Replies: 5
- Views: 558
Re: sre
is standard state at 1 bar or 1 atm
- Sat Mar 16, 2019 12:51 pm
- Forum: Ideal Gases
- Topic: Water
- Replies: 13
- Views: 992
Re: Water
it becomes a gas or solid if it is vaporized or frozen
- Sat Mar 16, 2019 12:50 pm
- Forum: Ideal Gases
- Topic: Ideal gases
- Replies: 5
- Views: 413
Re: Ideal gases
yes it will tell you if you need to assume that
- Sat Mar 16, 2019 12:50 pm
- Forum: Ideal Gases
- Topic: Cell Diagram/Ecell
- Replies: 8
- Views: 886
Re: Cell Diagram/Ecell
anode is oxidation and it is on the left whereas cathode is reduction and it is on the right
- Sat Mar 16, 2019 12:48 pm
- Forum: Ideal Gases
- Topic: ICE
- Replies: 8
- Views: 615
Re: ICE
yes you can approximate but always check with the 5% rule
- Sat Mar 16, 2019 12:47 pm
- Forum: Ideal Gases
- Topic: Q and K
- Replies: 13
- Views: 1217
Re: Q and K
Q is not always at equilibrium but it can be; it is most often used to show to which side the reaction will shift to
- Sat Mar 16, 2019 12:46 pm
- Forum: Ideal Gases
- Topic: 5% rule
- Replies: 12
- Views: 3369
Re: 5% rule
you use the 5% rule to check to make sure that your approximation is correct and can be used
- Sat Mar 16, 2019 12:46 pm
- Forum: Ideal Gases
- Topic: Approximations for ICE
- Replies: 20
- Views: 1465
Re: Approximations for ICE
K has to be very small so you can assume that x is very small
- Sat Mar 16, 2019 12:45 pm
- Forum: Ideal Gases
- Topic: units
- Replies: 15
- Views: 1269
Re: units
K is unitless
- Sat Mar 16, 2019 12:44 pm
- Forum: Ideal Gases
- Topic: atm vs. bar?
- Replies: 25
- Views: 2715
Re: atm vs. bar?
you can easily convert between the two but just be careful to use the right R value corresponding
- Sat Mar 16, 2019 12:44 pm
- Forum: Ideal Gases
- Topic: How do I know what is an Ideal Gas
- Replies: 11
- Views: 900
Re: How do I know what is an Ideal Gas
the question will say that it is an ideal gas
- Sat Mar 16, 2019 12:43 pm
- Forum: Ideal Gases
- Topic: SI Units
- Replies: 3
- Views: 526
Re: SI Units
atm is most commonly used
- Sat Mar 16, 2019 12:40 pm
- Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
- Topic: What is a porous disk?
- Replies: 3
- Views: 916
Re: What is a porous disk?
it's like a salt bridge, it replenishes the electrolytes
- Sat Mar 16, 2019 12:38 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Collision theory
- Replies: 1
- Views: 389
Re: Collision theory
no we did not
- Sat Mar 16, 2019 12:38 pm
- Forum: General Rate Laws
- Topic: Instantaneous Rate
- Replies: 1
- Views: 368
Re: Instantaneous Rate
yes it does because it is the rate at that particular moment
- Sat Mar 16, 2019 12:33 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Equalibrium Constants and Solubility
- Replies: 1
- Views: 1223
Re: Equalibrium Constants and Solubility
solubility is how able a solid is able to dissolve so that means that products are more favored in compounds with higher solubility which means it has a higher equilibrium constant
- Sat Mar 16, 2019 12:31 pm
- Forum: General Rate Laws
- Topic: Unique Average Rate
- Replies: 1
- Views: 379
Re: Unique Average Rate
yes that is correct
- Sat Mar 16, 2019 12:31 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Porous disk
- Replies: 1
- Views: 142
Re: Porous disk
they help to maintain the balance of electrolytes
- Sat Mar 16, 2019 12:29 pm
- Forum: General Rate Laws
- Topic: Average Rate of Reaction
- Replies: 2
- Views: 430
Re: Average Rate of Reaction
yes that is correct
- Sat Mar 16, 2019 12:29 pm
- Forum: Reaction Mechanisms, Reaction Profiles
- Topic: Finding k
- Replies: 1
- Views: 164
Re: Finding k
it should tell you which trial you are using or give you other information from which you then see which trial to use
- Sat Mar 16, 2019 12:28 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Catalysts
- Replies: 2
- Views: 250
Re: Catalysts
you need to be able to identify them in an equation, explain how they lower the activation energy at the transition state, explain how it increases the rate, and give an example
- Sat Mar 16, 2019 12:26 pm
- Forum: Zero Order Reactions
- Topic: Graphs
- Replies: 13
- Views: 1287
Re: Graphs
We won't be required to draw graphs but be able to interpret them.
- Sun Jan 13, 2019 5:09 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: True or False regarding reaction mixture [ENDORSED]
- Replies: 10
- Views: 692
Re: True or False regarding reaction mixture [ENDORSED]
yup that is true!
- Sun Jan 13, 2019 5:09 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: equations
- Replies: 10
- Views: 687
Re: equations
you should be able to tell which one is a product if it is a mixture of two of the other molecules (if your question is regarding like hw only giving moeclues and no chemical equation)
- Sun Jan 13, 2019 5:03 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Heterogeneous and homogeneous equilibria [ENDORSED]
- Replies: 8
- Views: 682
Re: Heterogeneous and homogeneous equilibria [ENDORSED]
Heterogeneous equilibrium is where different states of matter are present within a reaction and homogeneous means that there are no different states, everything is that same.
- Sat Dec 08, 2018 12:41 pm
- Forum: Naming
- Topic: naming compounds
- Replies: 6
- Views: 563
naming compounds
can someone explain to me the difference in using di, tri, tetra, and bis, tris, and tetrakis
- Sun Dec 02, 2018 5:07 pm
- Forum: Hybridization
- Topic: Hybridization
- Replies: 3
- Views: 396
Re: Hybridization
depends because hybridization only determines electron arrangement on the central atom
- Sun Dec 02, 2018 5:00 pm
- Forum: Hybridization
- Topic: Hybridization
- Replies: 11
- Views: 1164
Re: Hybridization
it depends! hybridization is mainly talking about electron arrangement on the central atom (which includes both lone pairs and bonding pairs) so there are different shapes depending on the amount of lone pairs and bonding pair
- Sun Nov 25, 2018 5:29 pm
- Forum: Sigma & Pi Bonds
- Topic: Location of Sigma and Pi Bonds
- Replies: 5
- Views: 385
Re: Location of Sigma and Pi Bonds
Yup so a sigma bond is basically when two atoms share 2 electrons, which forms a single bond and a pi bond is a double bond (with on single bond)
- Sun Nov 25, 2018 5:28 pm
- Forum: Octet Exceptions
- Topic: Radicals
- Replies: 16
- Views: 1631
Re: Radicals
I think just the basic application, and where it comes up and how it affects the molecule (ie makes it more unstable)
- Sun Nov 25, 2018 5:26 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Hypothetical Shape Question
- Replies: 2
- Views: 237
Re: Hypothetical Shape Question
So basically you would want the structure where the formal charges are closest to zero to determine where the double bonds belong. It's also important to remember which elements are more electronegative so you know which atoms are more likely to have a non zero formal charge.
- Sun Nov 18, 2018 10:17 pm
- Forum: Polarisability of Anions, The Polarizing Power of Cations
- Topic: polarizing power and polarizability
- Replies: 2
- Views: 284
Re: polarizing power and polarizability
yup i think that that is correct!
- Sun Nov 18, 2018 10:17 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Octahedral to Square Planar
- Replies: 7
- Views: 906
Re: Octahedral to Square Planar
So octahedral is when 6 atoms are around a central atom whereas square planar instead of 6 atoms has 4 atoms and 2 lone pairs.
- Sun Nov 18, 2018 10:15 pm
- Forum: Hybridization
- Topic: Promotion
- Replies: 3
- Views: 296
Re: Promotion
Electron promotion is when an electron absorbs a photon to jump from a low energy level orbital to a higher energy orbital
- Thu Nov 08, 2018 4:17 pm
- Forum: Dipole Moments
- Topic: Polarizability
- Replies: 5
- Views: 346
Re: Polarizability
polarizability is a measure of how easily electrons can be pulled by an electric field. if electrons are easily distorted/not shared equally among the atoms, then it is very polarizable
- Tue Oct 30, 2018 9:52 pm
- Forum: Formal Charge and Oxidation Numbers
- Topic: Energy and Stability of an Atom
- Replies: 2
- Views: 327
Re: Energy and Stability of an Atom
when you add all the formal charges of all the atoms together you get the overall formal charge of the molecule, so you want to have the least charged molecule
- Tue Oct 30, 2018 9:47 pm
- Forum: Lewis Structures
- Topic: central atoms
- Replies: 8
- Views: 724
central atoms
is the central atom the element with the lowest ionization energy or the lowest electronegativity?
- Sun Oct 21, 2018 5:59 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Energy levels of orbitals?
- Replies: 10
- Views: 706
Re: Energy levels of orbitals?
It is s<p<d<f because the different levels correspond with how far the electrons are from the nucleus.
- Sun Oct 21, 2018 5:58 pm
- Forum: *Black Body Radiation
- Topic: Black Body
- Replies: 10
- Views: 1262
Re: Black Body
Nope I don't think we need to know those things
- Sun Oct 21, 2018 5:57 pm
- Forum: Properties of Electrons
- Topic: Test question
- Replies: 6
- Views: 578
Re: Test question
Nope I don't think we need to know that!
- Fri Oct 05, 2018 1:13 am
- Forum: SI Units, Unit Conversions
- Topic: units during dimensional analysis
- Replies: 4
- Views: 428
Re: units during dimensional analysis
yes, it's often really easy to overlook some units and when looking back at your work, you can easily forget why your wrote what you wrote. so, writing down your units everytime saves silly mistakes.
- Fri Oct 05, 2018 1:05 am
- Forum: SI Units, Unit Conversions
- Topic: SI Units
- Replies: 7
- Views: 509
Re: SI Units
i agree, regardless of what the units you end up with, you should always end with the units that the question asks for
- Fri Oct 05, 2018 12:59 am
- Forum: Significant Figures
- Topic: Sig Figs
- Replies: 5
- Views: 520
Sig Figs
If you have multiple numbers within an equation, and one of them is much more significant than the other (or the number with the largest sig fig is irrelevant), do you go with the most relevant one or with the data provided?