SOLUTION: A student mixes 15 milliliters of 20% hydrochloric acid solution, 5 milliliters of 75% hydrochloric acid, and 20 milliliters of 40% hydrochloric acid solution. What percent is the

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Question 1184948: A student mixes 15 milliliters of 20% hydrochloric acid solution, 5 milliliters of 75% hydrochloric
acid, and 20 milliliters of 40% hydrochloric acid solution. What percent is the final mixture - give your answer to the nearest percent?
Found 2 solutions by Alan3354, josgarithmetic:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
A student mixes 15 milliliters of 20% hydrochloric acid solution, 5 milliliters of 75% hydrochloric acid, and 20 milliliters of 40% hydrochloric acid solution. What percent is the final mixture
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15 ml @ 20% --> 3 ml of acid
5 ml @ 75% --> 3.75 ml of acid
20 ml @ 40% --> 8 ml of acid
= 14.75 ml of acid in 40 ml of solution
% of result = 100*14.75/40

Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
%28%28pure%29%2F%28volume%29%29%2A100

%280.2%2A15%2B0.75%2A5%2B0.4%2A20%29%2F%2815%2B5%2B20%29--------as the decimal fraction. Multiply this by 100. That's the percent.