A solution of a substance ‘X ‘ is used for white washing.
i. Name the substance ‘X’ and write its formula.
ii. Write the reaction of the substance ‘X’ named in (i) above with water.
Answers (1)
i. Substance ‘X’ is calcium oxide also known as quicklime that is used in white washing. Its chemical formula is CaO.
ii. Calcium oxide reacts with water in a combination reaction to from calcium hydroxide also called slaked lime, the reaction is: \[CaO_{(s)}+H_2O_{(l)} \rightarrow Ca(OH)_{2(aq)}\]