Test Index

WAEC Chemistry 2019 Paper

© africaexams.com

Question : 22

Total: 50

consider the following reaction equation: 2Al(OH)

_3

_2

_4

_2

_3

_2

O. How many moles of tetraoxosulphate(vi)acid is needed to produce 0.5mol of aluminium tetraoxosulphate(vi)?

0.5
1.0
1.5
3.0

Solution:

Where 3mols of H2So4 = 1 mol of (Al2SO4)3

y mols of H2SO4 = 0.5 mol of (Al2SO4)3

Then cross multiply to have:

y =

\;\frac{3 \times 0.5}{1}

y = 1.5 moles

© africaexams.com

Go to Question:

Prev Question

Next Question