JEE Mains · Chemistry · STD 11 - 1. Some basic concept of chemistry
A \(10\,g\) effervescent tablet containing sodium bicarbonate and oxalic acid releases \(0.25\,ml\) of \(CO_2\) at \(T = 298.15\,K\) and \(p = 1\,bar\). If molar volume of \(CO_2\) is \(25.0\,L\) under such condition, what is the percentage of sodium bicarbonate in each tablet? [Molar mass of \(NaHCO_3 = 84\,g\,mol^{-1}\) ]
- A \(0.84\)
- B \(33.6\)
- C \(16.8\)
- D \(8.4\)
Answer & Solution
Correct Answer
(A) \(0.84\)
Step-by-step Solution
Detailed explanation
Let \(NaHCO_3 = x\,gm\) Then, \(H_2C_2O_4 = (10-x)\,gm\) \(\therefore \,{n_{NaHC{O_3}}} = \frac{x}{{84}}\) \(2NaHC{O_3} \to N{a_2}C{O_3} + {H_2}O + C{O_2}\) \(\therefore {n_{C{O_2}}} = \frac{x}{{168}}\) Total…
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