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Q.

The mineral trona has the formula Na2CO3.NaHCO32H2O and a formula mass of 226gmol1. How many mL of 0.125 M HCl are needed to convert all the carbonate and bicarbonate in a 0.407 g sample of trona into carbon dioxide and water?

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a

43.2 mL

b

21.6 mL

c

28.8 mL

d

14.4 mL

answer is A.

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Detailed Solution

It is known that,

N1Vr=N2V2

0.407226×3=v×0.1251000V=43.2ml

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