Question

In a chemical reaction, 150 g baking soda mixture containing sodium bicarbonate and vinegar on heating gives 87 g carbon dioxide gas. How much solid residue would be left over?

• A. 52 g
• B. 59 g
• C. 63 g
• D. 64 g

Answer 1

The correct option is C 63 g

We know,
According to law of conservation of mass,
$\text{Total mass of reactants = total mass of products}$
Here,
Mass on the reactant side = 150 g
Given,
Mass of $C{O}_2$ liberated = 87 g
So, from the law of conservation of mass,
150 g = mass of residue + mass of $C{O}_2$
$\Rightarrow \text{mass of residue}=(150-87)g=63g$