Search found 13 matches

by Shruti Amin 1E
Fri Mar 17, 2017 4:43 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Cis vs trans
Replies: 1
Views: 193

Re: Cis vs trans

Yes, because they are opposite from eachother therefore they won't be bumping into eachother or causing strain or anything.
by Shruti Amin 1E
Fri Mar 17, 2017 4:43 pm
Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
Topic: Cis Trans
Replies: 3
Views: 598

Re: Cis Trans

Cis is the same side, and trans is opposite sides. You have to look at the two highest priority groups. So for example, if you are looking at a double bond and the two highest priority groups (most complex molecules) are on the same side (both up) or both down, then it is Cis. Trans is across from e...
by Shruti Amin 1E
Sun Mar 12, 2017 7:55 pm
Forum: *Constitutional and Geometric Isomers (cis, Z and trans, E)
Topic: Geometric isomers as line structures
Replies: 4
Views: 393

Re: Geometric isomers as line structures

Hi!!!!!!!!!!!!!!!!!!!!!!!!

If the two highest priority groups are on the same side, then it's a cis geometric isomer.

If the two highest priority groups are on opposite sides, then it is a trans geometric isomer.

Page 16 in the Green textbook thingy at the bottom.
by Shruti Amin 1E
Mon Mar 06, 2017 1:16 pm
Forum: *Alkanes
Topic: Drawing/Labeling reaction profile
Replies: 3
Views: 310

Drawing/Labeling reaction profile

When drawing the diagram with the two bumps (TS 1 and TS2), how do you know if the reaction is going to be endothermic or exothermic? The reactants will be higher on the diagram than the products if it is exothermic, but how do I know if it's exothermic?

Is it based on how many bonds break/form?
by Shruti Amin 1E
Sun Mar 05, 2017 12:10 pm
Forum: Administrative Questions and Class Announcements
Topic: Quiz 2 Winter 2017
Replies: 160
Views: 14884

Re: Quiz 2 Winter 2017

For Quiz 2, does ln(A) represent the final concentration (what's left over) or does it represent the change in concentration, and then you would have to subtract from the original amount to get the final concentration?
by Shruti Amin 1E
Sun Mar 05, 2017 12:06 pm
Forum: *Electrophiles
Topic: BF3 and NF3
Replies: 2
Views: 770

Re: BF3 and NF3

Boron has an empty 2p orbital and a strong positive charge on the boron atom (because Fluorine is electronegative)

So yes, BF3 is an electrophile.

Unlike BF3, NF3 is a Lewis Base, and it won't accept electron pairs from other species.

That's my understanding of it, but I could be wrong.
by Shruti Amin 1E
Sun Feb 19, 2017 1:05 pm
Forum: Kinetics vs. Thermodynamics Controlling a Reaction
Topic: Calculating order for a reaction
Replies: 1
Views: 175

Re: Calculating order for a reaction

Hi, yes it's the reactants. 0th order: rate = k[A]^0 1st order: rate= k[A]^1 2nd Order: rate=k[A]^2 The overall order of the reaction can be found by adding the exponents of the reactants. Here's a Khan Academy video that helped me: https://www.khanacademy.org/science/chemistry/chem-kinetics/reactio...
by Shruti Amin 1E
Sat Feb 11, 2017 6:27 pm
Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
Topic: Midterm 2016 Question 8B [ENDORSED]
Replies: 5
Views: 455

Midterm 2016 Question 8B [ENDORSED]

On Question 8B on the 2016 Midterm, the answer says the potential of the cell would increase, because Cadmium ions are taken out of the solution, and the equilibrium will favor the products, driving the reaction forward.

Why does the cell potential increase when the reaction is driven forward?
by Shruti Amin 1E
Sun Feb 05, 2017 12:27 pm
Forum: Galvanic/Voltaic Cells, Calculating Standard Cell Potentials, Cell Diagrams
Topic: Oxidation/Reaction Question
Replies: 2
Views: 187

Re: Oxidation/Reaction Question

Another phrase that might help you remember is

LEO says GER

Losing Electrons = oxidation.

Gaining Electrons = Reduction.

Hope this helps too!
by Shruti Amin 1E
Sun Jan 29, 2017 4:01 pm
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Bond Enthalpy [ENDORSED]
Replies: 2
Views: 331

Re: Bond Enthalpy [ENDORSED]

My TA said that it might be easier to just break all the bonds and reform all the bonds. Its been working for me so far and it's a lot easier to remember. Also this is the only case where its reactants - products instead of the other way around.
by Shruti Amin 1E
Sun Jan 29, 2017 3:55 pm
Forum: Gibbs Free Energy Concepts and Calculations
Topic: Quiz 1 Study Group
Replies: 1
Views: 187

Re: Quiz 1 Study Group

hi me and meghna duh
by Shruti Amin 1E
Sun Jan 22, 2017 3:37 pm
Forum: Concepts & Calculations Using First Law of Thermodynamics
Topic: HW 8.41
Replies: 3
Views: 264

Re: HW 8.41

You would have to do it in several steps.

Q(ice) = Q(ice1) + Q(ice2)
Q(ice) + Q(water) = 0

To find Q(ice1) : (50g/18.02g)*(6.01x10^3 J/mol)
Q(ice2): m*Cwater*T

Q(water) = m*Cwater*T

You'd plug in the values using the Appendixes and then you should get your answer.
by Shruti Amin 1E
Sun Jan 15, 2017 1:17 pm
Forum: Phase Changes & Related Calculations
Topic: Phase Change
Replies: 3
Views: 297

Phase Change

What are the different equations for phase-change vs non-phase change when you're looking at the graph of temperature on heat? (Like, the sloped part of the graph vs the flat part of the graph?)

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