Which solution is more concentrated with the given concentration a 1% HCI solution b 1ppm HCI solution c the concentration of these solutions are equal

Question

Which solution is more concentrated with the given concentration

a 1% HCI solution

b 1ppm HCI solution

c the concentration of these solutions are equal

Answer 1

Answer - (A) 1% HCl solution

For comparison, we want to use the same units, so we can either convert % to ppm or ppm to %.

Let's convert ppm to % and then compare the two solutions. Recall that % is grams per 100 mls.

1 ppm = 1 mg / L

1 mg/L HCl = 1 mg/1000 ml = 0.1 mg/100 ml = 0.0001 g/100 ml = 0.0001% HCl

Comparing this to the other solution that is 1% HCl, we see that the 1% solution is more concentrated.