KCET 2014 Chemistry Solved Paper

For the completely neutralization reaction,
Let the mass of CaO in mixture is x g and that of BaO is 10 – xg
Now,The sum of the gram equivalents of CaO and BaO
=‌

100×2.5

1000

=0.2
⇒‌

x

28

+‌

10−x

76.5

=0.25
⇒

76.5x+280−28x

28×76.5

=0.25
⇒48.5x=(0.25×25×76.5)−280
⇒x=

255.5

48.5

=5.26
Percentage of CaO in mixture is =

5.26

10

×100=52.6%