Acids & Salts (Triple) quiz

1. Can a base neutralise an acid?

Only if it is more reactive than hydrogen

No

Yes

Sometimes

Question 1 of 21

2. What is the universal indicator colour of a pH 8-10 solution?

Red

Green

Blue

Yellow

Question 2 of 21

3. Describe the test for bromide ions

Add dilute nitric acid and silver nitrate and see if a cream precipitate of silver bromide is formed.

Add nitric acid and see if carbon dioxide bubbles form

Add dilute HCl, followed by barium chloride (BaCl₂) and see if a white precipitate forms

Add dilute nitric acid and silver nitrate and see if a yellow precipitate of silver bromide is formed.

Question 3 of 21

4. 1.170 g of CoCl₂.xH₂O gave a residue of 0.641 g on heating. Find x.

5

3

6

7

Question 4 of 21

5. When NaOH is added to a sample, the resultant gas turns damp red litmus paper blue. What cation was present in the sample?

Calcium (II), Ca²⁺

Ammonium, NH₄⁺

Potassium (I), K⁺

Copper (II), Cu²⁺

Question 5 of 21

6. When preparing hydrated copper(II) sulfate crystals starting from copper(II) oxide, why is the acid gently heated?

To ensure all the acid has reacted so there is no acid left

To increase the concentration of the acid

To speed up the reaction

To boil the acid

Question 6 of 21

7. Describe an experiment to prepare a pure, dry sample of an insoluble salt, starting from two soluble reactants

1) Mix the two salt solutions together in a beaker. 2) Stir with glass rod. 3) Filter using filter paper and funnel. 4) Wash with distilled water. 5) Dry by leaving in a warm place.

1) Mix the two salt solutions together in a beaker. 2) Stir with glass rod. 3) Pour away the liquid 4) Wash with one of the original solutions. 5) Dry by leaving in a warm place.

1) Mix the two salt solutions together in a beaker. 2) Stir with glass rod. 3) Pour away the liquid 4) Wash with distilled water. 5) Dry by leaving in a warm place.

1) Mix the two salt solutions together in a beaker. 2) Stir with glass rod. 3) Filter using filter paper and funnel 4) Wash with one of the original solutions. 5) Dry by leaving in a warm place.

Question 7 of 21

8. Is zinc sulfate soluble?

no

yes

slightly

Question 8 of 21

9. Describe the method to prepare a pure dry sample of sodium chloride (soluble salt)

1) Pipette 25cm³ of sodium hydroxide into a conical flask. 2) Add indicator. 3) (Using titration values)Titrate the known volume hydrochloric acid into conical flask containing alkali. 4) Transfer to an evaporating basin. 5) Heat the solution until a hot saturated solution forms. 6) Allow the solution to cool so that hydrated crystals form. 7) Remove the crystals by filtration and wash with distilled water. 8) Dry by leaving in a warm place.

1) Heat hydrochloric acid in a beaker. 2) Add sodium oxide until excess and stir with glass rod. 3) Filter the mixture using filter paper and funnel. 4) Heat the filtered solution (filtrate) until a hot saturated solution forms. 5) Allow the solution to cool so that hydrated crystals form. 6) Remove the crystals by filtration and wash with distilled water. 7) Dry by leaving in a warm place.

1) Heat hydrochloric acid in a beaker. 2) Add an equal amount of sodium oxide and stir with glass rod. 3) Filter the mixture using filter paper and funnel. 4) Heat the filtered solution (filtrate) until a hot saturated solution forms. 5) Allow the solution to cool so that hydrated crystals form. 6) Remove the crystals by filtration and wash with distilled water. 7) Dry by leaving in a warm place.

1) Pipette 25cm³ of sodium hydroxide into a conical flask. 2) Do not add indicator. 3) (Using titration values)Titrate the known volume hydrochloric acid into conical flask containing alkali. 4) Transfer to an evaporating basin. 5) Heat the solution until a hot saturated solution forms. 6) Allow the solution to cool so that hydrated crystals form. 7) Remove the crystals by filtration and wash with distilled water. 8) Dry by leaving in a warm place.

Question 9 of 21

10. A gas is bubbled through limewater and the limewater goes cloudy. Identify the gas.

Hydrogen

Ammonia

Oxygen

Carbon dioxide

Question 10 of 21

11. Is iron (III) hydroxide acidic or basic?

Basic (as metal hydroxides are basic)

Depends on the conditions

Acidic (as metal hydroxides are acidic)

Neutral (as metal hydroxides are neutral)

Question 11 of 21

12. An acid is called a proton _________

An acid is a proton sink

An acid is a proton acceptor

An acid is a proton donor

An acid is a proton solvent

Question 12 of 21

13. State the formula of the ammonium ion

NH₄⁻

NH₃⁻

NH₃⁺

NH₄⁺

Question 13 of 21

14. What method would be followed to prepare a sample of pure, dry lead (II) sulfate?

Excess solid method

Precipitation method

Combustion method

Titration method

Question 14 of 21

15. In a flame test, why is hydrochloric acid used?

To dissolve insoluble salts

To protect the wire from melting

To clean the wire of any unwanted ions

To make the colour of the flame more obvious

Question 15 of 21

16. What is defined as a proton donor?

A base

An alkali

An ore

An acid

Question 16 of 21

17. Describe the method to prepare a pure dry sample of copper sulfate (soluble salt)

1) Heat acid in a beaker. 2) Add base until excess and stir with glass rod. 3) Filter the mixture using filter paper and funnel. 4) Heat the filtered solution (filtrate) until a hot saturated solution forms. 5) Allow the solution to cool so that hydrated crystals form. 6) Remove the crystals by filtration and wash with distilled water. 7) Dry by leaving in a warm place.

1) Heat acid in a beaker. 2) Add an equal amount of base and stir with glass rod. 3) Filter the mixture using filter paper and funnel. 4) Heat the filtered solution (filtrate) until a hot saturated solution forms. 5) Allow the solution to cool so that hydrated crystals form. 6) Remove the crystals by filtration and wash with distilled water. 7) Dry by leaving in a warm place.

1) Heat acid in a beaker. 2) Add an equal amount of base and stir with glass rod. 3) Filter the mixture using filter paper and funnel. 4) Heat the filtered solution (filtrate) until a hot saturated solution forms. 5) Filter and wash with distilled water. 7) Dry by leaving in a warm place.

1) Heat acid in a beaker. 2) Add base until excess and stir with glass rod. 3) Filter the mixture using filter paper and funnel. 4) Heat the filtered solution (filtrate) until a hot saturated solution forms. 5) Filter and wash with distilled water. 7) Dry by leaving in a warm place.

Question 17 of 21

18. In a flame test, a lilac colour is seen. Give the formula of the cation which is present.

Li⁺

Cu²⁺

K⁺

Na⁺

Question 18 of 21

19. With universal indicator, what is the pH of a purple solution?

8-10

4-7

11-14

0-3

Question 19 of 21

20. acid + metal carbonate →

acid + metal carbonate → salt + carbon dioxide + water

acid + metal carbonate → salt + hydrogen + carbon dioxide

acid + metal carbonate → salt + carbon dioxide

acid + metal carbonate → salt + water

Question 20 of 21

21. What is an acid?

An acid is a green solution

An acid is a compound that reacts with metals

An acid is a source of hydrogen ions, H⁺

An acid is a corrosive substance

Question 21 of 21

Acids & Salts (Triple) quiz

Related Posts:

Share This Story, Choose Your Platform!