Question

Compute the concentration of HCl for all three trials using the formula molarity = mol / L. Trial 1 (20.61 mL HCl): M Trial 2 (20.06 mL HCl): M Trial 3 (19.67 mL HCl): M

Answer 1

To calculate the molarity of HCl for each trial, the number of moles and volume in liters are needed. The provided reference misses critical data, so the molarity cannot be computed precisely without further information.

Step-by-step explanation:

To compute the concentration of HCl for each trial, we use the formula molarity = moles / liters. It appears we are given the volume of HCl used in each trial but not the amount in moles. Without the number of moles or the initial stock concentration of HCl, we cannot calculate the final concentration directly from the information provided. However, the reference information suggests using the initial concentration and the ratio of the aliquot to the final volume to find the final concentration.

If we assume that the number of moles of HCl is the same in each trial as indicated by the reference (0.0150 moles), we can convert the trial volumes to liters and use them to calculate molarity.

Answer 2

Trial 1 (20.61 mL HCl):

⇒ 0.121 M

Trial 2 (20.06 mL HCl):

⇒ 0.125 M

Trial 3 (19.67 mL HCl):

⇒ 0.122 M

0.123 M.

Step-by-step explanation: