Sodium hydroxide and chlorine are used to make household bleach
Chlorine and sodium hydroxide are important raw materials they are involved in making about half the chemicals we use on a daily basis including solvents plastics soap medicines and food additives
Sodium chloride solution brine can be separated by electrolysis
Hydrogen is made at the negative cathode chlorine is made at the positive anode
Sodium hydroxide forms in a solution
Salt is mined in Cheshire in two ways
Mining it from the ground as rock salt
Solution mining by pumping in water and extracting saturated salt solution
Mining salt can lead to subsidence the ground above a mine can sink causing landslips and destroying homes
Salt at the surface particularly brine solution can escape and effect habitats
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