Question

A white coloured powder is used by doctors for supporting fractured bones. (a) Write chemical name and formula of the powder. (b) When this white powder is mixed with water a hard solid mass is obtained. Write balanced chemical equation for the change.

Answer 1

(a)caco4.1/2h2o

(b)yes when pop is mixed with water it forms a mixture which becomes hard after drying.

balanced equation-caco4.1/2h2o+1.1/2h2o

Answer 2

Answer:

a) Calcium sulphate hemihydrate  - CaSO4.1/2H2O

b) CaSO4.1/2H2O + 1/2H2O ⇒ CaSO4.2H2O (Gypsum)

hope this helps.