Acids & Salts (Triple) quiz

1. What is defined as a proton donor?

A base

An acid

An ore

An alkali

Question 1 of 21

2. Is copper carbonate soluble?

slightly

yes

no

Question 2 of 21

3. acid + alkali →

acid + alkali → salt + hydrogen

acid + alkali → salt + hydrogen + oxygen

acid + alkali → salt + water

acid + alkali → salt + water + carbon dioxide

Question 3 of 21

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

Basic (as metal hydroxides are basic)

Acidic (as metal hydroxides are acidic)

Neutral (as metal hydroxides are neutral)

Depends on the conditions

Question 4 of 21

5. How are lithium ions identified, and what is the result?

Using a flame test. Flame colour is red

Using a flame test. Flame colour is green

Using sodium hydroxide. Precipitate is green

Using sodium hydroxide. Precipitate is blue

Question 5 of 21

6. Write a word equation for the reaction between sodium hydroxide and iron(II) sulfate

sodium hydroxide + iron(II) sulfate → iron (II) hydroxide + sodium sulfate

sodium hydroxide + iron(II) sulfate → iron (III) hydroxide + sodium sulfite

sodium hydroxide + iron (II) sulfate → iron (II) hydroxide + sodium sulfite

sodium hydroxide + iron(II) sulfate → sodium hydroxide + iron (II) sulfate

Question 6 of 21

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

Titration method

Precipitation method

Combustion method

Excess solid method

Question 7 of 21

8. When testing for halide ions, after silver nitrate is added to a sample a cream precipitate is formed. Give the formula of the anion present in the sample.

Br⁻

SO₄²⁻

CO₃²⁻

Cl⁻

Question 8 of 21

9. 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 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) 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.

Question 9 of 21

10. 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 speed up the reaction

To boil the acid

To increase the concentration of the acid

Question 10 of 21

11. 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?

Neutralisation then precipitation

Titration then crystallisation

Combustion then crystallisation

Neutralisation then filtration

Question 11 of 21

12. Describe the test for chlorine gas

Relights a glowing splint

Turns moist litmus paper white (bleaches)

Turns damp red litmus paper blue

Burns with a squeaky pop

Question 12 of 21

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

0-3

4-6

8-10

12-14

Question 13 of 21

14. What is a base?

A source of hydroxide ions, OH⁻

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

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

A compound that reacts with an acid to form hydrogen

Question 14 of 21

15. Describe how you would carry out a flame test

Put solid onto a wire. Put into a blue flame

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

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

Put solid onto a wire. Put into an orange flame

Question 15 of 21

16. What is an alkali?

An alkali is a colourless solution

An alkali is a source of hydroxide ions, OH⁻

An alkali is a corrosive substance

An alkali is a compound that reacts with metals

Question 16 of 21

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

Titration method

Crystallisation method

Precipitation method

Neutralisation method

Question 17 of 21

18. Work out the empirical formula of an oxide of chlorine contains 7.1 g of chlorine and 1.6 g of oxygen.

Cl₂O₂

Cl₂O

Cl₄O₂

Cl₄O

Question 18 of 21

19. If calcium carbonate has a Ca²⁺ ion, what is the formula for the other ion?

CaCO₃²⁻

C²⁻

O²⁻

CO₃²⁻

Question 19 of 21

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

Red

Green

Yellow

Blue

Question 20 of 21

21. An alkali is called a proton _________

An alkali is a proton acceptor

An alkali is a proton donor

An alkali is a proton solvent

An alkali is a proton sink

Question 21 of 21

Acids & Salts (Triple) quiz

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