Finding a concentration of a solution?
2016-03-02 2:45 am
A student has 100. mL of 0.20 M HCl solution. She takes 5.0 mL of this solution, and adds it to 10.0 mL of water. She then takes 3.0 mL of this new solution for an experiment. What is the concentration of HCl in this solution?
回答 (1)
2016-03-02 2:59 am
✔ 最佳答案
Concentration of the 5.0 mL HCl solution taken = 0.20 MWhen 5.0 mL of the solution is added to 10.0 mL of water, the volume becomes 15.0 mL.
Concentration of the new solution = 0.20 × (5/15) = 0.067 M
Concentration of 3.0 L of the new solution = 0.067 M
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