Question

Hardness in water sampleis 300ppm. Caco3 then what is its molarity

Answer 1

Answer:

Hardness is most commonly expressed as milligrams of calcium carbonate equivalent per litre. Water containing calcium carbonate at concentrations below 60 mg/l is generally considered as soft; 60–120 mg/l, moderately hard; 120–180 mg/l, hard; and more than 180 mg/l, very hard (McGowan, 2000)

Answer 2

Answer:

Explanation:

400 ppm mean 400gm in 10^6 ml solution

and molarity = (wt/Mw) x (1000 / V in ml)

so  

molarity = (400/100) x (1000 /10^6)

molarity = 4 x 10^-3 M

i hope it will help you

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