If the density of methanol is $0.793 kg / L$ , what is its volume needed for making $2.5 L$ of its $0.25 M$ solution?

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Solution

Mass of methanol required is
M=Volume of solution×Molariy of solution×Molar mass of methanol
=2.5×0.25×32=20 g.

Volume of methanol needed =mass/density=0.02/0.79320 = 25.22 mL.

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