Search found 35 matches

by briannam_1F
Tue Mar 17, 2020 10:57 pm
Forum: Ideal Gases
Topic: Kc vs Kp
Replies: 43
Views: 512

Re: Kc vs Kp

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.
by briannam_1F
Tue Mar 17, 2020 10:50 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: Understanding Entropy
Replies: 1
Views: 134

Understanding Entropy

Can someone explain why Lavelle didn't like to say define entropy as "disorder?"
by briannam_1F
Tue Mar 17, 2020 9:35 pm
Forum: Balancing Redox Reactions
Topic: Cathode and Anode
Replies: 16
Views: 362

Re: Cathode and Anode

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."
by briannam_1F
Tue Mar 17, 2020 9:16 pm
Forum: Balancing Redox Reactions
Topic: Pt in Cell Diagram
Replies: 10
Views: 169

Re: Pt in Cell Diagram

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).
by briannam_1F
Tue Mar 17, 2020 9:13 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Ecell Potential
Replies: 2
Views: 71

Ecell Potential

What changes would result in changes in the Ecell potential?
by briannam_1F
Sun Mar 15, 2020 7:52 am
Forum: Zero Order Reactions
Topic: What do each orders mean
Replies: 3
Views: 61

Re: What do each orders mean

How is the denotation for the three versions different?
by briannam_1F
Sun Mar 15, 2020 7:43 am
Forum: General Rate Laws
Topic: Differential rate law
Replies: 1
Views: 55

Differential rate law

When are we expected to use the differential rate law?
by briannam_1F
Sat Mar 14, 2020 12:46 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Electromotive force
Replies: 2
Views: 18

Electromotive force

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.
by briannam_1F
Fri Mar 13, 2020 9:32 pm
Forum: Calculating Work of Expansion
Topic: Ideal gas
Replies: 4
Views: 181

Ideal gas

What should we be thinking about when we come across "ideal gas?"
by briannam_1F
Fri Mar 13, 2020 9:10 pm
Forum: Concepts & Calculations Using Second Law of Thermodynamics
Topic: Delta S total
Replies: 3
Views: 87

Delta S total

What's the method to calculate doe total entropy?
by briannam_1F
Tue Mar 10, 2020 10:34 pm
Forum: Ideal Gases
Topic: Acids and Basis: Salts
Replies: 9
Views: 120

Acids and Basis: Salts

How does one calculate the pH of a weak acid and its salt?
by briannam_1F
Thu Mar 05, 2020 2:31 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Inert Metals
Replies: 4
Views: 36

Inert Metals

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)?
by briannam_1F
Tue Mar 03, 2020 1:33 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 6N.9 Homework
Replies: 1
Views: 32

6N.9 Homework

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...
by briannam_1F
Sun Mar 01, 2020 11:18 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 6M.5
Replies: 2
Views: 25

6M.5

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
by briannam_1F
Sat Feb 29, 2020 11:45 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Calculating the value of n (6L.1)
Replies: 2
Views: 36

Calculating the value of n (6L.1)

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)-
by briannam_1F
Sat Feb 29, 2020 10:19 pm
Forum: Balancing Redox Reactions
Topic: 6K.3 D)
Replies: 2
Views: 38

6K.3 D)

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?
by briannam_1F
Thu Feb 27, 2020 2:26 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Example 6L.2
Replies: 1
Views: 36

Example 6L.2

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?
by briannam_1F
Thu Feb 27, 2020 12:15 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: Additional resources: Thermodynamics
Replies: 5
Views: 141

Additional resources: Thermodynamics

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!
by briannam_1F
Wed Feb 12, 2020 4:34 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: State Functions
Replies: 4
Views: 139

State Functions

Can someone share the acronym that was shared during the review session to remember what our state functions are?
by briannam_1F
Sun Jan 26, 2020 11:12 pm
Forum: Phase Changes & Related Calculations
Topic: Differentiating (q) and (w)
Replies: 4
Views: 35

Differentiating (q) and (w)

What's a defining factor of q (heat) and w (work)?
by briannam_1F
Wed Jan 22, 2020 9:12 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: equilibrium constants and solubility
Replies: 1
Views: 57

equilibrium constants and solubility

How do we use equilibrium constants to predict solubility?
by briannam_1F
Mon Jan 20, 2020 4:25 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: pKa of conjugate acid relating to strength of base
Replies: 2
Views: 39

pKa of conjugate acid relating to strength of base

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!
by briannam_1F
Sun Jan 12, 2020 11:50 pm
Forum: Non-Equilibrium Conditions & The Reaction Quotient
Topic: Q=K
Replies: 14
Views: 130

Q=K

I'm confused has to why Q=K when Q is supposed to representative of a system that has not yet reached equilibrium?
by briannam_1F
Wed Jan 08, 2020 10:23 pm
Forum: Ideal Gases
Topic: Understanding Q
Replies: 19
Views: 176

Understanding Q

When solving for Q do we omit solids and pure liquids, like when solving for K?
by briannam_1F
Wed Jan 08, 2020 2:06 pm
Forum: Ideal Gases
Topic: Understanding Q
Replies: 13
Views: 109

Understanding Q

When calculating for Q do we omit solids and pure liquids as well?
by briannam_1F
Wed Jan 08, 2020 2:02 pm
Forum: Ideal Gases
Topic: Solids and Liquids
Replies: 7
Views: 98

Solids and Liquids

Can someone further explain why we leave out solids and liquids when calculating K?
by briannam_1F
Sun Dec 08, 2019 10:08 pm
Forum: Biological Examples
Topic: Biological Function
Replies: 2
Views: 105

Biological Function

What atom was it exactly that was displaced by cisplatunum.
by briannam_1F
Sun Dec 01, 2019 11:59 pm
Forum: Lewis Acids & Bases
Topic: Difference
Replies: 4
Views: 80

Difference

Are we going to be tested on the different types of acids?
by briannam_1F
Sun Nov 24, 2019 7:53 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Fac and Mer isomers
Replies: 2
Views: 24

Fac and Mer isomers

Are we going to need to know fac and mer isomers as well as cis and trans?
by briannam_1F
Sun Nov 17, 2019 10:30 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Understanding longer molecule VSPER shapes.
Replies: 3
Views: 43

Understanding longer molecule VSPER shapes.

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?
by briannam_1F
Sun Nov 10, 2019 10:24 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Differentiation
Replies: 1
Views: 28

Differentiation

What is teller when deciding if a molecule is linear or angular.
by briannam_1F
Sun Nov 03, 2019 5:29 pm
Forum: DeBroglie Equation
Topic: When to use the DeBroglie equation?
Replies: 6
Views: 93

Re: When to use the DeBroglie equation?

Also, an important note to remember is that as the mass increases them the wave-length of the mass gets smaller.
by briannam_1F
Sun Oct 20, 2019 11:19 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Probability of finding an electron at a certain location
Replies: 4
Views: 59

Probability of finding an electron at a certain location

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...
by briannam_1F
Sun Oct 13, 2019 11:20 pm
Forum: DeBroglie Equation
Topic: De Broglie's Equation
Replies: 13
Views: 154

Re: De Broglie's Equation

Can you use De Broglie’s equation to find the wavelength in regards to electrons?
by briannam_1F
Mon Oct 07, 2019 12:35 am
Forum: Limiting Reactant Calculations
Topic: Showing Work for Limiting Reactant Calculations on Tests [ENDORSED]
Replies: 68
Views: 3880

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

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?

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