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A 10 mg effervescent tablet containing s...

A 10 mg effervescent tablet containing sodium bicarbonate and oxalic acid release 0.25 m l 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

33.6

B

8.4

C

0.84

D

16.8

Text Solution

Verified by Experts

The correct Answer is:
B
`HCO_(3)^(-) + H^(-) rarr H_(2)O + CO_(2) , n_(O_(2)) = (0.25)/(25 xx 10^(3)) = 10^(-5) mol = n_(NaHCO_(3))`
% of `NaHCO_(3)` in each tablet `= (84 xx 10^(-5) xx 10^(3))/(10) xx 100 = 8.4`
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