Question

How does Magnesium Oxide give Magnesium Sulphate?

• A. $MgO$ $+$ $H_{2}S{O}_3$
• B. $MgO$ $+$ $H_{2}S{O}_4$
• C. $MgO$ $+$ $S{O}_2$
• D. $MgO$ $+$ $S{O}_3$

Answer 1

The correct option is B $MgO$ $+$ $H_{2}S{O}_4$

When magnesium oxide is dissolved in dilute sulphuric acid, it forms colorless aqueous solution of Magnesium Sulphate. The balanced equation can be written as-
$MgO$ $+$ $H_{2}S{O}_4$ $=$ $MgS{O}_4$ $+$ $H_{2}O$
This aqueous solution when evaporates and crystallizes, colorless crystals of Epsom salt are obtained.