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1 Chlorine and hydrogen are produced from the electrolysis of hydrochloric acid a) Explain what is meant by electrolysis. Answers: 2. The ions present in sodium chloride solution are sodium ions, Na+ chloride ions, Cl- hydrogen ions, H+ hydroxide ions, OH- A direct electric current is used to electrolyse sodium chloride solution. a) Which ions will be attracted to the cathode during the electrolysis of sodium Decomposition (splitting) of a compound using ........................................................................................................................... electricity ........................................................................................................................... b) Describe the test to show that chlorine gas is produced. Damp blue litmus paper bleaches (goes white) chloride solution? ............................................................................................................................................... b) One of the products of the electrolysis is chlorine. The half equation for the production of chlorine is 2Cl- Cl2 + 2e- Explain how the half equation shows that the chloride ions are oxidised. ............................................................................................................................................. ........................................................................................................................... .......................................................................................................................... H+ and Na+ ions Chlorine ions have lost electrons ............................................................................................................................................. c) Suggest why the solution remaining at the end of electrolysis is alkaline. ............................................................................................................................................... ...................I.t...f.o..r.m....s..s..o..d..i.u..m....h..y..d..r.o..x..i.d..e..,..w...h..i.c.h...i.s...a..l.k.a..l.i.n..e...........................................PDF Image | How to work with Electrolysis
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