Questions of the Day Set #11
#122
N2 (g) + O2 (g)  NO2 (g)
If the pressure on the system decreases, the equilibrium will shift to the ___ and the [NO2] will ___.
(A) left; increase
(B) left; decrease
(C) right; increase
(D) right; decrease
#124
What is the conjugate base of NH3?
(A) NH4+1
(B) NH2-1
(C) NO3-1
(D) NO2-1
#126
Which substance can be classified as an Arrhenius acid?
(A) HCl
(B) NaCl
(C) LiOH
(D) KOH
#128
An aqueous solution that has a hydrogen ion concentration of 1.0 x 10-9 M has a pH of
(A) 5, which is basic
(B) 5, which is acidic
(C) 9, which is basic
(D) 9, which is acidic
#130
How are the boiling and freezing points of a sample of water affected when salt is dissolved in the water?
* The boiling point ___ and the freezing point ___. *
(A) decreases; increases
(B) increases; decreases
(C) increases; increases
(D) decreases; decreases
#132
Which substance would be classified as containing the highest concentration of hydroxide ions?
Substance
pH
Ammonia
11.9
Drain cleaner
13.5
Hand soap
10.1
Lemon juice
2.3
Vinegar
3.0
Water
6.8
(A) ammonia
(B) drain cleaner
(C) lemon juice
(D) vinegar