`20` ml of a solution containing `Na_2CO_3` and `NaHCO_3` requires `10` ml of `0.1` M `H_2SO_4` for neutralization using

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Q 1109256118.     `20` ml of a solution containing `Na_2CO_3` and `NaHCO_3` requires `10` ml of `0.1` M `H_2SO_4` for neutralization using phenolphthalein as an indicator. Methyl orange is then added when a further `10` ml of `0.2` N `H_2SO4` is required. Molar concentrations of `Na_2CO_3` and `NaHCO_3` in the solution respectively are


A

`0.1M` and `0.1 M`

B

`0.1 M` and `0.05 M`

C

`0.05 M` and `0.05 M`

D

`0.05 M` and `0.10 M`

HINT


Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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