How does the strength of London forces change with increasing molecular weight? Explain briefly.

1.What is the shape of water?
2.What is autoionization, and how is it important for water?
3.Name the three non-covalent forces discussed in this module.
4.What type of non-covalent interaction is known as the strongest
dipole-dipole force?
5.Would the following be a hydrogen donor or acceptor? Or both?
6.How does the strength of London forces change with increasing molecular weight? Explain briefly.
7.Calculate the pH of a solution containing 0.12 M of OH- .
8.If a solution contains 0.00023M of H+, then what is the OH – concentration?
9.If a solution contains 1.67 x 10-8 M OH – , then what is H + concentration?
10.A solution contains H+ at a concentration of 1.67 x 10-6 M. Is
the solution acidic, basic, or neutral? Explain briefly.
11.What is the concentration, in M, of water as a pure liquid?
12.Define Keq and K w .
13.Identify the acid, conjugate base, and proton in the following reaction.
14.A buffer system has a pKa of 8.5. What is its effective buffering range?
15.A buffer system has [H +] = 1.2 x 10 -6 , [A – ] = 1.2 x 10 -6 , and [HA] = 3.2 x
10 -5 . What is its corresponding Ka value?
16.A buffer system has [H +] = 1.2 x 10 -6 , [A – ] = 1.2 x 10 -6 , and
[HA] = 3.2 x 10 -5 . What is its corresponding Ka value?
17.Ice melts at room temperature. What is the sign for
Δ
G in this reaction?
18.Butane combusts in the air by the following reaction:
C 4 H 10 (l) + 6.5 O2 (g)
⟶
4 CO 2 (g) + 5 H 2 O (g)
What is the sign (+ or -) of
Δ
G,
Δ
H, and
Δ
S in this reaction?
19.
What is the role of ATP in helping a non-spontaneous reaction occur?