Explain giving reasons :
(i) Tartaric acid is a component of baking powder used in making cakes.
(ii) Gypsum, `CaSO_(4).2H_(2)O` is used in the manufacture of cement.

Explanation

(i) Role of tartaric acid in baking posder (mixture of tartaric acid and sodium hydrogen carbonate) is to neturalise sodium carbonate formed upon heating sodium hydrogen carbonate.
`underset("carbonat")underset("Sod,hydrogen")(2NaHCO_(3))overset("heat")tounderset("Sod, carbonate")(Na_(2)CO_(3))+H_(2)O+CO_(2)`
In cast it is not done, cake will be bitter and sodium carbonate will also have injurious side effectss.
(ii) The role of gypsum `(CaSO_(4).2H_(2)O)` in the manufacture of cement is to slow down the process of setting of cement.