CHEMISTRY COMMUNITY

Mandeep Garcha 2H

Pt(s) is added to either the anode or cathode (or even both) when there is no solid metal conductor present.

Mandeep Garcha 2H

When you write and balance the half-reactions, the mols of electrons (should be balanced to be the same in both equations) is the number you use as n in the equation.

Mandeep Garcha 2H

Q=anode/cathode. So you can plug in all the values you know for the equation and solve for the unknown.

Mandeep Garcha 2H

When there isn't a sold metal conductor in the anode or cathode, you need to add Pt(s) to it.

Mandeep Garcha 2H

Since the outline says you should be able to derive the equation, I would recommend it. Also, it isn't given on the constants sheet so it is a good thing to know. During a step-up session one of the UA's said that they had to derive the equation on their final.

Mandeep Garcha 2H

5G (13, 15, 17, 19,21), 5J (11,13,15), 5.55, and 5.61 .

Mandeep Garcha 2H

Anything in the second page in outline 4 and all of outline 5 can be on the test.

Mandeep Garcha 2H

Cathode is the reaction that is reduced (gains electron/mass) and anode is the reaction that is oxidized (loses electron/mass).

Mandeep Garcha 2H

Test 2 covers the second page of outline 4 and all of outline 5.

Mandeep Garcha 2H

It depends on the UA. I know that some have said in week 8 sessions that they will be going over test material during the week 9 sessions. However, it is most likely the sessions that are earlier on in the week like Monday and Tuesday.

Mandeep Garcha 2H

Lavelle does not have any extra credit opportunities. However, the 100 points for doing the homework and chemistry community are an opportunity to get "easy" points to cushion your grade.

Mandeep Garcha 2H

It depends on the TA and their office hours so I would go ahead and email your TA to work something out.

Mandeep Garcha 2H

I just wanted ti share a diagram that helped me differentiate between the two!

Link: https://i.pinimg.com/originals/df/8e/6e ... 30c443.jpg

Mandeep Garcha 2H

In a redox reaction, reduction is when it gains electrons and oxidation is when it loses electrons. OIL RIG can help you remember it. Oxidation Is Loss of electrons. Reductions Is Gain of electrons.

Mandeep Garcha 2H

I am unsure, but I think it is unlikely as it was given out in the beginning of January. However, you can try to email your TA from last quarter to see if they still have it or can give it to you.

Mandeep Garcha 2H

You should have made 50 posts by the end of the quarter. The grades for these posts are all most together at the end of the quarter.

Mandeep Garcha 2H

Gibbs free energy is one of the easiest ways to determine whether a reaction is spontaneous or not. A negative delta G is spontaneous (exergonic) and a positive delta G is not spontaneous (endergonic).

Mandeep Garcha 2H

Pressure and volume are inversely related (when volume increases, pressure decreases, and vice versa). Therefore, it is P1/P2 and V2/V1.

Mandeep Garcha 2H

To pass the class with a C- you need 250 points. He does not curve individual tests, but he may adjust grades at the end of the quarter depending on the overall class grades.

Mandeep Garcha 2H

When you balance an equation and it has fractions, you must multiply the whole reaction with a whole number to get rid of the fractions.

Mandeep Garcha 2H

From my experience with him in 14A, the tests are much more straightforwards while the midterm/final are much longer and have more application type problems. Also, it includes more conceptual questions. They are much more difficult, in my opinion.

Mandeep Garcha 2H

My TA stated that we will not have to know how to derive the equations.

Mandeep Garcha 2H

The equation sheet that will be on the midterm is on Lavelle's website, so if you see any that are important that aren't on there you should memorize them! Also, you should be able to apply the equations that are given.

Mandeep Garcha 2H

The midterm covers everything up until Fridays lecture (2/7), which is Outlines 1, 2 , 3, and 4. But only the first page of four and the first set of problems (focus 4).

Mandeep Garcha 2H

The worksheet is posted under "pizza rolls" and the review session will take place on Sunday February 9 from 2-5 pm at Moore 100.

Mandeep Garcha 2H

It depends on the units given in the problem.

Mandeep Garcha 2H

I have only received partial credit in the past if it was very close to the actual answer.

Mandeep Garcha 2H

Exothermic reaction: - increasing the temp will favor formation of reactants
- decreasing the temp will favor formation of products

Mandeep Garcha 2H

I have not been to his office hours, but the UA sessions are very helpful. I like attending the step-up sessions the most, I feel that they help a lot.

Mandeep Garcha 2H

The R constant is given on the sheet of constants and equations for the test, so you will not need to memorize it( but familiarize yourself with it).

Mandeep Garcha 2H

When you are given K(Kc, Ka, Kb, etc.) and need to find the equilibrium concentrations of the molecules, you use the ICE table to find the unknown equilbrium concentrations.

Mandeep Garcha 2H

The midterm is week 6, Wednesday February 12 from 6-8.

Mandeep Garcha 2H

If temperature is increased during an exothermic reaction, the formation of reactants is favored. If temperature is increased during an endothermic reaction, the formation of products is favored.

Mandeep Garcha 2H

We are going to be covering outline 4 this week, so homework should be based on that.

Mandeep Garcha 2H

I believe he said in a lecture that Chem 14b doesn't have lewis structures.

Mandeep Garcha 2H

Yes, homework is still due and it should be on acids and bases.

Mandeep Garcha 2H

The test will focus on everything stated in outlines 1 and 2.

Mandeep Garcha 2H

I think homework 3 should be focus on acids and bases.

Mandeep Garcha 2H

There are no practice tests that he hands out, but the homework problems stated in the outlines really help to prepare for the test.You may be able to ask older students for tests.

Mandeep Garcha 2H

You got it right. A pH lower than 7 is acidic, a pH higher than 7 is basic, and a pH that is equal to 7 is neutral.

Mandeep Garcha 2H

I feel that doing ALL of the homework problems assigned are the most helpful because they allow you to know what your strong and weak points are, and how to solve the problems.

Mandeep Garcha 2H

I would do all of the problems listed in outlines 1 and 2 to really master all of the material.

Mandeep Garcha 2H

None of his lectures are bruincasted, the only way to get notes you missed is from a friend.

Mandeep Garcha 2H

I believe the test will cover chemical equilibrium up to acids and bases (outlines 1 and 2).

Mandeep Garcha 2H

You can do homework for chemical equilibrium this week, just make sure you don't use the same problems as last week! Also, you can do problems from acids and bases.

Mandeep Garcha 2H

If K is larger than 10^3, the mixture contains mostly products. If K is less than 10^-3, the mixture contains mostly reactants. If K is about equal to 1, the reaction will reach equilibrium as an intermediate mixture, meaning the amounts of products and reactants will be about the same. Also, here's...

Mandeep Garcha 2H

I would recommend getting the 7th edition because the problems can be quite different in the 6th edition. Also, my TA today had said that he thinks we should all have the 7th edition because they have completely transitioned from the 6th edition to the newer one.

Mandeep Garcha 2H

This image helped to understand better.

https://image.slidesharecdn.com/chemica ... 1331539456

Mandeep Garcha 2H

Sapling learning is just an extra resource to help you, but it does not count toward any grade and is not mandatory.

Mandeep Garcha 2H

The first homework assignment is due on Friday (tomorrow) to your TA after lecture. All other homework assignments after week 1 are due in your discussion section.

Mandeep Garcha 2H

I would focus on the concepts in all of the outlines only.

Mandeep Garcha 2H

Lyndon's session is Friday December 6 at 7:30-10pm in Haines 39.

Mandeep Garcha 2H

I find it helpful to skip through and find the questions I know how to do first and then come back to the ones I am confused about because you slowly start recalling the material as times goes on.

Mandeep Garcha 2H

The only way to get his class notes are to ask a friend for them.

Mandeep Garcha 2H

I would recommend going over the notes, completing the homework problems, reviewing past tests (including the midterm), and attending the review sessions that professor has setup.

Mandeep Garcha 2H

single bond: 1 sigma, 0 pi
double bond: 1 sigma, 1 pi
triple bond: 1 sigma, 2 pi

Mandeep Garcha 2H

The final covers the topics of the entire class, it is cumulative.

Mandeep Garcha 2H

single bond: 1 sigma, o pi
double bond: 1 sigma, 1 pi
triple bond: 1 sigma, 2 pi

Mandeep Garcha 2H

If it is like the midterm, I assume we will not learn anything new on the last lecture before the final.

Mandeep Garcha 2H

The larger the molar mass, the higher the boiling point.

Mandeep Garcha 2H

The test covers up until sigma and pi bonds, which he covered in the beginning of lecture today.

Mandeep Garcha 2H

A is the central atom, X is the attached atoms, and E is the lone pairs.

Mandeep Garcha 2H

They have been saying bent, but the book says angular so I think either would work.

Mandeep Garcha 2H

The dipoles in the linear CO2 cancel each other out, making it non-polar. The visual: https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&ved=2ahUKEwj8vpSevvXlAhXN6Z4KHQVOCCQQjRx6BAgBEAQ&url=https%3A%2F%2Fwww.quora.com%2FIs-CO2-non-polar&psig=AOvVaw0jUwo...

Mandeep Garcha 2H

Just to make sure, hybridization is not on the test right?

Mandeep Garcha 2H

Homework for week 7 should be on the chemical bonds outline because it was the last thing we learned before the midterm, specifically focus 3F.

Mandeep Garcha 2H

It should cover topics that we learn after the midterm.

Mandeep Garcha 2H

I think it's okay to put the number next to the atom because that's what a lot of the TAs did during discussion and review sessions.

Mandeep Garcha 2H

I believe the homework is the section of chemical bonds because that's we ended with before the midterm.

Mandeep Garcha 2H

I would say it is on the section of chemical bonds because that's what we ended with before the midterm.

Mandeep Garcha 2H

Professor Lavelle told us to primarily look at the s-block, p-block, and first row of d-block for this class, so I wouldn't worry too much about it.

Mandeep Garcha 2H

There will be 8 questions for the 2-hour midterms, but I am positive that they will all have multiple parts like the practice problems we have seen.

Mandeep Garcha 2H

4s comes before the 3d on the periodic table, which is why you might want to write the electron configuration in that order. However, we have been told write it out in order of the energy of the subshells (low-high energy).

Mandeep Garcha 2H

There are no lectures on the day of the midterm, Wednesday 11/6/19. However, they did not clarify if there is discussion or not.

Mandeep Garcha 2H

Everything up to Focus 2D and last Friday's lecture will be on the midterm.

Mandeep Garcha 2H

The homework due this week in discussion is on the section of chemical bonds.

Mandeep Garcha 2H

Delocalization occurs when electric charge is spread over more than one atom. Benzene is a good example of this:
https://www.chemicool.com/images/benzen ... alized.png.

Mandeep Garcha 2H

Nodal planes are the area around atomic nuclei where the probability of finding electrons is zero.

Mandeep Garcha 2H

Classes are cancelled today. As for evacuation, the alerts say that the fire is not a threat to campus as of now.

Mandeep Garcha 2H

Metals can only give electrons (e-) to nonmetals.

Mandeep Garcha 2H

I would say to balance the element that occurs the least and work your way up to the one that occurs the most. And always remember to double check that you successfully balanced the equation without any mistakes because it is easy to accidentally ignore an element.

Mandeep Garcha 2H

We are supposed post 5 times a week for 5 points. The posts are due by Sunday every week to get the full points.

Mandeep Garcha 2H

I believe my TA said that we do not need to be too concerned with drawing the different orbitals, but I am still familiarizing myself with them just in case.

Mandeep Garcha 2H

I find it helpful to focus on the quantum world homework for now, as we barely started the topic of chemical bonds.

Mandeep Garcha 2H

It completely depends on what unit you are converting to/from but you would use a find the conversion for one unit, multiply your number by the conversion fraction, and cancel out the units.

Mandeep Garcha 2H

Personally, the textbooks readings are only helpful to me when I am stuck on a homework problem. Other than that, the modules, homework problems, and lecture notes help me better.

Mandeep Garcha 2H

Only tests 1 and 2 are administered in our discussion sessions. The midterm and final will not. The midterm is Wednesday November 6 6-8 pm and the final is Sunday December 8 11:30 am -2:30 pm.

Mandeep Garcha 2H

I have been using those modules for additional help too! Unfortunately, I think that there aren't anymore after these. The only ones online are from the past section and some of this section.

Mandeep Garcha 2H

Personally, doing the online modules, reading the book, and doing all of the homework problems listed in the outline have helped me the best.

Mandeep Garcha 2H

As stated on the syllabus there are 2 tests, 1 midterm, and 1 final. We have already taken one test. The midterm is on Wednesday, November 6 from 6-8 pm. Test 2 is starting Tuesday, November 19 in discussion session. The final is Sunday, December 8 from 11:30 am-2:30 pm.

Mandeep Garcha 2H

No, for this test all you need to bring is a pen and a SCIENTIFIC calculator. They will provide the test, a periodic table, and list of constants.

Mandeep Garcha 2H

They will give a list of constants and a periodic table.

Mandeep Garcha 2H

I have seen both textbooks and the problems are more or less the same, but I would play it safe and just get the 7th edition to make sure that you are doing the correct homework problems for full credit.

Mandeep Garcha 2H

I did all of the problems that were listed in the outline and I felt that it allowed me to understand the topics better.

Mandeep Garcha 2H

The test covers the topics that Dr. Lavelle has included in his outline:

https://lavelle.chem.ucla.edu/wp-conten ... ciples.pdf

Mandeep Garcha 2H

Professor Lavelle used this picture:
http://cdn.antarcticglaciers.org/wp-con ... curacy.png
on his powerpoint which I felt was very helpful in understanding the difference between the two.

Mandeep Garcha 2H

I would recommend not rounding the number and using the exact number from the periodic table to get the most accurate answer.

Mandeep Garcha 2H

I'm in a similar situation, I have not taken chemistry since my sophomore year of high school and this is my first year of college. However, I think using ALL of the resources we have available to us is imperative. Professor Lavelle has mentioned that there are 32 hours of assistance each week and y...

Mandeep Garcha 2H

Even though we only have to turn in five questions, I think it is good practice to do most of the other problems.

Mandeep Garcha 2H

When using the empirical formula do we always assume that the sample mass is 100g?

Search found 100 matches