Question 4 (a) The schematic diagram shows part of the Solvay process used for the manufacture...

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Question 4 (a) The schematic diagram shows part of the Solvay process used for the manufacture of Sodium carbonate. ee (iii) Ammonia Carbon dioxide Saturated sodium chloride I. II. UNITI Process I Ammonium chloride Sodium hydrogen carbonate. UNIT II Explain how the sodium chloride required Two main reactions take place in UNIT 1. of ammonium hydrogen carbonate. I., Write an equation for this reaction II. Write an equation for the second reaction State how the following are carried out: Name two industrial uses of sodium carbonate Process I for this process is obtained from sea water. The first one is the formation I. Process I Process II II. (iv) In an experiment to determine the percentage purity of the sample of sodium Carbonate produced in the Solvay process, 2.15 g of the sample reacted completely with 40.0 cm³ of 0.5 M sulphuric acid. calculate the number of moles of sodium, carbonate that reacted. Determine the percentage of sodium carbonate in the sample. (Na 23.0, C = 12.0, 0 = 16.0) Sodium carbonate (2 marks) (b) The question required the candidates to: • Explain how sodium chloride is extracted from sea water. Write equations for the reactions which produce ammonium hydrogen carbonate and sodium hydrogen carbonate in the Solvay process. Show how ammonium chloride is separated from sodium hydrogen carbonate. Determine the percentage of sodium carbonate in the sample obtained. State the uses of sodium carbonate. Question 4 (a) The schematic diagram shows part of the Solvay process used for the manufacture of Sodium carbonate. ee (iii) Ammonia Carbon dioxide Saturated sodium chloride I. II. UNITI Process I Ammonium chloride Sodium hydrogen carbonate. UNIT II Explain how the sodium chloride required Two main reactions take place in UNIT 1. of ammonium hydrogen carbonate. I., Write an equation for this reaction II. Write an equation for the second reaction State how the following are carried out: Name two industrial uses of sodium carbonate Process I for this process is obtained from sea water. The first one is the formation I. Process I Process II II. (iv) In an experiment to determine the percentage purity of the sample of sodium Carbonate produced in the Solvay process, 2.15 g of the sample reacted completely with 40.0 cm³ of 0.5 M sulphuric acid. calculate the number of moles of sodium, carbonate that reacted. Determine the percentage of sodium carbonate in the sample. (Na 23.0, C = 12.0, 0 = 16.0) Sodium carbonate (2 marks) (b) The question required the candidates to: • Explain how sodium chloride is extracted from sea water. Write equations for the reactions which produce ammonium hydrogen carbonate and sodium hydrogen carbonate in the Solvay process. Show how ammonium chloride is separated from sodium hydrogen carbonate. Determine the percentage of sodium carbonate in the sample obtained. State the uses of sodium carbonate.

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