TS EAMCET 19-July-2022 Shift 2 Solved Paper

Moles of HCl added to coagulate 200‌mL of
‌ colloid ‌=‌

‌ mass of ‌HCl‌ taken ‌

‌ molecular mass of ‌HCl

‌=‌

0.73

(1+35.5)

=0.02‌mol
‌=20m‌mol
Now, we know
Flocculation value is the minimum number of moles of electrolyte per litre required to coagulate a colloid.
200‌mL of sol required 20‌mmol of HCl
So, 1000‌mL of sol required =‌

20

200

×1000
=100m‌mol
Thus, the flocculation value of HCl for the colloid is 100 .