excess concentrated ammonia solution. 4 Required practical 4 3.2.3.2 Uses of chlorine and chlorate(I) Research opportunity: 12.3 Required Carry out simple tests to work safely in a laboratory Students could practical The reaction of chlorine with water to identify cations group use laboratory apparatus for a variety investigate the activity 4: – form chloride ions and chlorate(I) ions. 2 M2+; ammonium of experimental techniques, including treatment of drinking Carry out NH4+ and anions group7 qualitative tests for ions water with chlorine. simple The reaction of chlorine with water to (17), X- halide ions; draw conclusions from observations Students could tube form chloride ions and oxygen. hydroxide OH-; made investigate the reactions to Appreciate that society assesses the carbonate CO3 2-; addition of sodium identify: advantages and disadvantages when sulfate SO4 2-. fluoride to water cations • – deciding if chemicals should be added to supplies. Group 2, NH4 + water supplies. anions • – The use of chlorine in water treatment. 7 (halide ions), Appreciate the benefits to health of water OH– , CO3 treatment by chlorine outweigh its toxic 2–, SO4 2– effects. 5 Chlorine and water 12.4 The reaction of chlorine with cold, dilute, supplies describe how chlorine reacts with water to form chloride and chlorate aqueous NaOH and uses of the solution ions and chloride ions and oxygen gas formed. Introduce the term Use ideas about oxidation and disproportionation and reduction to explain how chlorine it to the reaction reacts with water between chlorine and explain the benefits and water. Use data to disadvantages of adding chlorine to explore the use of water supplies chlorine in water supplies 6 Chlorine in bleach 12.4 describe the chemical reaction Use a demonstration to between chlorine and cold dilute show the bleaching sodium hydroxide solution action of sodium carry out an experiment and process chlorate (I) food dyes. the results to estimate the Use a class practice to concentration of sodium chlorate(I) in investigate the different commercial bleaches
excess concentrated ammonia solution. 4 Required practical 4 Carry out simple tests to identify cations – group 2 M2+; ammonium NH4+ and anions group7 (17), X- halide ions; hydroxide OH-; carbonate CO3 2-; sulfate SO4 2-. work safely in a laboratory use laboratory apparatus for a variety of experimental techniques, including qualitative tests for ions draw conclusions from observations made 3.2.3.2 Uses of chlorine and chlorate(I) 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 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. 12.3 Required practical activity 4: Carry out simple reactions to identify: • cations – Group 2, NH4 + • anions – 7 (halide ions), OH– , CO3 2–, SO4 2– 5 Chlorine and water supplies Introduce the term disproportionation and it to the reaction between chlorine and water. Use data to explore the use of chlorine in water supplies describe how chlorine reacts with water to form chloride and chlorate ions and chloride ions and oxygen gas Use ideas about oxidation and reduction to explain how chlorine reacts with water explain the benefits and disadvantages of adding chlorine to water supplies 12.4 6 Chlorine in bleach Use a demonstration to show the bleaching action of sodium chlorate (I) food dyes. Use a class practice to investigate the describe the chemical reaction between chlorine and cold dilute sodium hydroxide solution carry out an experiment and process the results to estimate the concentration of sodium chlorate(I) in different commercial bleaches 12.4 tube
Chemistry%20SoW%20Year%201.docx