1.

A 6.90 M solution of KOH in water contains 30% by mass of KOH. Calculate the density of the KOH solution.

Answer»

Solution :Molarity and density are RELATED as under :
Molarity =(% by mass x d x 10 )/(Molar mass)
`6.90= (30 XX d xx 10)/(56) `
` d = (6.90 xx 56)/(30 xx 10) = 1.288 g CM^(-3)`


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