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

=20/0.793

=25.22 mL.

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