Acids & Salts (Triple) quiz

1. Is magnesium oxide acidic or basic?

Depends on the conditions

Acidic

Neutral

Basic

Question 1 of 21

2. An alkali is called a proton _________

An alkali is a proton donor

An alkali is a proton solvent

An alkali is a proton sink

An alkali is a proton acceptor

Question 2 of 21

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

4-7

0-3

8-10

11-14

Question 3 of 21

4. If iron chloride has the formula FeCl₃, what is the formula of the iron ion?

Fe⁰

Fe²⁺

Fe³⁺

Fe⁺

Question 4 of 21

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

Na⁺

Li⁺

Ca²⁺

K⁺

Question 5 of 21

6. acid + alkali →

acid + alkali → salt + hydrogen + oxygen

acid + alkali → salt + water + carbon dioxide

acid + alkali → salt + water

acid + alkali → salt + hydrogen

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) 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 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.

Question 7 of 21

8. What is the test for copper (II) ions (Cu²⁺) and what is the result?

Flame test. Flame colour is red

Flame test. Flame colour is lilac

Add NaOH. A blue precipitate forms.

Add NaOH. A green precipitate forms.

Question 8 of 21

9. State the solubility rule for nitrate salts

all nitrates are insoluble

all nitrates are soluble

all nitrates are insoluble, except sodium nitrate, potassium nitrate and ammonium nitrate

all nitrates are soluble except silver nitrate and lead nitrate

Question 9 of 21

10. What is an acid?

An acid is a compound that reacts with metals

An acid is a green solution

An acid is a corrosive substance

An acid is a source of hydrogen ions, H⁺

Question 10 of 21

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

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.

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) 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 11 of 21

12. A pure, dry sample of a soluble salt can be prepared starting with an insoluble reactant. What is this method called?

Precipitation method

Excess solid method

Titration method

Combustion method

Question 12 of 21

13. Describe how you would test for sulfate ions (SO₄²⁻) and what is the result if they are present?

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

Add nitric acid and see if carbon dioxide bubbles form

Add dilute HCl, followed by silver nitrate (AgNO₃) and see if a white precipitate forms

Flame test. Flame colour is lilac

Question 13 of 21

14. What is the empirical formula of an alcohol with the analysis; 52.2% C, 13.0% H and 34.8% O?

C₂H₆O₂

C₂H₃O

C₂H₆O

CH₆O

Question 14 of 21

15. Can a base neutralise an acid?

Sometimes

No

Yes

Only if it is more reactive than hydrogen

Question 15 of 21

16. What is defined as a proton donor?

A base

An ore

An acid

An alkali

Question 16 of 21

17. What is the universal indicator colour of a pH 11-14 solution?

Green

Yellow

Purple

Red

Question 17 of 21

18. 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 18 of 21

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

Carbon dioxide

Hydrogen

Oxygen

Chlorine

Question 19 of 21

20. Describe how you would carry out a flame test

Put solid onto a wire. Put into a blue flame

Put solid onto a wire. Put into an orange 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

Question 20 of 21

21. When preparing hydrated copper(II) sulfate crystals starting from copper(II) oxide, why is an excess of copper (II) oxide added?

To ensure there is enough solid left for the impurities to be filtered out

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

To increase the rate of reaction

To prevent the acid from evaporating

Question 21 of 21

Acids & Salts (Triple) quiz

Related Posts:

Share This Story, Choose Your Platform!