Some Basic Concepts of Chemistry - Result Question 80

####18. The number of moles of $KMnO _4$ that will be needed to react completely with one mole of ferrous oxalate in acidic medium is

(1997)

(a) $\frac{2}{5}$

(b) $\frac{3}{5}$

(c) $\frac{4}{5}$

(d) 1

Show Answer

Solution:

  1. From the formula, $M _f=\frac{M _1 V _1+M _2 V _2}{V _1+V _2}$

Given, $V _1=750 mL, M _1=0.5 M$

$$ \begin{aligned} V _2 & =250 mL, M _2=2 M \ & =\frac{750 \times 0.5+250 \times 2}{750+250}=\frac{875}{1000}=0.875 M \end{aligned} $$



NCERT Chapter Video Solution

Dual Pane