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Describe the reactions which take place at the electrodes in the membrane cell and explain why they are redox reactions.
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Skills for Chemistry: Open-book Paper 2002 Describe the reactions which take place at the electrodes in the membrane cell and explain why they are redox reactions. A membrane cell uses electricity and various reactants to produce chlorine gas, hydrogen gas and hydroxide ions. A membrane is a tissue which connects biological cells to their organs and other structures. They are permeable to water but impermeable to polar substances. Movement of ions across a membrane occurs by carrier-meditated processesi. In the membrane cell, redox reactions occur at the anode and cathode. At the anode, the following reaction occurs. 2Na+(aq) + 2Cl-(aq) 2Na+(aq) + Cl2(g) + 2e- ii the ionic equation is 2Cl-(aq) Cl2(g) + 2e- Membranes are synthetic polymers and have the ability to transport cations rather than anions. So this allows the Na+ ions to move across it and prevents the Cl- ions from passing through. At the titanium anode, the sodium hydroxide provides the...
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