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    				| 1. | e colour of aqueous solutions of BaCl2 and NaSO AnaqueoussolutionofbariumState thchloride is added to an aqueous solution of sodium sulphate. What change is observed whenthe two are mixed?In which category would you place this reaction and why? | 
| Answer» If you add aqueous barium chloride BaCl2 solution and aqueous sodium sulphate Na2SO4 solution, a precipitate of barium sulphate is formed. BaCl2(aq) + Na2SO4(aq) → BaSO4(s) + 2NaCl(aq) The colour of barium sulphate, like all Group 1 and Group 2 metal salts, is white as a solid or precipitate, and colourless when dissolved in water. In general only transition metal salts have colour. For example copper (II) sulphate is blue and iron (III) hydroxide is reddish brown. TLDR: white precipitate! | |