(main)[1]
A student needs to prepare $250\,\text{cm}^3$ of $0.20\,\text{mol dm}^{-3}$ sodium hydroxide. [$A_r$: Na, $23$; O, $16$; H, $1$] State the mass of sodium hydroxide needed.
Chemistry 5070 · O Level · The mole and the Avogadro constant
Chemistry 5070 · O Level · The mole and the Avogadro constant
A student needs to prepare $250\,\text{cm}^3$ of $0.20\,\text{mol dm}^{-3}$ sodium hydroxide. [$A_r$: Na, $23$; O, $16$; H, $1$] State the mass of sodium hydroxide needed.