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20 " mL of " x M HCl neutralises complet...

20 " mL of " x M HCl neutralises completely 10 " mL of " 0.1 M `NaHCO_3` solution and a further 5 " mL of " 0.2 M `Na_2CO_3` to methyl orange end point. What is the value of `x`?

A

0.167 M

B

0.133 M

C

0.150 M

D

0.200 M

Text Solution

Verified by Experts

The correct Answer is:
C
Meq HCl `= (1 xx x) xx 20 = 20x`
Meq `NaHCO_(3) + "Meq "Na_(2)CO_(3) = (0.1 xx 1) xx 10 + (0.2 xx 2) xx 5 = 3 rArr 20 x = 3 rArr x = 0.15 M`
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