Some species may be classified as amphiprotic, some as amphoteric and some as both. Which of the following applies to HPO42−?
Amphiprotic but not amphoteric
Amphoteric but not amphiprotic
Amphiprotic and amphoteric
Neither amphiprotic nor amphoteric
The aromatic compound phenol, C6H5OH, behaves as a weak acid, due the presence of a hydroxyl group on the benzene ring. What is the correct formula of the conjugate base formed when phenol dissociates?
C6H4--OH
C6H5-OH2+
C6H5-O-
C6H6+-OH
What is the sum of the coefficients when the following acid-base equation is balanced?
_Al2(CO3)3 (s) + _HNO3 (aq) ⇌ _Al(NO3)3 (aq) + _H2O (l) + _CO2 (g)
6
7
14
15
Which of the following substances can be used to prepare magnesium sulfate by a neutralization reaction with dilute sulfuric acid?
I and II only
I and III only
II and III only
I, II and III
Phosphoric acid is a polyprotic acid and can produce amphiprotic species when it dissociates. Which of the following species is amphiprotic?
I and II only
I and III only
II and III only
I, II and III
Use the following reactions to answer the question below:
H2O (l) + F- (aq) ⇌ HF (aq) + OH- (aq)
H2O (l) + HNO3 (aq) → H3O+ (aq) + NO3- (aq)
H2O (l) + CO2 (g) ⇌ H2CO3 (aq)
H2O (aq) + NH3 (aq) ⇌ NH4OH (aq)
Which of the following statements is true?
HNO3 and H2O both act as acids once
H2O is shown acting as a Bronsted-Lowry acid only
H2O reacts as an acid twice
H2O is shown as a diprotic acid
Which species are Bronsted-Lowry acids in the reaction shown?
H2PO4− (aq) + CN- (aq) ⇌ HCN (aq) + HPO42− (aq)
HCN and H2PO4−
HCN and CN-
H2PO4− and HPO42−
HCN and HPO42−
Which of the following solutions will react with a strip magnesium ribbon?
Sodium hydrogencarbonate
Sodium hydrogensulfate
Ammonia
Limewater
Which substance reacts with ammonia but is not a Brønsted–Lowry acid?
HCl
CH3COOH
BF3
CF3COOH
Which row shows the correct systematic name of the acid?
|
|
Formula |
Name |
|
A |
HClO3 |
chloric(V) acid |
|
B |
H2SO3 |
hydrogensulfate(VI) acid |
|
C |
H3PO3 |
phosphoric(V) acid |
|
D |
HNO2 |
nitrous acid |
