Mole ConceptHard
Question
The minimum mass of sulphuric acid needed for dissolving 3 g of magnesium carbonate is
Options
A.3.5 g
B.7.0 g
C.1.7 g
D.17.0 g
Solution
MgCO3 + H2SO4 → MgSO4 + CO2 + H2O
84 g 98 g
$\therefore 3.0g \frac{98}{84} \times 3 = 3.5g$
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