CHEMISTRY COMMUNITY

briannam_1F

Kc is used when molarity is given. When it comes to gas you only use Kp when given partial pressures or asked to convert to partial pressures.

briannam_1F

Can someone explain why Lavelle didn't like to say define entropy as "disorder?"

briannam_1F

We want the ECell to be positive in order to do work because once the Ecell is equal to zero then that is when the battery is considered to be "dead."

briannam_1F

I had asked my TA about when to use Pt(s) or when to use C(gr) and she recommended to just go with using Pt(s).

briannam_1F

What changes would result in changes in the Ecell potential?

briannam_1F

How is the denotation for the three versions different?

briannam_1F

When are we expected to use the differential rate law?

briannam_1F

Can someone explain what an electromotive force is? Also, does anyone remember what day it was talked about in lecture, if it was discussed in lecture.

briannam_1F

What should we be thinking about when we come across "ideal gas?"

briannam_1F

What's the method to calculate doe total entropy?

briannam_1F

How does one calculate the pH of a weak acid and its salt?

briannam_1F

Can someone specify when one should use Pt(s) or C(gr) as our inert metal. Or should we just always assume that we should use Pt(s)?

briannam_1F

A tin electrode in 0.015 m Sn(NO3)2(aq) is connected to a hydrogen electrode in which the pressure of H2 is 1.0 bar. If the cell potential is 0.061 V at 25 8C, what is the pH of the electrolyte at the hydrogen electrode? --> When given Sn(NO3)2(aq) how does one know that it is going to be Sn --> Sn2...

briannam_1F

When given the equation: 2Hg^+2 Br- --> Hg2 ^+2 + Br2

For the half-reaction, do the electrons (2e-) go on the reaction side of the equation? If so, can someone explain why?

2e- 2Hg^+2--> Hg2

briannam_1F

Hello, I understand that n is a the number of moles of electron being transferred in a redox reaction, but I can't understand why for question 6L.1 part a) the value of n=2.
For the half reaction I got 2Ce(4+)-->2Ce(+3) + 1e but I can't figure balance 3I- --> I(3)-

briannam_1F

How is Cl2 acting as both a oxidizing and reducing agent? Also, why does the half-reaction Cl2(g) --> 2Cl-, where did the Cl- come from?

briannam_1F

Can someone explain why in example 6L.2 when writing the reacting for a cell Pt(s) │ H2(g) │ HCl(aq) │ Hg2Cl2(s) │ Hg(l) the oxidation is written as
1/2 H2( g ) --> H+( aq) + 2e- ? Is the reason HCL not used because it's highly acidic and will dissociate completely?

briannam_1F

Can anyone recommend any additional resources on Thermodynamics? I feel like I have a general idea but consuming more information would be a great benefit for me! Thanks in advance!

briannam_1F

Can someone share the acronym that was shared during the review session to remember what our state functions are?

briannam_1F

What's a defining factor of q (heat) and w (work)?

briannam_1F

How do we use equilibrium constants to predict solubility?

briannam_1F

My friend and I are having trouble understanding the homework question 6C.13.

Can someone please clarify what the question is asking? We were given pKa and we decided from the question to solve for pKb, but now were are unsure what these values mean and how we should rank them.

Thanks in advance!

briannam_1F

I'm confused has to why Q=K when Q is supposed to representative of a system that has not yet reached equilibrium?

briannam_1F

When solving for Q do we omit solids and pure liquids, like when solving for K?

briannam_1F

When calculating for Q do we omit solids and pure liquids as well?

briannam_1F

Can someone further explain why we leave out solids and liquids when calculating K?

briannam_1F

What atom was it exactly that was displaced by cisplatunum.

briannam_1F

Are we going to be tested on the different types of acids?

briannam_1F

Are we going to need to know fac and mer isomers as well as cis and trans?

briannam_1F

Some questions on the homework gave us longer molecules to determine their molecular geometry, how do we go at doing so if they aren't our typical PCl₅?

briannam_1F

What is teller when deciding if a molecule is linear or angular.

briannam_1F

Also, an important note to remember is that as the mass increases them the wave-length of the mass gets smaller.

briannam_1F

This was a topic that was in a reading (under Topic 1D), but I can't remember if it was discussed in lecture and also there wasn't any homework problems regarding this topic. Is this something that we are going to need to know for any exams? If so, is this something that can be brought up during dis...

briannam_1F

Can you use De Broglie’s equation to find the wavelength in regards to electrons?

briannam_1F

Are we going to be expected to know how to write the formula for something like "magnesium sulfate heptahydrate," for example, for the test in our discussions? Or will we just be given chemical symbols?

CHEMISTRY COMMUNITY

Search found 35 matches

Re: Kc vs Kp

Understanding Entropy

Re: Cathode and Anode

Re: Pt in Cell Diagram

Ecell Potential

Re: What do each orders mean

Differential rate law

Electromotive force

Ideal gas

Delta S total

Acids and Basis: Salts

Inert Metals

6N.9 Homework

6M.5

Calculating the value of n (6L.1)

6K.3 D)

Example 6L.2

Additional resources: Thermodynamics

State Functions

Differentiating (q) and (w)

equilibrium constants and solubility

pKa of conjugate acid relating to strength of base

Q=K

Understanding Q

Understanding Q

Solids and Liquids

Biological Function

Difference

Fac and Mer isomers

Understanding longer molecule VSPER shapes.

Differentiation

Re: When to use the DeBroglie equation?

Probability of finding an electron at a certain location

Re: De Broglie's Equation

Re: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]