Acids & Salts (Triple) quiz

1. What is an acid?

An acid is a corrosive substance

An acid is a green solution

An acid is a compound that reacts with metals

An acid is a source of hydrogen ions, H⁺

Question 1 of 21

2. What is a base?

A source of hydroxide ions, OH⁻

An unreactive form of an alkali that is used to store it

A compound that reacts with an acid to form hydrogen

A substance which can neutralise an acid, forming salt and water only

Question 2 of 21

3. acid + metal →

acid + metal → salt + water + carbon dioxide

acid + metal → salt + hydrogen

acid + metal → salt + water

acid + metal → salt + hydrogen + oxygen

Question 3 of 21

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

Combustion method

Titration method

Excess solid method

Precipitation method

Question 4 of 21

5. What is the universal indicator colour of a pH 7 (neutral) solution?

Purple

Yellow

Red

Green

Question 5 of 21

6. In the test of a gas, a lit splint gives a squeaky pop. What is the gas?

Carbon dioxide

Chlorine

Hydrogen

Oxygen

Question 6 of 21

7. What is defined as a proton acceptor?

An acid

An alkali

A base

An ore

Question 7 of 21

8. If copper chloride has the formula CuCl₂, what is the formula of the copper ion?

Cu²⁺

Cu²⁻

Cu⁺

Cu⁻

Question 8 of 21

9. 7.485 g of a hydrated copper(II) sulphate CuSO₄.xH₂O was heated producing 4.785g of anhydrous copper(II) sulphate. What is the formula of the hydrated salt?

CuSO₄.5H₂O

CuSO₄.4H₂O

CuSO₄.7H₂O

CuSO₄.10H₂O

Question 9 of 21

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

Na⁺

Li⁺

K⁺

Cu²⁺

Question 10 of 21

11. Is magnesium oxide acidic or basic?

Acidic

Neutral

Depends on the conditions

Basic

Question 11 of 21

12. Give the name of the green precipitate formed when sodium hydroxide is added to a solution containing Fe²⁺

iron (II) oxide

iron (III) hydroxide

iron (III) oxide

iron (II) hydroxide

Question 12 of 21

13. With universal indicator, what is the pH of a red solution?

8-10

12-14

0-3

4-7

Question 13 of 21

14. 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 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) 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) 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 14 of 21

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

To speed up the reaction

To increase the concentration of the acid

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

To boil the acid

Question 15 of 21

16. An acid is called a proton _________

An acid is a proton donor

An acid is a proton solvent

An acid is a proton sink

An acid is a proton acceptor

Question 16 of 21

17. Is lead chloride soluble?

slightly

yes

no

Question 17 of 21

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

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 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 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.

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.

Question 18 of 21

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

To clean the wire of any unwanted ions

To dissolve insoluble salts

To make the colour of the flame more obvious

To protect the wire from melting

Question 19 of 21

20. When testing a sample for ions, nitric acid is added to a sample and then bubbles are seen. What ions have been shown to be present?

chloride ions (Cl⁻)

sulfate ions (SO₄²⁻)

bromide ions (Br⁻)

carbonate ions (CO₃²⁻)

Question 20 of 21

21. 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) 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.

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) Filter using filter paper and funnel. 4) Wash with distilled water. 5) Dry by leaving in a warm place.

Question 21 of 21

Acids & Salts (Triple) quiz

Related Posts:

Share This Story, Choose Your Platform!