Exam

NEET

Year

2018

Subject

Chemistry

Chapter

Some Basic Concepts of Chemistry

NEET 2018 · Chemistry · Some Basic Concepts of Chemistry

A mixture of 2 . 3g formic acid and 4 . 5g oxalic acid is treated...

A mixture of $2 . 3g$ formic acid and $4 . 5g$ oxalic acid is treated with concentrate ${H}_{2}{SO}_{4}$. The evolved gaseous mixture is passed through $KOH$ pellets. What will be the weight in grams of the remaining product at $STP$?

Step-by-step solution

For gases $n ∝ V$:





${CO}_{2}$ is absorbed by $KOH$. So the remaning product is only $CO$. moles of $CO$ formed from both reactions $= \dfrac{1}{20} + \dfrac{1}{20} = \dfrac{1}{10}$

Left mass of $CO$ = moles$\times$molar mass

$= \dfrac{1}{10} \times 28$

$= 2 .8 g$