NaCl remaining has a mass of 0.724g. What was the mass % of NaCl in the solution?
2007-07-18 04:35:44 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Mass percent can be found by dividing the mass of the solute, which in this case is NaCl, by the mass of the solution. Since the NaCl remaining has a mass of .724 g, and the mass of the solution is 10.416 g, the mass percent would be .724g/10.416g, which is about 6.95%. The fact that the solution has a volume of 10 mL is unnecessary to know in order to solve this problem.
2007-07-18 06:12:57 · answer #1 · answered by Dar-Ci C 1 · 0⤊ 0⤋
% mass NaCl = mass NaCl / total mass * 100%
% mass NaCl = 0.724g / 10.416g * 100%
% mass NaCl = 0.0695g * 100%
% mass NaCl = 6.95%
2007-07-18 11:42:47 · answer #2 · answered by Anonymous · 0⤊ 0⤋
6.95%
Just divide 0.724 by 10.416, the total. Then convert the decimal 0.0695 to percent.
2007-07-18 11:39:26 · answer #3 · answered by Anonymous · 1⤊ 0⤋
72.4/10.416
2007-07-18 12:11:22 · answer #4 · answered by ag_iitkgp 7 · 0⤊ 0⤋