1. States of matter

1.1 Solids, liquids and gases

1.2 Diffusion

2. Atoms, elements and compounds

2.1 Elements, compounds and mixtures

2.2 Atomic structure and the Periodic Table

2.3 Isotopes

2.4 Ions and ionic bonds

2.5 Simple molecules and covalent bonds

2.6 Giant covalent structures

2.7 Metallic bonding

3. Stoichiometry

3.1 Formulae

3.2 Relative masses of atoms and molecules

3.3 The mole and the Avogadro constant

4. Electrochemistry

4.1 Electrolysis

4.2 Hydrogen–oxygen fuel cells

5. Chemical energetics

5.1 Exothermic and endothermic reactions

6. Chemical reactions

6.1 Physical and chemical changes

6.2 Rate of reaction

6.3 Reversible reactions and equilibrium

6.4 Redox

7. Acids, bases and salts

7.1 The characteristic properties of acids and bases

7.2 Oxides

7.3 Preparation of salts

8. The Periodic Table

8.1 Arrangement of elements

8.2 Group I properties

8.3 Group VII properties

8.4 Transition elements

8.5 Noble gases

9. Metals

9.1 Properties of metals

9.2 Uses of metals

9.3 Alloys and their properties

9.4 Reactivity series

9.5 Corrosion of metals

9.6 Extraction of metals

10. Chemistry of the environment

10.1 Water

10.2 Fertilisers

10.3 Air quality and climate

11. Organic chemistry

11.1 Formulae, functional groups and terminology

11.2 Naming organic compounds

11.3 Fuels

11.4 Alkanes

11.5 Alkenes

11.6 Alcohols

11.7 Carboxylic acids

11.8 Polymers

12. Experimental techniques and chemical analysis

12.1 Experimental design

12.2 Acid–base titrations

12.3 Chromatography

12.4 Separation and purification

12.5 Identification of ions and gases

IGCSE Chemistry 10.1 Water Question Bank

[Maximum number: 1]

This question is about the first 30 elements in the Periodic Table.
Name the element which:

(a)

has an anhydrous chloride which turns pink when water is added

[ 1 ]

[Maximum number: 1]

A list of substances is shown.
> barium nitrate carbon monoxide hydrated cobalt(II) chloride copper(II) oxide anhydrous copper(II) sulfate ethane potassium iodide propene sodium bromide sulfur dioxide zinc oxide

Answer the following questions using only the substances from the list. Each substance may be used once, more than once or not at all.

Give the name of the substance that:

(a)

is used to test for the presence of water.

[ 1 ]

[Maximum number: 1]

A list of substances is shown.

Answer the questions using the substances in the list.
Each substance may be used once, more than once or not at all.
State which substance is:

(a)

an element which has a sulfate that is used to test for water

[ 1 ]

[Maximum number: 1]

The symbols of the elements of Period 3 of the Periodic Table are shown.

Answer the following questions about these elements.
Each symbol may be used once, more than once or not at all.
Write the symbol of the element which:

(a)

is used in water treatment [1]

[ 1 ]

[Maximum number: 1]

The names of nine substances are shown.
> aluminium oxide ammonia carbon monoxide anhydrous cobalt(II) chloride hydrated copper(II) sulfate iron(III) oxide nitrogen dioxide silver steel

Answer the following questions using these substances. Each substance may be used once, more than once or not at all.

Name the substance that is:

(a)

used to test for the presence of water. ..... [1]

[ 1 ]

[Maximum number: 1]

The following are the symbols and formulae of some elements and compounds.

Answer the following questions using only the elements or compounds in the list. Each element or compound may be used once, more than once or not at all.

State which element or compound is used:

(a)

to kill bacteria in drinking water [1]

[ 1 ]

[Maximum number: 1]

Which test is used to show that a sample of water is pure?

Evaporate the water to see if any solids remain.

Heat the water to check its boiling point.

Test with anhydrous cobalt(II) chloride.

Use universal indicator paper to check its pH .

[Maximum number: 4]

Period 3 contains the elements sodium to argon. This question asks about the chemistry of each of the Period 3 elements or their compounds.

(a)

Chlorine and compounds of chlorine are important in water treatment and in laboratory testing for water.

[ 4 ]

(i)

Chlorine is added to water to make the water safe to drink.

Explain why adding chlorine makes water safe to drink.

[ 1 ]

(ii)

A compound of chlorine is used in the laboratory to test for the presence of water.

Name the compound of chlorine used in this test and describe the colour change seen in a positive result of this test.
name of compound
colour change from to

[ 3 ]

(a)

The symbols of the elements in Period 3 of the Periodic Table are shown.

Use the symbols of the elements in Period 3 to answer the questions that follow. Each symbol may be used once, more than once, or not at all.

Give the symbol of the element that:

[ 1 ]

(i)

is used to kill microbes in water treatment [1]

[ 1 ]

[Maximum number: 2]

Cobalt and copper are transition elements.

(a)

Both copper and cobalt can form coloured compounds. Some of these compounds contain water of crystallisation.

[ 2 ]

(i)

State the colour change seen when a few drops of water are added to anhydrous copper(II) sulfate.
from to

[ 2 ]

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