Maharashtra BoardEnglish MediumSTD 11 ScienceChemistryIntroduction to Analytical Chemistry4 Marks
Question
How much $CaO$ will be produced by decomposition of $5 g \ CaCO_3?$
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Answer
Given: Mass of $\mathrm{CaCO}_3$ consumed in reaction $=5 \mathrm{~g}$
To find: Mass of $\mathrm{CaO}$ produced
Calculation: Calcium carbonate decomposes according to the balanced equation,
So, $100 \mathrm{~g}$ of $\mathrm{CaCO}_3$ produce $56 \mathrm{~g}$ of $\mathrm{CaO}$.
$\therefore 5 \mathrm{~g}$ of $\mathrm{CaCO}_3$ will produce $=\frac{56 \not g}{100 \not g} \times 5 \mathrm{~g}=\mathbf{2 . 8} \mathrm{g}$ of $\mathbf{C a O}$
Ans: Mass of $\mathrm{CaO}$ produced $=2.8 \mathrm{~g}$
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