posted by Emma on .
3.a solution has 64 grams of HI dissolved in 250 L of water. what is its [H+]
4. What is the pH of the solution in question #3?
5. A solution has 189 grams of HNO3 dissolved in 1000 L of water. What is pH?
First off, remember HI is a strong acid; i.e., it ionizes 100%. Therfore, (H^+) = (HI).
mols HI = grams/molar mass
M HI = mols HI/L solution
(H^+) = (HI)
pH = -log(H^+)
5 is done the same way since HNO3 is a strong acid also. I should point out it is stated incorrectly. The way it is stated apparently doesn't take into account that the solution volume is not the same as the added H2O. By the way, is that 1000 L or 1000 mL.
What is the pH of the solution in question 3