Stoichiometry Calculation
2020 Oct Nov Paper 12 Q5 A white powder is known to be a mixture of magnesium oxide and aluminium oxide. 100 cm3 of 2 mol dm-3 NaOH (aq) is just enough to dissolve the aluminium oxide in (x) grams of the mixture. The reaction is shown.[Al _{2} O _{3}+2 OH ^{-}+3 H _{2} O … Read more