Zero Marks 0 If none of the option is se

Question

Zero Marks 0 If none of the option is selected.
Negative Marks : -1 If wrong option is selected.
A sample of water has a hardness expressed as 200 ppm of Ca2+. This sample is passed through an ion exchange column and the Ca2+ is replaced by Ht. What is the pOH of the water after it
has been so treated ? [Atomic mass of Ca = 40]
=

Kunduz · Accepted Answer

Thie
meano
of
is
Cart
200 ppm
The concentration
Ans
that
Cart is
20
of
present in 106 ml of water
2oog
This
corres ponds
to
Ca2+
= 5
moles of coat
yo
This
also
corres ponds to
5X2 moles of
Htions.
106
me
has 10 moles of stions
will have
-6x 103 moles
lo x lot
3
(1o²me) il
of
water of
lo-2
moles of at
So
PH
-
A
- log [at]
-log {10-2
hence
the
pou would
be
14-2= 12 Ans.

Zero Marks 0 If none of the option is selected. Negative Marks : -1 If wrong option is selected. A sample of water has a hardnes