Using your knowledge of the Brønsted-Lowry theory, which of the following correctly describes ammonia?
neutral
acid
base
amphoteric
Question 2
Marks: 1
In the Brønsted–Lowry theory of acids and bases, the difference between a conjugate acid and its conjugate base is the presence of which of the following?
a positive charge
a pair of electrons
a proton
a hydrogen atom
Question 3
Marks: 1
Which of the following ions or compounds is amphiprotic?
P4O10
PO43−
HCO3−
Al2O3
Question 4
Marks: 1
In the following reaction, identify which two species are acting asBrønsted–Lowry acids
H3PO4 (aq) + OH− (aq) ⇋ H2PO4− (aq) + H2O (l)
H2PO4− (aq) and OH− (aq)
H3PO4 (aq) and H2PO4− (aq)
H2PO4− (aq) and H2O (l)
H3PO4 (aq) and H2O (l)
Question 5
Marks: 1
Potassium hydrogen carbonate reacts vigorously with dilute sulfuric acid. Identify the correct formulas of the substances produced in the reaction
K2SO4 + H2O + CO2
K2SO4 + CO2
KSO4 + H2O + CO2
KSO4 + H2CO3
Question 6
Marks: 1
Copper(II) sulfate can be made by the reaction between dilute sulfuric acid and which of the following?
Cu
CuO
CuCO3
I and II only
I and III only
II and III only
I, II and III
Question 7
Marks: 1
Which statement is correct for the following equation?
HSO4- (aq) + OH- (aq) ⇌ SO4- (aq) + H2O (l)
OH- and H2O are an acid and conjugate base pair
SO4- is acting as Brønsted–Lowry acid
HSO4-and SO4- are a base and conjugate acid pair
OH- and H2O are a base and conjugate acid pair
Question 8
Marks: 1
Which row shows the correct acid and base needed to make the salt specified?
Acid
Base
Salt
A
NaHCO3
SO2
Na2SO4
B
HNO3
SO3
(NH4)2SO4
C
H2SO4
ZnO
ZnSO3
D
H2SO4
NH4OH
(NH4)2SO4
Question 9
Marks: 1
Which is a conjugate acid-base pair?
HCO3- (aq) + H2O (l) ⇌ CO32- (aq) + H3O+ (aq)
HCO3- / H3O+
HCO3- / CO32-
H2O / CO32-
HCO3- / H2O
Question 10
Marks: 1
Which coefficients balance the following acid-base equation?
