If an HCl solution has a concentration of 0.1 M and it requires 30 mL to reach the end point, and during the titration, 15 mL of NaOH solution is used, what is the molarity of the NaOH solution?
Correct answer: B. 0.2 M
- A. 0.1 M
- B. 0.2 M
- C. 0.3 M
- D. 1M
- E. 2 M
Explanation
Calculate the molarity by using the formula: M acid X V acid = M base X V base 0.1 M X 30 mL = M base x 15 mL M base =0.2 M Notice that as long as the units of volume are the same, they cancel out of the equation.
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