describe, explain, and write equations for, the reactions of the chlorides NaCl, MgCl₂, Al Cl₃, SiCl₄, PCl₆ with water including the likely pHs of the solutions obtained

explain, including by use of an equation, the use of chlorine in water purification to include the production of the active species HOCI and CIO\(^-\) which kill bacteria

describe and explain the shape of, and bond angles in, molecules containing sp, sp\(^2\) and sp\(^3\) hybridised atoms