Uses of chlorine and chlorate(I) (3.2.3.2) | AQA A-level Chemistry - (7405)

3.2.3.2 Uses of chlorine and chlorate(I)

Content	Opportunities for skills development
$The reaction of chlorine with water to form chloride ions and chlorate(I) ions. The reaction of chlorine with water to form chloride ions and oxygen. Appreciate that society assesses the advantages and disadvantages when deciding if chemicals should be added to water supplies. The use of chlorine in water treatment. Appreciate that the benefits to health of water treatment by chlorine outweigh its toxic effects. The reaction of chlorine with cold, dilute, aqueous NaOH and uses of the solution formed.$	$Research opportunity Students could investigate the treatment of drinking water with chlorine. Students could investigate the addition of sodium fluoride to water supplies.$
$Required practical 4 Carry out simple test-tube reactions to identify: cations - Group 2, NH₄⁺ anions - Group 7 (halide ions), OH⁻, CO₃²⁻, SO₄²⁻$

Content

Opportunities for skills development

The reaction of chlorine with water to form chloride ions and chlorate(I) ions. The reaction of chlorine with water to form chloride ions and oxygen. Appreciate that society assesses the advantages and disadvantages when deciding if chemicals should be added to water supplies. The use of chlorine in water treatment. Appreciate that the benefits to health of water treatment by chlorine outweigh its toxic effects. The reaction of chlorine with cold, dilute, aqueous NaOH and uses of the solution formed.

Research opportunity Students could investigate the treatment of drinking water with chlorine. Students could investigate the addition of sodium fluoride to water supplies.

Required practical 4 Carry out simple test-tube reactions to identify: cations - Group 2, NH₄⁺ anions - Group 7 (halide ions), OH⁻, CO₃²⁻, SO₄²⁻

Uses of chlorine and chlorate(I)