TS EAMCET · Chemistry · Some Basic Concepts of Chemistry
\(28 \mathrm{~g} \mathrm{KOH}\) is required to completely neutralise \(\mathrm{CO}_2\) produced on heating \(60 \mathrm{~g}\) of impure \(\mathrm{CaCO}_3\). The percentage purity of \(\mathrm{CaCO}_3\) is approximately (molar masses of \(\mathrm{KOH}\) and \(\mathrm{CaCO}_3\) are 56 and \(100 \mathrm{~g} \mathrm{~mol}^{-1}\), respectively)
- A 41.6
- B 40
- C 20.8
- D 83.3
Answer & Solution
Correct Answer
(A) 41.6
Step-by-step Solution
Detailed explanation
The given relation \(\mathrm{CaCO}_3 \xrightarrow[\Delta]{\stackrel{2 \mathrm{KOH}}{\Delta}} \mathrm{CO}_2\) means, 2 moles of \(\mathrm{KOH}\) will neutralise 1 mole of \(\mathrm{CO}_2\). Given, (i) \(\mathrm{KOH}\) (used) \(=28 \mathrm{~g}\) (ii) Molar mass of…
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