[AMEDIO]

A mixture of CO and CO₂ when treated with I₂O₅ , gives I₂ vapour according to following eqn. :
5CO + I₂O₅ - > 5CO₂ + I₂
I₂ vapour was separated nd treated with HClO₄ and resultant HIO₄ reqd. 0.001 moles of glycerol ( CH₂OHCHOHCH₂OH ) for complete oxidn.
After treatment with I₂O₅ and removal of I₂ , the mixture was treated with excess of 0.1 N NaOH soln. Finally this soln. reqd. 20 ml of 1N HCl to reach the end pt. using phenolphthalein as indicator followed by using methyl orange as indicator after 1st end pt. and 10 ml of further HCl was consumed . Calculate the volume of NaOH used and % mole of CO₂ in original mixture.

[AMEDIO]

well i have written these equations:
5CO + I₂)₅ - > 5 CO + I₂

I₂ + 2 HClO₄ - > 2 HIO₄ + Cl₂

2HIO₄ + CH₂OHCHOHCH₂OH ->  2HCHO + HCOOH

now number of moles of HIO₄ required = 2 * 0.001 = 0.002

and number of moles of CO present initially = 0.005

but now i am stuck
what will be the number of moles of CO₂ ??

because if i know that , i will be able to get the number of moles of Na₂CO₃ as well ( which is going to be same as CO₂)

[rabolisk]

2HIO4 + CH2OHCHOHCH2OH ->  2HCHO + HCOOH

Are you sure about this?

[AMEDIO]

yup
its malaparade oxidation i reckon!!