Answer to Question #5047 in Physical Chemistry for oshinni
A solution contains a solute with molar mass 94.5 g/mol. The solution is
1.77 m and also 1.70 M. Calculate the density of the solution.
c - molarity = 1.70 M b - molality = 1.77 m M - molar mass = 94.5 g/mol d - density - g/mL
c = n(solute) / V(solution) n(solute) = c*V(solution) m(solute) = n(solute)*M(solute) assume, that we have 1L of solution. Hence, n(solute) = 1.7 M * 1 L = 1.7 mol m(solute) = 1.7 mol * 94.5 g/mol = 160.65 g
b = n(solute) / m(solvent) m(solvent) = n(solute) / b m(solvent) = 1.7 mol / 1.77 = 960.45 g
m(solution) = m(solute) + m(solvent) = 160.65 g + 960.45 g = 1121.1 g d(solution) = m(solution) / V(solution) = 1121.1 g / 1 L = 1.12 kg/L = 1.12 g/mL