09 Salts, Set A To print: Ctrl + P, paper A4, margins Default.
Learners' AlleyDesigned by Khow Willard
09

Salts

Set AFoundations
Name
Time 45 minutes
Total 20 marks

Use a copy of the Periodic Table where you need one.

A

From the lesson

6 marks
1

Which salt is insoluble in water?

Aammonium sulfate
Blead(II) nitrate
Csilver chloride
Dsodium carbonate
Answer [1]

Source: Learners' Alley, Salts slides

2

Which method is best for preparing potassium sulfate?

Apotassium metal with dilute sulfuric acid
Bexcess potassium carbonate with dilute sulfuric acid, then filter
Ctitration of aqueous potassium hydroxide with dilute sulfuric acid
Dprecipitation from two solutions
Answer [1]

Source: Learners' Alley, Salts slides

3

Answer these questions about salts.

(a)
Name two insoluble sulfates.
[1]
(b)
Why is the solid added in excess when a salt is made from an acid and an insoluble base?
[1]
(c)
Which method is used to make sodium chloride, and from which reagents?
[1]
(d)
Write the ionic equation, with state symbols, for the precipitation of barium sulfate.
[1]

Source: Learners' Alley, Salts slides

B

Practice

14 marks
4

Which of the following pairs of reagents should be mixed to prepare a sample of lead(II) sulfate salt?

Alead metal and sulfuric acid
Blead(II) carbonate and sulfuric acid
Clead(II) chloride and barium sulfate
Dlead(II) nitrate and sodium sulfate
Answer [1]

Source: 2023 GESS Sec 3 End-of-Year P1 Q32

5

When preparing a salt by titration, the experiment is usually repeated without the indicator after the volume needed for neutralisation has been found. Why is the indicator left out when preparing the salt crystals?

AThe indicator acts as a drying agent and removes moisture from the crystals.
BThe indicator is an impurity and will lead to impure crystals.
CThe indicator slows down crystal formation during crystallisation.
DThe indicator will dye and change the original colour of the crystals.
Answer [1]

Source: 2023 GESS Sec 3 End-of-Year P1 Q33

6

Which of the following does not show suitable reagents for preparing the named salt?

saltreagents
Acopper(II) sulfatecopper(II) carbonate + sulfuric acid
Blead(II) nitratelead(II) oxide + nitric acid
Cmagnesium chloridemagnesium nitrate + hydrochloric acid
Dzinc chloridezinc hydroxide + hydrochloric acid
Answer [1]

Source: 2024 SMSS Sec 3 End-of-Year P1 Q13

7

How can a pure sample of lead(II) sulfate be obtained from lead(II) carbonate?

AAdd lead(II) carbonate directly to dilute sulfuric acid, filter the mixture and wash the residue.
BAdd lead(II) carbonate directly to dilute sulfuric acid, filter the mixture and crystallise the filtrate.
CAdd lead(II) carbonate to dilute nitric acid, then add dilute sulfuric acid, filter the mixture and wash the residue.
DAdd lead(II) carbonate to dilute nitric acid, then add dilute sulfuric acid, filter the mixture and crystallise the filtrate.
Answer [1]

Source: 2024 SMSS Sec 3 End-of-Year P1 Q15

8

Titration of an acid against a base is a method often used in the preparation of salts. Which properties of the acid, the base and the salt are required if this method is to be used?

acidbasesalt
Ainsolubleinsolubleinsoluble
Bsolubleinsolubleinsoluble
Csolublesolubleinsoluble
Dsolublesolublesoluble
Answer [1]

Source: 2023 XMS Sec 3 WA3 Q3

9

Salt ST is to be prepared by reacting the carbonate of S with the acid HT using titration. What are the solubilities of the carbonate, the acid and the salt?

carbonate of Sacid HTsalt ST
Ainsolublesolubleinsoluble
Binsolublesolublesoluble
Csolubleinsolubleinsoluble
Dsolublesolublesoluble
Answer [1]

Source: 2023 HYSS Sec 3 End-of-Year P1 Q9

10

An excess of barium chloride solution is added to a solution of magnesium sulfate and a white precipitate is formed. The mixture is then filtered. Which solution would not produce a precipitate when added to the filtrate?

Airon(II) sulfate
Bpotassium nitrate
Csilver nitrate
Dsodium carbonate
Answer [1]

Source: 2024 SMSS Sec 3 End-of-Year P1 Q16

11

Darren wants to prepare a pure, dry sample of zinc nitrate. He decides to use zinc oxide and nitric acid.

Using these reactants, describe the steps Darren must carry out to obtain a pure, dry sample of zinc nitrate.
[3]

Source: Woodlands Prelim P2 Q(b)

12

The table shows information about the preparation of pure samples of two solid salts.

saltreagents usedmethod used to prepare the saltmethod used to obtain the solid from the reaction mixture
potassium chloride1: dilute hydrochloric acid
2: ..........		..........crystallisation
lead(II) sulfate1: dilute sulfuric acid
2: ..........		precipitation..........
Complete the table by filling in the missing information.
[4]

Source: 2024 CHS Sec 3 End-of-Year Section B Q6(a)