# PRA011 - When the pH is less than 7 the solution is acidic...

This preview shows pages 1–2. Sign up to view the full content.

pH Practice Worksheet 1) What is the pH of a solution that contains 25 grams of hydrochloric acid (HCl) dissolved in 1.5 liters of water? 2) What is the pH of a solution that contains 1.32 grams of nitric acid (HNO 3 ) dissolved in 750 mL of water? 3) What is the pH of a solution that contains 1.2 moles of nitric acid (HNO 3 ) and 1.7 moles of hydrochloric acid (HCl) dissolved in 1000 liters of water? 4) If a solution has a [H + ] concentration of 4.5 x 10 -7 M, is this an acidic or basic solution? Explain. 5) An acidic solution has a pH of 4. If I dilute 10 mL of this solution to a final volume of 1000 mL, what is the pH of the resulting solution?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Solutions for the pH practice worksheet: The important thing to remember for all of these problems is that pH = -log [H + ], and that [H + ] is equivalent to the molarity of acid present in a solution.
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: When the pH is less than 7, the solution is acidic, when the pH = 7 it is neutral, and when it is greater than 7, it is basic. 1) In this problem, there are 0.685 moles of HCl dissolved in 1.5 L H 2 O, making a total acid concentration of 0.457 M. To find the answer, take the negative log of this to find that the pH = 0.34 2) pH = 1.55 3) pH = 2.53 4) The pH of this solution is 6.35, making the solution very slightly acidic. 5) The pH will be 6. This is solved in the same way that dilution problems are solved. If the pH = 4, this means that the concentration of [H + ] present is 0.0001 M. When you use the dilution equation, M 1 V 1 = M 2 V 2 , where V 2 is 1000 mL, you find that the concentration of acid after dilution is 1.00 x 10-6 , which corresponds to a final pH of 6....
View Full Document

{[ snackBarMessage ]}

### Page1 / 2

PRA011 - When the pH is less than 7 the solution is acidic...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online