Question

State the law of conservation of mass . What is the colour of percipitate formed when barium chloride is mixed with sodium chloride sulphate ?

Answer 1

law of conservation of mass states that mass is neither created nor destroyed during a chemical reaction .

the color of precipitate formed is white

Answer 2

When barium chloride combines with sodium sulphate in the form of their aqueous solutions, a white precipitate of barium sulphate is formed which is insoluble in water. The reaction also creates sodium chloride, which remains dissolved in water and so cannot be seen. ... So this reaction is a chemical change.