Write the balanced equations for the reaction of the following compounds with water :
(a) `Al_(4)C_(3)`
(b) `BF_(3)`
( c) `CaNCN`.

Explanation

(a) With aluminium carbide, methane is formed.
`Al_(4)C_(3) + 12H_(2)O to 4Al(OH)_(3)+3CH_(4) uarr`.
(b) With boron trifluoride, boric acid is formed.
`4BF_(3) + 3H_(2)O to H_(3)BO_(3) + 3HBF_(4)`
( c) With calcium cynamide, `CaCO_(3)` is precipitated.
`C_(9)NCN + 5H_(2)O to CaCO_(3) darr + 2NH_(4)OH`.