Question
Information about some silver compounds is shown.
Which equation shows a reaction which cannot be used to make a silver salt?
A. \(AgNO_{3}(aq)+HC\imath (aq)\rightarrow AgC\imath (s)+HNO_{3}(aq)\)
B. \(Ag_{2}O(s)+2HNO_{3}(aq)\rightarrow 2AgNO_{3}(aq)+H_{2}O(l)\)
C. \(Ag_{2}CO_{3}(s)+2HNO_{3}(aq)\rightarrow 2AgNO_{3}(aq)+H_{2}O(l)+CO_{2}(g)\)
D. \(2Ag(s)+2HC\imath (aq)\rightarrow 2AgC\imath (s)+H_{2}(g)\)
Answer/Explanation
Ans:
D
Question
An acid is neutralized by adding an excess of an insoluble solid base.
A soluble salt is formed.
How is the pure salt obtained from the reaction mixture?
- crystallization → evaporation → filtration
- evaporation → crystallization → filtration
- filtration → crystallization → evaporation
- filtration → evaporation → crystallization
Answer/Explanation
Ans:
D
Question
Copper(II) chloride crystals are made by adding solid copper(II) carbonate to dilute
hydrochloric acid until no more dissolves.
Which process is used to obtain pure copper(II) chloride crystals from the mixture?
A distillation of the mixture
B evaporation of the mixture
C filtration followed by drying of the residue
D filtration followed by evaporation of the filtrate
Answer/Explanation
Ans: D
Question
The following substances can be reacted together to prepare salts.
1 copper(II) oxide and excess hydrochloric acid
2 hydrochloric acid and excess sodium hydroxide
3 hydrochloric acid and excess zinc carbonate
In which reactions can the excess reactant be separated from the solution by filtration?
A 1 and 2 B 1 and 3 C 2 and 3 D 3 only
Answer/Explanation
Ans: D