Residual hardness in ion exchange process is    0 points10-15 ppm30-60 ppm0-2 ppm15-30 ppm

An ion exchanger is used domestically as well as on an industrial scale to make hard water soft.a. Which type of hardness in water does the ion exchanger remove? (1 Mark)______________________________________________________________________________________________________________________________________________________________________b. Describe the process of removing hardness from water through ion resin. (1 Mark)______________________________________________________________________________________________________________________________________________________________________c. How can an ion exchange resin be renewed (reused)? (1 Mark)____________________________________________________________________________________________________________________________________________________________________

Calculate the total and permanent hardness in ppm in given water sample:1. 50 mL of standard hard water, containing 1 mg, pure CaCo3 per mL, consumed 20 mL EDTA solution.2. 50 mL of the water sample consumed 30 mL EDTA solution using EBT indiactor.3. 50 ml of the water sample after boiling and filtering consumed 10 mL of EDTA solution.

You are given a water hardness of 0.6 gpg. Convert it to ppm.

The transition metal having highest 3rd  ionisation enthalpy is :

Ionisation Enthalpy