CHEMISTRY COMMUNITY

Jade Bowman 1A

The answer to part a in the book says that the name of the cycloalkene is 5-methylcyclopenta-1,3-diene. Can you also write the name like 5-methyl-1,3-cyclopentadiene?

Jade Bowman 1A

How can I tell which half-reaction will be the cathode and which will be the anode?

Jade Bowman 1A

I'm confused as to why the Au³⁺ is put into a half reaction involving Au when they are both products of the overall reaction, Au⁺(aq)---------->Au(s)+Au³⁺(aq).

Jade Bowman 1A

For part a of this question, how do you figure out that O₃ is the oxidizing agent and Br^- is the reducing agent? The redox equation is O₃(aq)+Br^-(aq)--------->O₂(g)+BrO₃^-(aq).

Jade Bowman 1A

Can someone explain this further? I don't really understand this answer.

Jade Bowman 1A

You don't need to divide the 2NO₂ by 2 because the final reaction you get is N₂(g)+2O₂(g)------> 2NO₂. This is a balanced equation, so the net enthalpy is 68 kJ.

If you wanted to find the enthalpy per mol of NO₂, then you would divide 68kJ by 2.

Jade Bowman 1A

The standard enthalpy for propane is given, -2220. kJ/mol. We can see that this is the amount of kJ needed to heat a mole of propane. So in order to find the mass of propane need to supply 2580 kJ of heat you need to divide 2580kJ by 2220. kJ/mol to obtain the moles of propane needed, \frac{2580kJ}{...

Jade Bowman 1A

Can someone explain which equation(s) you need to use for this question and why?

Jade Bowman 1A

How do I know that the temperature for the equation PV=nRT is 298K in this problem?

Jade Bowman 1A

For question 31, how do you find the heat capacity of Kr at a constant pressure and then at a constant volume?

Jade Bowman 1A

Can someone explain further when and why the pressure for work of expansion is negative/postitive?

Jade Bowman 1A

For this problem we're supposed to find the K of HNO_{2}+NH_{3}\rightarrow NH_{4}^{+}+NO_{2}^{-} . In the solution manual it sets K= \frac{[NH_{4}^{+}][NO_{2}^{-}]}{[HNO_{2}][NH_{3}]} = \frac{K_{a}(HNO_{2})K_{a}(NH_{3})}{K_{w}} . How do we know that the Ka of HNO2 multiplied by the K...

Jade Bowman 1A

How do you find the value of $K_{a}_{2}$ ? It's in the solution manual, but I can't find it in the book.

Jade Bowman 1A

In the first reaction, H_{2}SO_{4} + H_{2}O\rightarrow HSO_{4}^{-} + H_{3}O^{+} , H_{2}SO_{4} goes through a complete ionization forming the hydronium ion H_{3}O^{+} and HSO_{4}^{-} , like a strong acid completely deprotonates. Because it goes through complete ionization we can assume that the initi...

Jade Bowman 1A

For this problem you're supposed to use table 12.1 and 12.2 to place the four acids in order of increasing strengths, but only two of the $pK_{a}$ values for two of the acids are in the tables. How can do you determine the other two $pK_{a}$ values?

Jade Bowman 1A

Can someone explain how increasing/decreasing the pressure will affect the equilibrium?

Jade Bowman 1A

Since the equilibrium constant for autoprotolysis of water is K_{c}=\frac{[H_{3}O^{+}][OH^{-}]}{[H_{2}O]^{2}}=[H_{3}O^{+}][OH^{-}]=K_{W} which is equal to 1.0X10^-14, we can say that the H+ and OH- ions are inversely related since Kw is a constant. We can then take the -log of each side which can be...

Jade Bowman 1A

So how would you determine what the value of x is? Is the new equilibrium for Br2 4.9-x and for Cl2 7.6-x?

Jade Bowman 1A

How can you determine how many binding sites a ligand has?

Jade Bowman 1A

I understand that the H-Atom equation only works with hydrogen atoms, but can I use the Rydberg equation for hydrogen as well? Is there any time that using the H-Atom equation makes more sense or would be easier/more accurate to use?

Jade Bowman 1A

I understand using the Rydberg equation to complete this problem, but I am confused about how the solution manual determined that the fifth line in the spectrum should be n[sub]2=7. Is this just a memorized value that is listed in the book?

CHEMISTRY COMMUNITY

Search found 21 matches

Intro to Organic Chemistry Question 1.21

Anode and Cathode

14.13 part D

Question 14.5

Re: Residual Entropy

Re: Moles in Hess's Law

Re: Enthalpy and Mass Question

Quiz 1 Prep Winter 2015 Q 10

Question 8.49

Question 8.31

-P vs P

Problem 12.117

Finding Ka2 in problem 12.79

Re: HW # 12.79

Problem 12.39

Increasing/Decreasing Pressure

Re: The pOH of Solutions

Re: 2013 Quiz 3 Preparation #10

Ligand Binding Sites

Rydberg vs H-Atom Equation

Question about problem 1.57