To 980 ml of 40% sulfuric acid solution (density 1.3 g / ml) was added 120 ml of water. Find the mass fraction
| November 29, 2020 | education
To 980 ml of 40% sulfuric acid solution (density 1.3 g / ml) was added 120 ml of water. Find the mass fraction of acid in the resulting solution.
in order to find the acid fraction, we solve the equation
m1ω1 = m2ω2
m1 = V ∙ ρ = 980 ∙ 1.3 = 1274 g
m2 = 1274 + 120 = 1394 g
ω2 = m1ω1 / m2 = 1274 ∙ 40/1394 = 36.6%
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