1.

A small amount of CaCO_(3) completely neutralises 525 ml of (N)/(10) HCl and no acid is left at the end after converting all calcium chloride to CaSO_(4). How much plaster paris (CaSO_(4)(1)/(2)H_(2)O) can be obtained

Answer»

`1.916g`
`5.827g`
`7.53g`
`3.81g`

Solution :No. of Meq of HCl = `525xx(1)/(10)=52.5`
No. of Meq of HCl = No. of mecq of `CaCl_(2)` =
No. of Meq of PLASTER of PARIS
So No. of Meq of plaster of paris = 52.5
`52.5=("wt of plaster of paris")/("GEW of plaste of paris")xx1000`
`52.5=(X)/(72.5)xx1000impliesx=3.81g`


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