Your lab partner told you that he measured out 25.0 mL of the unknown acid solution. But he actually went above the line on the graduated cylinder (added more than 25.0 mL). Would your final calculated molarity of the unknown acid be higher, lower or equal to the actual concentration

Final calculated molarity of the unknown acid be  lower than the actual concentration.

Explanation:

Volume required unknown acid = V= 25.0 mL

Volume actually measure was more than V that is = V'

V' > V

Molarity of the solution is the moles of compound in 1 Liter solutions.

As we can see from the formula that molarity is inversely proportional to the volume of the solution.

We have added more volume than required which will be increase the volume of solution and the molarity of the solution will lower than the actual value.