Question

to prepare for a lab experiment, ted is making a solution that uses two types of concentrations of hcl (hydrochloric acid): 80 ml of 50% hcl solution, and 120 ml of 20% hcl solution. what is the hci concentration of the mixed solution?

Answer 1

The concentration of the HCL in the mixed solution is 32%

Considering the First solution containing HCl,

80 ml of 50% = 80 x (50/100)

  = 80 x 0.5

  = 40 ml of HCL

Considering the second solution containing HCl,

120 ml of 80% = 120 x (20/100)

  = 120 x 0.2

  = 24 ml of HCl

So, the combined solution will have = 40+ 24

          = 64 ml of HCL

Since the combined  volume of the two solutions was = 80+120

              = 200 ml

As for finding the concentration of HCl in a solution, the required formula is to divide the volume of HCl by the combined volution of the solution.

Therefore, the  concentration of  HCl will be = 64/200

        = 0.32

Which is 32% of HCl

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