What is the % M/M concentration of 5.00 mL of methanol in 25 g solution of methanol in water? The density of methanol is 0.791 g/mL. The density of water is 1.000 g/mL. The density of the solution is 0.995 g/mL. Please show work, thank you!
5 mL methanol/25 g soln MeOH + H2O
What is the mass of the methanol?
mass = volume x density
mass = 5 mL x 0.791 g/mL = about 4 g (but you should do it more accurately).
(4/25)*100 = % m/m (weight/weight)