1.

40% w/WCa(OH)_(2) solution has a molarity of 7.8M. Calculate the density of the solution.

Answer»

`1.03` g/cc
` 1.04`g/cc
`1.54`g/cc
` 1. 44 ` g/cc

SOLUTION :Let the density of solution be = xg/cc
Molarity = 7.8M
Molecular mass of `Ca(OH)_(2) = 40 + 34 = 74`
Mass of solute = 40 g
Molarity = `("mass of solute")/("molecular mass of solute") XX 1000/(100/x) 3`
`(.:'v = m/d)`
` 7.8 = 40/74 xx 1000/100xx x`


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