A white powder is used by doctors to support fractured bones. (a) Write the name and chemical formula of the powder. (b) How is this powder prepared? (c) When this white powder is mixed with water, a hard solid mass is obtained. Write a balanced chemical equation for the change.

(a) The chemical name and formula of the white coloured powder which is used by doctors for supporting fractured bones is:

Chemical name – Calcium sulphate hemihydrate and Formula – CaSO4.1/2H2O

(b) When this white powder is mixed with water a hard-solid mass is obtained. The balanced chemical equation for the change is

CaSO4.1/2H2O + 1 1/2H2O → CaSO4.2H2O

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