Posted by Fai on .
Calculate the PH concentrated hydrochloric acid if this solution is 24.8% HCL by weight and has a density of 1.16g/ml. I do not understand the right answer 0.90PH Why? Please help
My calculation
1.18g/ml x 1000ml x 0.248/36.5 = 7.8M
I cannot do?

chemistry 
DrBob222,
I think your 7.8 is ok if you carried it out one more place. I obtained 7.88. Then pH = log(H^+) = log(7.88) = 0.8966 which rounds to 0.90 to two s.f.

chemistry 
Fai,
A solution of sodium cyamide nacn has a ph of 12.10. How many grams of nacn are in 425ml of solution with the same PH
Who helps me to solve it for me. Step by step