if density of methanol is 0.793 kg/L , what is its volume needed for making 2.5L of its 0.25 M soln.?

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if density of methanol is 0.793 kg/L , what is its volume needed for making 2.5L of its 0.25 M soln.?

2007-04-26 21:54:05 · 2 answers · asked by mathiphy 2 in Science & Mathematics ➔ Chemistry

2 answers

Use this formula:
C1V1 (the original/ stock solution) = C2V2

Divide the given density by the MW to get the concentration then substitute to the formula.

(793g/L / MW) V1 = 0.25M * 2.5 L

Answer's been given by the other guy.

2007-04-27 03:29:57 · answer #1 · answered by zanekevin13 4 · 0⤊ 0⤋

Moles = 0.25*2.5 = .625

Mass = .625*32 = 20 g

Thus vol = 0.025 l

2007-04-27 05:04:27 · answer #2 · answered by ag_iitkgp 7 · 0⤊ 0⤋