Question

. 20ml of a solution is 0.1 (M) each of NaOH and
Na2Co3. It is titrated with 0.1(M) HCl using
phenolphthalein as indicator. The volume of HCI
used at the end point will be
(A) 20 ml
(B) 40 ml
(C) 60ml
(D) 30 ml
​

Answer 1

Answer:

10

Explanation:

m1v1=m2v2

20*0.1=0.2*v2

10ml