Question

50 ml of a water sample requires 12.7 of 0.02 M EDTA during titration. Calculate total hardness of the water

Answer 1

Given:

Volume of water sample used = 50 ml

Volume of 0.02M EDTA solution consumed = 12.7 ml

To Find:

Total hardness of water = ?

Solution:

Let, Volume of water sample used = x

Volume of 0.02M EDTA solution consumed = y

Total Hardness =  $\dfrac{x}{y}$ × 1000

=$\dfrac{12.7}{50}$×1000

=254 ppm