Chem 1412 homework chap15
1. In the reaction
A)
B)
C)
D)
2.
A)
B)
C)
D)
, _____.
HPO42– is a conjugate acid
HPO42– is a conjugate base
NH3 is an acid
NH4+ is a conjugate base
The pH of 2.8 x 10–4 M Ba(OH)2 will be _____.
10.45
3.55
9.86
10.75
3. The hydrogen concentration of a solution having a pH 16 is _____.
A) 1  10 –2 M
B) 1  10 –16 M
C) 0
D) 1  10 –14 M
4. The pOH of a solution is 9.40. Its hydrogen ion concentration is _____.
A) 2.5  10 –3 M
B) 2.5  10 –5 M
C) 1.5  10 –5 M
D) 2.5  10 –9 M
5. The weakest acid below is _____.
A) HCl
B) HClO4
C) HF
D) HNO3
6. Which of the following statements is true with respect to the reaction below?
A)
B)
C)
D)
The reaction favors the formation of F–(aq).
F– is a stronger base than OH–.
Hydrofluoric acid is a weaker acid than water.
The reaction favors the formation of HF(aq).
7. 0.056 g of CH3COOH (Ka = 1.8  10–5) is dissolved in enough water to obtain 50.0 mL
of solution. The concentration of H+ in the solution is _____.
A) 1.8  10–4 M
B) 1.8  10–3 M
C) 5.8  10–3 M
D) 5.8  10–4 M
8. The pH of a 0.30 M solution of a weak base is 10.66. What is the Kb of the base?
A) 4.8  10–10
B) 1.85  10–5
C) 7.0  10–8
D) 7.1  10–7
A)
B)
C)
D)
9. The correct order of the strength of the acids below is _____.
H2SeO4 > H2SO4
H2SO4 > H2SeO4
H3PO4 < H3AsO4
HClO > HClO4
10.
A)
B)
C)
D)
The pH of a 0.36 M CH3COONa solution will be _____.
8.15
7.00
11.15
9.15
11. An aqueous solution of K2HPO4 will be _____.
A) basic
B) acidic
C) neutral
D) amphoteric
12. An example of an acidic oxide is _____.
A) CaO
B) Al2O3
C) N2O5
13.
In the reaction:
A)
B)
C)
D)
Cl– acts as a Lewis acid.
AlCl3 acts as a Lewis base.
Cl– acts as a Lewis base.
AlCl4 –acts as a Lewis acid.