Advertisement Remove all ads

Calculate the total hardness in ppm in given water sample.: 50ml of standard hard water , containing 1mg pure CaCO3 per ml consumed 20ml EDTA solution. - Applied Chemistry 1

Numerical

Calculate the total hardness in ppm in given water sample.
: 50ml of standard hard water , containing 1mg pure CaCO3 per ml consumed 20ml EDTA solution.
: 50ml of water sample consumed 30ml EDTA solution using EBT indicator.

Advertisement Remove all ads

Solution

                                    1 ml SHW       =     1 mg of CaC03 eq.

                                      ∴ 50ml SHW   =     50 mg of CaC03 eq .
                                     50 ml of SHW = 20 ml of EDTA solution.
                                     20 ml of EDTA =  50 mg of CaC03 eq. 
                                    ∴ 1 ml of EDTA =  `50/20 ` mg of CaC03 eq .
                                                             = 2.5 mg of CaC03 eq. 
                       50 ml of water sample  =  30 ml of EDTA solution.

                ∴ 1000 ml of water sample   = `(1000 xx 30 ) /50`
                                                             = 600 ml of EDTA solution
                        1 ml of EDTA                =    2.5 mg of CaC03 eq. 
                ∴ 600 ml of EDTA               =  2.5x 600
                                                            = 1500 mg of CaC03 eq. 
                     ∴   Total hardness of     = 1500 mg/L
                  water sample                    = 1500ppm.

Concept: Hardness of Water
  Is there an error in this question or solution?
Advertisement Remove all ads
Advertisement Remove all ads
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×