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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

0.15 M

D

0.2 M

Text Solution

Verified by Experts

The correct Answer is:
C
20 " mL of " x M HCl`-=10" mL of " 0.1 M `NaHCO_(3)+5" mL of " 0.2 M Na_(2)CO_(3)`
(methyl orage indicated `100%` reaction of `NaHCO_(4) and Na_(2)CO_(3)`)
0.2 M `Na_(2)CO_(3)=0.4Na_(2)CO_(3)`
`20x=1+2impliesx=0.15`
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