Essential Chemistry for IGCSE - Making And Identifying Salts (Section 6)
1
What is the function of adding excess of one reactant when making a salt from the reaction of a metal with an acid?
Answer(A)
To ensure all the acid reacts.
2
What happens when carbon dioxide is bubbled through limewater?
Answer(B)
The limewater turns milky.
3
What is observed when sulfur dioxide gas is bubbled through limewater?
Answer(D)
The limewater remains clear.
4
Which of the following is used to determine the end point of a reaction in a titration?
5
What gas would produce a 'squeaky pop' sound when tested with a lit splint?
6
What happens when zinc reacts with hydrochloric acid?
Answer(A)
Hydrogen gas is produced.
7
What is formed when a metal reacts with an acid?
8
What is the expected result when testing for carbon dioxide with limewater?
Answer(B)
The limewater turns milky.
9
What is a correct way to prepare a salt through precipitation?
Answer(C)
Mixing two soluble salts.
10
When a solution of copper sulfate reacts with a solution of sodium hydroxide, what is formed?
11
Which of the following represents the correct order of procedures for making a soluble salt from a metal?
Answer(B)
Add acid to excess metal, filter excess metal, heat to evaporate water, cool and crystallize.
12
What is the role of an indicator during a titration?
Answer(D)
To show the end point of the reaction.
13
What is the function of the indicator in a titration?
Answer(C)
To show when the reaction is complete.
14
Which method can be used to make salts from metals?
Answer(C)
Reacting a metal with an acid
15
Which of the following methods can be used to make a salt?
Answer(A)
Reacting a metal with an acid
16
What happens when you add an excess of metal to an acid?
Answer(D)
The reaction continues until the acid is all used up.
17
Which of the following is NOT a method for making salts?
Answer(D)
Reacting two soluble salts
18
What is the name given to a reaction in which an acid reacts with a base?
