The titration of 15.00 mL of hydrobromic acid required 22.96 mL of a 0.1853 M calcium hydroxide to reach the endpoint. Calculate the concentration of the hydrobromic acid

0.57 M

Explanation:

We have to start with the reaction:

Now we have to balance the reaction:

The next step is the calculation of the number of moles of Calcium Hydroxide, so:

If we use the amount of volume in "L" (22.96 mL=0.02296 L), so:

Now, with the balanced reaction we can find the moles of HBr, so:

Finally, with the volume in liters (15.00 mL= 0.015L) we can find the molarity, so:

The concentration of HBr is 0.57 M