Urgent Chemistry Help Needed!?

Alex

New member
1) What is the pH and pOH of a solution made by adding water to 15 grams of hydroiodic acid until the volume of the solution is 2500 mL

2) What is the pH and pOH of a solution that was made by adding 400 mL of water to 350 mL of 5.0 x 10 to the power of negative 3 M (mol per liter) NaOH solution?

3) What is the pH and pOH of a solution with a volume of 5.4 L that contains 15 grams of hydrochloric acid and 25 grams of nitric acid?

4) A swimming pool has a volume of one million liters. How many grams of HCl would need to be added to that swimming pool to bring down the pH down from 7 to 4? (Assume the volume of the HCl is negligible)

Please show your work and I would love an explanation of how to do these questions. Thanks in advance for your help!
 
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