Question

04.0.30 gm of Cacoa was dissolved in HCl and the
solution made up to 1000 ml with distilled water.
100 ml of the solution required 30 ml of EDTA
solution for titration. 100 ml of hard water sample
required 35 ml of EDTA and after boiling and
filtering required 12 ml of EDTA solution Calculate each​

Answer 1

Answer:

Remember: initial concentration x initial volume = final concentration x final volume

(0.5 M) (X ml) = (0.1 M) (100 ml)

(X ml) = (0.1 M) (100 ml) / (0.5 ml)

X ml = 20 ml of 0.5 M EDTA