Mixed 120 g of 40% and 280 g of 10% nitric acid solution. Determine the mass fraction of nitric acid in the resulting solution.
October 9, 2021
m1 (solution) = 120g
w% (solution) = 40%
m2 (solution) = 280g
w% (salt) = 10%
m1 (to-you) = 120 * 40/100 = 48 g
m2 (to-you) = 280 * 10/100 = 28 g
m3 (solution) = 120 + 280 = 400 g
w% = (28 + 48) * 100/400 = 19%
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