Acids & Salts (Triple) quiz

1. An alkali is called a proton _________

An alkali is a proton sink

An alkali is a proton donor

An alkali is a proton acceptor

An alkali is a proton solvent

Question 1 of 21

2. A pure, dry sample of an insoluble salt can be prepared starting with two soluble reactants. What is this method called?

Crystallisation method

Titration method

Precipitation method

Neutralisation method

Question 2 of 21

3. In a flame test, a blue-green colour is seen. Give the formula of the cation which is present.

Ca²⁺

Li⁺

K⁺

Cu²⁺

Question 3 of 21

4. What 2 things are added to a solution to test for chloride ions? What is observed if they are present?

Add dilute nitric acid and silver nitrate. A white precipitate of silver chloride is formed.

Add dilute hydrochloric acid and silver nitrate. A white precipitate of silver chloride is formed

Add dilute nitric acid and barium chloride. A white precipitate of silver chloride is formed

Add dilute hydrochloric acid and barium chloride. A white precipitate of silver chloride is formed

Question 4 of 21

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

To boil the acid

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

Question 5 of 21

6. 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?

CuSO₄.4H₂O

CuSO₄.5H₂O

CuSO₄.10H₂O

CuSO₄.7H₂O

Question 6 of 21

7. What is defined as a proton donor?

An ore

A base

An acid

An alkali

Question 7 of 21

8. Can a base neutralise an acid?

No

Yes

Sometimes

Only if it is more reactive than hydrogen

Question 8 of 21

9. In the test of a gas, a glowing splint relights. What is the gas?

Carbon dioxide

Hydrogen

Chlorine

Oxygen

Question 9 of 21

10. Is aluminium chloride soluble?

slightly

no

yes

Question 10 of 21

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

Combustion method

Precipitation method

Titration method

Excess solid method

Question 11 of 21

12. State the formula for the iron (III) ion

Fe³⁻

Fe²⁻

Fe²⁺

Fe³⁺

Question 12 of 21

13. Give the name of the substance which has formula HNO₃

nitric hydride

nitric acid

ammonia

ammonium nitrate

Question 13 of 21

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

8-10

11-14

4-7

0-3

Question 14 of 21

15. 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) 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) 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 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.

Question 15 of 21

16. What is an alkali compared to a base?

Alkalis are bases that are soluble in water

Alkalis are anything with a pH above 7. Bases are only metal oxides

Both alkalis and bases have pH greater than 7 but only alkalis are corrosive

Alkalis have higher pHs than bases

Question 16 of 21

17. Describe how you would carry out a flame test

Dissolve solid in acid. Put solution onto wire. Put into an orange flame

Put solid onto a wire. Put into an orange flame

Dissolve solid in acid. Put solution onto wire. Put into an blue flame

Put solid onto a wire. Put into a blue flame

Question 17 of 21

18. What is the universal indicator colour of a pH 4-6 solution?

Red

Purple

Yellow

Green

Question 18 of 21

19. A pure, dry sample of a soluble salt can be prepared starting from an acid and alkali. What are the two stages of this method called?

Combustion then crystallisation

Titration then crystallisation

Neutralisation then precipitation

Neutralisation then filtration

Question 19 of 21

20. What is an acid?

An acid is a corrosive substance

An acid is a compound that reacts with metals

An acid is a source of hydrogen ions, H⁺

An acid is a green solution

Question 20 of 21

21. When NaOH is added to a sample, a brown precipitate forms. What cation was present in the sample?

Iron (II), Fe²⁺

Calcium (II), Ca²⁺

Potassium (I), K⁺

Iron (III), Fe³⁺

Question 21 of 21

Acids & Salts (Triple) quiz

Related Posts:

Share This Story, Choose Your Platform!