Search found 43 matches

by Rucha Kulkarni 2A
Sat Mar 17, 2018 10:50 am
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: 14.83
Replies: 1
Views: 62

14.83

Does anyone know how to solve question 14.83?
by Rucha Kulkarni 2A
Sat Mar 17, 2018 10:48 am
Forum: Balancing Redox Reactions
Topic: 14.119
Replies: 1
Views: 150

14.119

Does anyone know how to solve question 14.119?
by Rucha Kulkarni 2A
Sun Mar 11, 2018 12:16 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: 9.99
Replies: 1
Views: 79

9.99

Does anyone know how to solve exercise 9.99?
by Rucha Kulkarni 2A
Sun Mar 11, 2018 12:15 pm
Forum: Biological Examples
Topic: 15.105
Replies: 1
Views: 193

15.105

Does anyone know how to solve exercise 15.105?
by Rucha Kulkarni 2A
Sun Mar 11, 2018 12:09 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: 15.71
Replies: 1
Views: 76

15.71

Does anyone know how to solve exercise 15.71?
by Rucha Kulkarni 2A
Sun Mar 04, 2018 10:07 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: 15.69
Replies: 2
Views: 98

15.69

Does anyone know how to solve question 15.69?
by Rucha Kulkarni 2A
Sun Mar 04, 2018 10:07 pm
Forum: Reaction Mechanisms, Reaction Profiles
Topic: 15.47
Replies: 1
Views: 68

15.47

Does anyone know how to solve question 15.47?
by Rucha Kulkarni 2A
Sun Mar 04, 2018 10:06 pm
Forum: First Order Reactions
Topic: 15.23
Replies: 6
Views: 231

15.23

Does anyone know how to solve question 15.23?
by Rucha Kulkarni 2A
Sun Feb 25, 2018 10:36 pm
Forum: First Order Reactions
Topic: 15.37
Replies: 2
Views: 90

15.37

Does anyone know how to solve exercise 15.37?
by Rucha Kulkarni 2A
Sun Feb 25, 2018 10:35 pm
Forum: Arrhenius Equation, Activation Energies, Catalysts
Topic: 15.67
Replies: 1
Views: 56

15.67

Does anyone know how to solve exercise 15.67?
by Rucha Kulkarni 2A
Sun Feb 25, 2018 10:33 pm
Forum: General Rate Laws
Topic: 15.29
Replies: 1
Views: 80

15.29

Does anyone know how to solve exercise 15.29?
by Rucha Kulkarni 2A
Sun Feb 18, 2018 7:51 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Platinum electrodes
Replies: 4
Views: 129

Platinum electrodes

When exactly are platinum electrodes used?
I assumed that it was whenever there wasn't a solid metal involved in the reaction; however there are some questions in the textbook where a platinum electrode is used even when a solid metal is present.
by Rucha Kulkarni 2A
Sun Feb 18, 2018 7:48 pm
Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
Topic: Exercise 14.31
Replies: 2
Views: 115

Exercise 14.31

Does anyone know how to solve exercise 14.31?
by Rucha Kulkarni 2A
Sun Feb 18, 2018 7:46 pm
Forum: Balancing Redox Reactions
Topic: Exercise 14.17
Replies: 6
Views: 176

Exercise 14.17

Does anyone know how to solve exercise 14.17?
by Rucha Kulkarni 2A
Sun Feb 11, 2018 10:30 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Exercise 14.55 part b
Replies: 1
Views: 70

Exercise 14.55 part b

Does anyone know how to solve part b of exercise 14.55?
by Rucha Kulkarni 2A
Sun Feb 11, 2018 10:28 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Exercise 14.87
Replies: 1
Views: 66

Exercise 14.87

Does anyone know how to solve question 87 on the homework?
by Rucha Kulkarni 2A
Sun Feb 04, 2018 8:32 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Exercise 9.63
Replies: 2
Views: 128

Exercise 9.63

Does anyone know how to solve exercise 9.63 on the homework?
by Rucha Kulkarni 2A
Sun Feb 04, 2018 8:30 pm
Forum: Entropy Changes Due to Changes in Volume and Temperature
Topic: Exercise 9.75
Replies: 1
Views: 61

Exercise 9.75

Does anyone know how to solve exercise 9.75 on the homework?
by Rucha Kulkarni 2A
Sun Feb 04, 2018 8:24 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Spontaneous Reactions and Relation to Delta G°
Replies: 1
Views: 70

Re: Spontaneous Reactions and Relation to Delta G°

Delta G is negative for spontaneous reactions.
If you see the equation for delta G: delta G(system)=delta H(system)-T*delta S
The sign for delta G is the opposite for delta S of the system
And since delta S has to be positive for spontaneous, delta G is negative.
by Rucha Kulkarni 2A
Sun Jan 21, 2018 8:31 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Exercise 8.29
Replies: 1
Views: 91

Exercise 8.29

Does anyone know the explanation for 8.29 on the homework?
by Rucha Kulkarni 2A
Sun Jan 21, 2018 7:30 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: 8.67
Replies: 2
Views: 142

8.67

Where exactly is the enthalpy of sublimation value for carbon used in this question?
by Rucha Kulkarni 2A
Sun Jan 21, 2018 7:27 pm
Forum: Thermodynamic Systems (Open, Closed, Isolated)
Topic: Exercise 8.19
Replies: 1
Views: 129

Exercise 8.19

Does anyone know how to solve exercise 8.19 from the textbook?
by Rucha Kulkarni 2A
Sun Jan 14, 2018 8:08 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Q 8.67
Replies: 2
Views: 155

Q 8.67

Does anyone know how to solve exercise 8.67 from the homework?
by Rucha Kulkarni 2A
Sun Jan 14, 2018 8:04 pm
Forum: Phase Changes & Related Calculations
Topic: kJ vs. kJ/mol
Replies: 3
Views: 355

kJ vs. kJ/mol

When do we use kJ/mol for enthalpy? Is kJ only when moles aren't specified or whenever you're calculating the overall reaction enthalpy?
by Rucha Kulkarni 2A
Sun Dec 10, 2017 12:19 am
Forum: Amphoteric Compounds
Topic: Amphoteric compounds
Replies: 3
Views: 522

Re: Amphoteric compounds

I think it's just the oxides of all the metals in the list he gave us during the lecture: Be, Al, Ga, Sn, Sb and Pb.
by Rucha Kulkarni 2A
Sun Dec 10, 2017 12:15 am
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Significant figures in calculations
Replies: 1
Views: 184

Significant figures in calculations

When calculating concentrations, how many significant figures do we use in the answer? Is it the same number of figures as the Kc value?
by Rucha Kulkarni 2A
Sun Dec 03, 2017 9:19 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: 11.117
Replies: 2
Views: 166

11.117

Does anyone know how to solve exercise 11.117 for the equilibrium chapter?
by Rucha Kulkarni 2A
Sun Dec 03, 2017 3:22 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Dentates
Replies: 6
Views: 262

Re: Dentates

Then do you count the number of lone pairs or just the number of atoms having lone pairs?
Like would H2O be monodentate or bidentate?
by Rucha Kulkarni 2A
Sun Nov 26, 2017 11:10 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Reaction constant
Replies: 4
Views: 272

Reaction constant

For a particular reaction, if it isn't specified whether the constant is Kc or Kp do we just assume that they mean Kc?
by Rucha Kulkarni 2A
Mon Nov 20, 2017 2:49 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Homework Q17.37
Replies: 2
Views: 129

Homework Q17.37

For part c and d of this question, the coordination number of the central metal depends upon the chelating compound. Are we required to know the chelating compounds and how many bonds they form, or will this information be given to us on the exam?
by Rucha Kulkarni 2A
Sun Nov 12, 2017 11:38 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Book Questions 4.1&4.2
Replies: 4
Views: 132

Re: Book Questions 4.1&4.2

I think it depends on the bond angles? For example, for part a on the first question, the molecule has a bond angle of 120, which should mean a trigonal planar, or basically 3 electron domains around the central atom. The diagram only shows 2 bonded pairs (which would otherwise be bond angle 180) so...
by Rucha Kulkarni 2A
Sun Nov 12, 2017 12:50 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Bond angles for molecules with lone pairs
Replies: 1
Views: 94

Bond angles for molecules with lone pairs

So there's a bunch of bond angle values for when molecules have different numbers of lone pairs. Will we be required to know these?
by Rucha Kulkarni 2A
Sun Nov 05, 2017 6:09 pm
Forum: Octet Exceptions
Topic: Expanded Octet Max
Replies: 2
Views: 172

Re: Expanded Octet Max

I'm not sure about the second question, but I don't think there's a maximum number of bonds in expanded octet? Because it just depends on the next available empty orbital.
Sorry I couldn't answer the other question!
by Rucha Kulkarni 2A
Sun Nov 05, 2017 3:16 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Formal charge and lewis structures
Replies: 5
Views: 209

Formal charge and lewis structures

When drawing Lewis structures, do we need to find all the possible structures and draw the one which is most stable, or will the basic, most obvious Lewis structure suffice?
(for example, the SO2 structure)
by Rucha Kulkarni 2A
Sun Oct 29, 2017 3:18 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: 2.29
Replies: 2
Views: 199

2.29

Is there a specific method to solving this question?
How many electrons can have the following quantum numbers in an atom: (a) n =2, l = 1; (b) n =4, l = 2,
ml = -2; (c) n = 2; (d) n = 3, l = 2, ml = -1?
by Rucha Kulkarni 2A
Sat Oct 28, 2017 5:51 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: d orbital [ENDORSED]
Replies: 2
Views: 179

Re: d orbital [ENDORSED]

Because minimum energy level for d-orbital is 3, when n=3 the values for l begin from zero i.e. l=0,1,2. (Where l=2 is the d-orbital)
So you'd have to fill up the 3d orbital at lower energy level before you move to the 4d orbital.
by Rucha Kulkarni 2A
Sun Oct 22, 2017 2:25 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Angular Momentum Quantum Number [ENDORSED]
Replies: 3
Views: 203

Re: Angular Momentum Quantum Number [ENDORSED]

How exactly does angular momentum differ from l?
by Rucha Kulkarni 2A
Sat Oct 21, 2017 5:11 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Electric Spin
Replies: 5
Views: 221

Re: Electric Spin

I don't think it matters for unpaired electrons; it just says that paired electrons should have the opposite spin numbers.
by Rucha Kulkarni 2A
Sat Oct 14, 2017 3:07 pm
Forum: Photoelectric Effect
Topic: Conversions for units in work function [ENDORSED]
Replies: 2
Views: 161

Conversions for units in work function [ENDORSED]

So in some of the solved examples as well as homework questions, the work function is given as eV or keV, where it has to be converted to Joules.
Will the values for these conversions be given to us on the test, or do we need to know them?
by Rucha Kulkarni 2A
Sun Oct 08, 2017 11:26 am
Forum: Photoelectric Effect
Topic: Units for photoelectric effect
Replies: 2
Views: 184

Units for photoelectric effect

Hey, does anyone know all the proper units for the equations in the photoelectric effect?
by Rucha Kulkarni 2A
Thu Oct 05, 2017 12:51 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: E1
Replies: 2
Views: 422

E1

The solutions manual wasn't very clear about this question... Question: The field of nanotechnology offers some intriguing possibilities, such as the creation of fibers one atom wide. Suppose you were able to string together 1.00 mol Ag atoms, each of radius 144 pm, into one of these fibers by encap...

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