7. Fig. 7.1 shows a simplified diagram of the electrolysis of sodium chloride solution, used to produce chlorine in industry. concentrated sodium chloride solution anode chlorine gas H permeable membrane cathode Fig. 7.1 hydrogen gas The balanced equation for the overall chemical change that occurs in the process shown in Fig. 7.1 is 2NaCl + 2H₂O → 2NaOH + Cl₂ + H₂ a. Show that the relative formula mass of sodium chloride is 58.5 sodium hydroxide solution b. Calculate the number of moles in 234g of sodium chloride. Show your working. Number of moles= Volume= c. Calculate the volume of chlorine molecules produced at room temperature and pressure, when 234g of sodium chloride are electrolysed. (1 mole of chlorine molecules has a volume of 24 dm³ at room temperature and pressure). Show your working

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Batteries

A battery is simply an electrochemical cell or group of cells that generate electric current. Batteries are the devices that generate current using redox reactions. These reactions proceed by the transfer of electrons. An ideal battery or cell should produce a constant voltage. A battery should actually be light in weight.