Search found 59 matches

by jocelyntzeng
Sat Mar 16, 2019 1:10 pm
Forum: Ideal Gases
Topic: ICE table
Replies: 5
Views: 270

Re: ICE table

you can use bar you dont have to convert to concentration
by jocelyntzeng
Sat Mar 16, 2019 1:10 pm
Forum: Ideal Gases
Topic: kc vs kp
Replies: 16
Views: 453

Re: kc vs kp

they are used interchangeably just depends on what you are given, partial pressures or concentrations
by jocelyntzeng
Sat Mar 16, 2019 1:08 pm
Forum: Ideal Gases
Topic: breaking bond - heat released and gained
Replies: 5
Views: 259

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
by jocelyntzeng
Sat Mar 16, 2019 1:07 pm
Forum: Ideal Gases
Topic: PV=nRT
Replies: 8
Views: 354

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
by jocelyntzeng
Sat Mar 16, 2019 1:06 pm
Forum: Ideal Gases
Topic: ICE table
Replies: 11
Views: 362

Re: ICE table

they can also be used to acid and base
by jocelyntzeng
Sat Mar 16, 2019 1:06 pm
Forum: Ideal Gases
Topic: units for partial pressure of gases
Replies: 6
Views: 245

Re: units for partial pressure of gases

i think both are ok just be careful when using R values
by jocelyntzeng
Sat Mar 16, 2019 1:05 pm
Forum: Ideal Gases
Topic: OH and H3O
Replies: 10
Views: 383

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
by jocelyntzeng
Sat Mar 16, 2019 1:04 pm
Forum: Ideal Gases
Topic: SI Units
Replies: 5
Views: 260

Re: SI Units

it is atm
by jocelyntzeng
Sat Mar 16, 2019 1:03 pm
Forum: Ideal Gases
Topic: Ideal gas constant R
Replies: 9
Views: 357

Re: Ideal gas constant R

just look at the units and see which one to use
by jocelyntzeng
Sat Mar 16, 2019 1:03 pm
Forum: Ideal Gases
Topic: Different Pressure Definition
Replies: 3
Views: 217

Re: Different Pressure Definition

no you would report as bar
by jocelyntzeng
Sat Mar 16, 2019 1:02 pm
Forum: Ideal Gases
Topic: derivatives and integrals
Replies: 6
Views: 272

Re: derivatives and integrals

he won't actually have us do the calculus he was just showing us how he got to the equations
by jocelyntzeng
Sat Mar 16, 2019 1:02 pm
Forum: Ideal Gases
Topic: The Difference between Q and Kc
Replies: 12
Views: 643

Re: The Difference between Q and Kc

q is the ratio of products and reactants at that moment whereas Kc is the ratio at equilibrium
by jocelyntzeng
Sat Mar 16, 2019 12:56 pm
Forum: Ideal Gases
Topic: pH and pOH
Replies: 18
Views: 506

Re: pH and pOH

it will ask you specifically but usually it is pH
by jocelyntzeng
Sat Mar 16, 2019 12:55 pm
Forum: Ideal Gases
Topic: Calculating Pressure of a Gas Mixture Using PV=nRT
Replies: 3
Views: 229

Re: Calculating Pressure of a Gas Mixture Using PV=nRT

can add them together then solve, or solve them separately and add together
by jocelyntzeng
Sat Mar 16, 2019 12:55 pm
Forum: Ideal Gases
Topic: pV=nRT
Replies: 12
Views: 385

Re: pV=nRT

it can also be used to replace pV with nRT in some equations
by jocelyntzeng
Sat Mar 16, 2019 12:52 pm
Forum: Ideal Gases
Topic: ICE Table Values
Replies: 9
Views: 306

Re: ICE Table Values

it can also be used in calculated Q and K like partial pressure
by jocelyntzeng
Sat Mar 16, 2019 12:51 pm
Forum: Ideal Gases
Topic: sre
Replies: 5
Views: 113

Re: sre

is standard state at 1 bar or 1 atm
by jocelyntzeng
Sat Mar 16, 2019 12:51 pm
Forum: Ideal Gases
Topic: Water
Replies: 13
Views: 232

Re: Water

it becomes a gas or solid if it is vaporized or frozen
by jocelyntzeng
Sat Mar 16, 2019 12:50 pm
Forum: Ideal Gases
Topic: Ideal gases
Replies: 5
Views: 86

Re: Ideal gases

yes it will tell you if you need to assume that
by jocelyntzeng
Sat Mar 16, 2019 12:50 pm
Forum: Ideal Gases
Topic: Cell Diagram/Ecell
Replies: 8
Views: 291

Re: Cell Diagram/Ecell

anode is oxidation and it is on the left whereas cathode is reduction and it is on the right
by jocelyntzeng
Sat Mar 16, 2019 12:48 pm
Forum: Ideal Gases
Topic: ICE
Replies: 8
Views: 125

Re: ICE

yes you can approximate but always check with the 5% rule
by jocelyntzeng
Sat Mar 16, 2019 12:47 pm
Forum: Ideal Gases
Topic: Q and K
Replies: 13
Views: 233

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
by jocelyntzeng
Sat Mar 16, 2019 12:46 pm
Forum: Ideal Gases
Topic: 5% rule
Replies: 12
Views: 292

Re: 5% rule

you use the 5% rule to check to make sure that your approximation is correct and can be used
by jocelyntzeng
Sat Mar 16, 2019 12:46 pm
Forum: Ideal Gases
Topic: Approximations for ICE
Replies: 20
Views: 251

Re: Approximations for ICE

K has to be very small so you can assume that x is very small
by jocelyntzeng
Sat Mar 16, 2019 12:45 pm
Forum: Ideal Gases
Topic: units
Replies: 15
Views: 375

Re: units

K is unitless
by jocelyntzeng
Sat Mar 16, 2019 12:44 pm
Forum: Ideal Gases
Topic: atm vs. bar?
Replies: 23
Views: 443

Re: atm vs. bar?

you can easily convert between the two but just be careful to use the right R value corresponding
by jocelyntzeng
Sat Mar 16, 2019 12:44 pm
Forum: Ideal Gases
Topic: How do I know what is an Ideal Gas
Replies: 11
Views: 189

Re: How do I know what is an Ideal Gas

the question will say that it is an ideal gas
by jocelyntzeng
Sat Mar 16, 2019 12:43 pm
Forum: Ideal Gases
Topic: SI Units
Replies: 3
Views: 209

Re: SI Units

atm is most commonly used
by jocelyntzeng
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: 62

Re: What is a porous disk?

it's like a salt bridge, it replenishes the electrolytes
by jocelyntzeng
Sat Mar 16, 2019 12:38 pm
Forum: Administrative Questions and Class Announcements
Topic: Collision theory
Replies: 1
Views: 185

Re: Collision theory

no we did not
by jocelyntzeng
Sat Mar 16, 2019 12:38 pm
Forum: General Rate Laws
Topic: Instantaneous Rate
Replies: 1
Views: 153

Re: Instantaneous Rate

yes it does because it is the rate at that particular moment
by jocelyntzeng
Sat Mar 16, 2019 12:33 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Equalibrium Constants and Solubility
Replies: 1
Views: 42

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
by jocelyntzeng
Sat Mar 16, 2019 12:31 pm
Forum: General Rate Laws
Topic: Unique Average Rate
Replies: 1
Views: 152

Re: Unique Average Rate

yes that is correct
by jocelyntzeng
Sat Mar 16, 2019 12:29 pm
Forum: General Rate Laws
Topic: Average Rate of Reaction
Replies: 2
Views: 146

Re: Average Rate of Reaction

yes that is correct
by jocelyntzeng
Sat Mar 16, 2019 12:29 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: Finding k
Replies: 1
Views: 37

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
by jocelyntzeng
Sat Mar 16, 2019 12:28 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: Catalysts
Replies: 2
Views: 43

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
by jocelyntzeng
Sat Mar 16, 2019 12:26 pm
Forum: Zero Order Reactions
Topic: Graphs
Replies: 3
Views: 178

Re: Graphs

We won't be required to draw graphs but be able to interpret them.
by jocelyntzeng
Sun Jan 13, 2019 5:09 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: equations
Replies: 10
Views: 130

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)
by jocelyntzeng
Sun Jan 13, 2019 5:03 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Heterogeneous and homogeneous equilibria [ENDORSED]
Replies: 8
Views: 143

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.
by jocelyntzeng
Sat Dec 08, 2018 12:41 pm
Forum: Naming
Topic: naming compounds
Replies: 6
Views: 169

naming compounds

can someone explain to me the difference in using di, tri, tetra, and bis, tris, and tetrakis
by jocelyntzeng
Sun Dec 02, 2018 5:07 pm
Forum: Hybridization
Topic: Hybridization
Replies: 3
Views: 100

Re: Hybridization

depends because hybridization only determines electron arrangement on the central atom
by jocelyntzeng
Sun Dec 02, 2018 5:00 pm
Forum: Hybridization
Topic: Hybridization
Replies: 11
Views: 191

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
by jocelyntzeng
Sun Nov 25, 2018 5:29 pm
Forum: Sigma & Pi Bonds
Topic: Location of Sigma and Pi Bonds
Replies: 5
Views: 87

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)
by jocelyntzeng
Sun Nov 25, 2018 5:28 pm
Forum: Octet Exceptions
Topic: Radicals
Replies: 16
Views: 547

Re: Radicals

I think just the basic application, and where it comes up and how it affects the molecule (ie makes it more unstable)
by jocelyntzeng
Sun Nov 25, 2018 5:26 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Hypothetical Shape Question
Replies: 2
Views: 73

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.
by jocelyntzeng
Sun Nov 18, 2018 10:17 pm
Forum: Polarisability of Anions, The Polarizing Power of Cations
Topic: polarizing power and polarizability
Replies: 2
Views: 81

Re: polarizing power and polarizability

yup i think that that is correct!
by jocelyntzeng
Sun Nov 18, 2018 10:17 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Octahedral to Square Planar
Replies: 7
Views: 109

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.
by jocelyntzeng
Sun Nov 18, 2018 10:15 pm
Forum: Hybridization
Topic: Promotion
Replies: 3
Views: 85

Re: Promotion

Electron promotion is when an electron absorbs a photon to jump from a low energy level orbital to a higher energy orbital
by jocelyntzeng
Thu Nov 08, 2018 4:17 pm
Forum: Dipole Moments
Topic: Polarizability
Replies: 5
Views: 106

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
by jocelyntzeng
Tue Oct 30, 2018 9:52 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Energy and Stability of an Atom
Replies: 2
Views: 92

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
by jocelyntzeng
Tue Oct 30, 2018 9:47 pm
Forum: Lewis Structures
Topic: central atoms
Replies: 8
Views: 172

central atoms

is the central atom the element with the lowest ionization energy or the lowest electronegativity?
by jocelyntzeng
Sun Oct 21, 2018 5:59 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Energy levels of orbitals?
Replies: 10
Views: 148

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.
by jocelyntzeng
Sun Oct 21, 2018 5:58 pm
Forum: *Black Body Radiation
Topic: Black Body
Replies: 10
Views: 453

Re: Black Body

Nope I don't think we need to know those things
by jocelyntzeng
Sun Oct 21, 2018 5:57 pm
Forum: Properties of Electrons
Topic: Test question
Replies: 6
Views: 229

Re: Test question

Nope I don't think we need to know that!
by jocelyntzeng
Fri Oct 05, 2018 1:13 am
Forum: SI Units, Unit Conversions
Topic: units during dimensional analysis
Replies: 4
Views: 106

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.
by jocelyntzeng
Fri Oct 05, 2018 1:05 am
Forum: SI Units, Unit Conversions
Topic: SI Units
Replies: 7
Views: 164

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
by jocelyntzeng
Fri Oct 05, 2018 12:59 am
Forum: Significant Figures
Topic: Sig Figs
Replies: 5
Views: 111

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?

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