\(x\mathrm{mg}\) of \(\mathrm{Mg}(\mathrm{OH}{)}_{2}\) (molar mass = 58) is required to be dissolved in 1.0 L of water t…

\(x\mathrm{mg}\) of \(\mathrm{Mg}(\mathrm{OH}{)}_{2}\) (molar mass = 58) is required to be dissolved in 1.0 L of water to produce a pH of 10.0 at 298 K . The value of x is ______ mg. (Nearest integer)
(Given : \(\mathrm{Mg}(\mathrm{OH}{)}_{2}\) is assumed to dissociate completely in \({\mathrm{H}}_{2}\mathrm{O}\) )