Gcse Chemistry

Front 1

Give five properties of ionic compounds.

Back 1

- Ionic bonding is between metals and non-metals
- Solids (at rtp)
- Soluble in water
- Exhibit strong electrostatic forces between ions
- In molten state, ions are mobile

Front 2

Define valency

Back 2

Number of electrons given, taken or shared

Front 3

What is the test for a carbonate, and what is a positive result?

Back 3

- Test for carbonate: Add acid
- Result if positive: Effervescence, carbon dioxide produced.

Front 4

What is the test for chloride (in solution), and what is a positive result?

Back 4

- Test: Acidify with dilute nitric acid, then add aqueous silver nitrate.
- Positive Result: White precipitate.

Front 5

What is the test for iodide (in solution), and what is a positive result?

Back 5

- Test: Acidify with dilute nitric acid, then add lead (II) nitrate.
- Positive Result: Yellow precipitate.

Front 6

Describe the effect of sodium hydroxide and aqueous ammonia on aqueous zinc

Back 6

For Both: White precipitate, soluble in excess, giving a colourless solution.

Front 7

Describe the effect of sodium hydroxide and ammonia on aqueous iron (III).

Back 7

For Both: Aqueous sodium hydroxide and ammonia both react with the iron (III) cation to produce a red-brown precipitate insoluble in excess.

Front 8

Describe the effect of aqueous sodium hydroxide and aqueous ammonia on aqueous iron (II).

Back 8

- Effect of Sodium Hydroxide: Green precipitate, insoluble in excess.
- Effect of aqueous ammonia: Green precipitate, insoluble in excess.

Front 9

Describe the effect of aqueous sodium hydroxide and aqueous ammonia on aqueous copper.

Back 9

- Effect of Sodium Hydroxide: Light blue precipitate, insoluble in excess.
- Effect of aqueous ammonia:Light blue precipitate, soluble in excess giving a dark blue solution.

Front 10

Describe the effect of aqueous sodium hydroxide and aqueous ammonia on (aqueous) calcium.

Back 10

- Effect of aqueous sodium hydroxide: White precipitate, insoluble in excess.
- Effect of aqueous ammonia: No precipitate.

Front 11

Describe the effect of aqueous sodium hydroxide and aqueous ammonia on aqueous ammonium.

Back 11

- Effect of aqueous sodium hydroxide: Ammonia produced on warming.
- Effect on aqueous ammonia: none

Front 12

Describe the effects of aqueous sodium hydroxide and aqueous ammonia on aqueous aluminium.

Back 12

- Aqueous sodium hydroxide: White precipitate, soluble in excess, giving it a colourless solution.
- Aqueous Ammonia: White precipitate, insoluble in excess.

Front 13

What is the test for sulphate in solution? And what is a positive result?

Back 13

- Test: Acidify with dilute nitric acid then add aqueous barium nitrate.
- Positive Result: White precipitate.

Front 14

What is the test for nitrate? And what is a positive result?

Back 14

- Test for nitrate: Add aqueous sodium hydroxide then aluminium foil; warm carefully
- Positive Result: Ammonia produced.

Front 15

What is the test for sulphur dioxide gas, and what is a positive result?

Back 15

Turns aqueous potassium dichromate (V) from orange to green.

Front 16

What is the test for chlorine gas, and what is a positive result?

Back 16

Bleaches damp litmus paper.

Front 17

What is the test for ammonia, and what is a positive result?

Back 17

Turns damp RED litmus paper BLUE.

Front 18

What is the test for carbon dioxide, and what is a positive result?

Back 18

Turns limewater milky.

Front 19

What is the test for hydrogen? And what is a positive result?

Back 19

- Test: Introduce a lighted splint.
- Positive Result: Produces a "pop" sound.

Front 20

What is the test for oxygen? And what is a positive result?

Back 20

- Test for oxygen: Introduce a glowing splint.
- Positive Result: Relights glowing splint.