CHEMISTRY COMMUNITY

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As indicated in the name the F is attached to the second carbon atom in the parent chain. They count one methyl and ethyl group as part of the parent chain, hence why there is no dimethyl or diethyl. They start with 4-ethyl since the substituents must be alphabetized. Since they are treating the flu...

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Benzene has 6 hydrogens to go with the 6 carbons that give it its structure. A phenyl ring has 6 carbon atoms, but only 5 hydrogen atoms.

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In Pseudod-thermodynamics, isn't delta G always positive and delta S always negative as well?

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I believe in lecture Dr. Lavelle mentioned that there were two ways one could determine if a cell has strong voltage. I know he said one way was the inherent chemistry of the cell, but what was the other way that he mentioned in lecture? Or am I taking this completely out of context with what Dr. La...

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You must first determine which electrode is the cathode and which electrode is the anode. Since calculating cell potential involves subtracting the energy of the anode from the energy of the cathode, you can only flip the sign of the anode if the energy given is in negative voltage. That is why thos...

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For question 14.5a, O3 is given in aqueous form. However, in the solutions manual O3 is given as a gas. Why is this the case?

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When I was doing the calculations for this problem, I noticed that when the change in entropy was calculated, it was rounded to -256.3 kJ/mol. However, when I was inputting the values I got for the change in entropy and the change in enthalpy into the Gibbs Free Energy Equation, I noticed that in th...

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I was trying to solve this problem but did not know how to approach it. So I looked at the Solutions Manual, but I noticed that they had a negative sign in front of the qrev/T*time. Then, when they got the solution, the negative sign disappeared out of nowhere. Why is this the case for this problem?

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There is an error in the calculations for the answer in the Solutions Manual for 8.63c. In the Solutions Manual, it gives -417.5 kJ/mol as the standard enthalpy of formation for K2S(aq) when in Appendix 2A it shows that the standard enthalpy of formation for K2S(aq) is -471.5 kJ/mol. Which is the ri...

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We know to use these because we are given that the cylinder is filled with an ideal gas. This means that we must use gas constants that will convert our work from L.atm to Joules. The only gas constant that can cancel the L.atm out of the equation is 8.206*10^-2 L.atm.K^-1.mol^-1. However, this stil...

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This is a video on calculating the pH, pOH, and percentage deprotenation of weak acids and bases

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The constant Kw is used to determine Ka in 12.69a and Kb in 12.71. Why is this the case for these three problems but not for 12.69b? Does it have something to do with H2O being present in the acid itself in 12.69b [Al(H2O)6]3+?

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Wouldn't it also depend on what particular volume is being increased? For example, if the H2O were a liquid in this case, wouldn't it have no effect on the equilibrium since liquids and solids are not taken into account when calculating equilibrium constant and concentrations?

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You would know that it is III by combining the charge you get with the charge of the ligands to see if it produces the charge of the complex.

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The Roman numeral III is the oxidation state of the coordination compound. This is obtained by combining the charge outside of the brackets and with the charges of the ligands.

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Based off the table in the course reader, an anionic ligand seems to have a negative charge. Any ligand that does not have a negative charge is a neutral ligand, like H2O and NH3.

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What other unit conversions must be memorized for the exams in Chem 14A?

CHEMISTRY COMMUNITY

Search found 17 matches

Re: Intro to Organic Chem (Self Test 2.2B)

Re: Quiz 3 Preparation

Re: PseudoThermodynamics

Ways to Determine if a Cell Has Strong Voltage

Re: Calculating Cell Potential

Homework Problem 14.5

Solutions Manual 9.67b

Homework Problem 9.1

Error in Solutions Manual Calculation for 8.63c

Re: Question 8.9

Re: Weak Acids

HW Question 12.69 and 12.71

Re: how will equilibrium shift

Re: Naming the compounds

Re: Naming the compounds

Re: Anionic ligand?

Re: Do we need to memorize unit conversions? [ENDORSED]