A Level Chemistry 9701/12/O/N/20 Q5

Question

A white powder is known to be a mixture of magnesium oxide and aluminium oxide.
100 cm3 of 2mol dm–3 NaOH(aq) is just enough to dissolve the aluminium oxide in x grams of the mixture.
The reaction is shown.

Al 2O3 + 2OH– + 3H2O → 2Al(OH)4–

800 cm3 of 2mol dm–3 HCl(aq) is just enough to dissolve all of the oxide in x grams of the mixture.
The reactions are shown.

Al 2O3 + 6H+ → 2Al3+ + 3H2O

MgO + 2H+ → Mg2+ + H2O
How many moles of each oxide are present in x grams of the mixture?

Cher Questions Solution Bank Rumusan Jawapan SPM & IGCSE Questions Answers Solution

New Comer 0

Answer ( 1 )

    0
    2021-07-06T17:59:35+08:00

Leave an answer