Question

Date: 1 27 The hardness of 20000l of coader was completely removed by passing it through a zeolite softener. The zeolite softener required 320L of 1.5% brine solution for gegeneration. Calculade hardness of given water?. ​

Answer 1

Answer:

400 litres solution cxontains −>400×105mg of NaCl

Now,

CaCO3 equivalent =400×105×100/(2×58.5)=341.88×105mg of CaCO3 equivalent

1 litre =341.88×105ppm104 litre =xX=341.88×105×104

Hardness of water sample =341.88×109ppm