Ch 10 more Acid and Base

Ch 10 more Acid and Base - 3.0 x 10-9 M 3. a. pH = 4.1202...

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

View Full Document Right Arrow Icon
Chem 101 Dr. Nielson More Problems for Chapter 10 1. Find the following for a 0.025 M Ca(OH) 2 solution. a. [ - OH] b. [H 3 O + ] c. pH 2. Determine [H 3 O + ] in each of the following solutions. a. 0.0027 M HCl solution b. 4.9 x 10 -10 M NaOH solution c. a solution with a pH 8.52 3. Find the pH for each of the following solutions. Report your answer to the correct number of significant figures. a. 7.583 x 10 -5 HNO 3 solution b. 0.00093 Ba(OH) 2 solution c. a solution prepared by dissolving 10.83 g of HBr in 1.00 L of water 4. A solution of 0.500 M NaOH is used to neutralize 26.7 mL of a H 2 SO 4 solution. If 42.5 mL of the NaOH solution is required to reach the endpoint, what is the molarity of the acid solution? 5. Is a solution that is 1.0 x 10 -8 M HClO 4 acidic, basic, or neutral? 6. Predict whether a solution of Na 2 SO 4 is acidic, basic, or neutral? Briefly explain why.
Background image of page 1

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

View Full DocumentRight Arrow Icon
Key 1. a. [ - OH] = 0.050 M b. [H 3 O + ] = 2.0 x 10 -13 c. pH = 12.70 2. a. 0.0027 M b. 2.0 x 10 -5 M c.
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 3.0 x 10-9 M 3. a. pH = 4.1202 b. pH = 11.27 [dont forget that there are 2 moles of -OH for every one mole of Ba(OH) 2 ] c. pH = 2.62 4. 0.398 M H 2 SO 4 5. Strange answer: It is a strong acid, so the solution should be acidic. However if you calculate pH as we normally do for strong acids, then it would seem that pH should equal 8 and the solution is basic. In reality, the solution is so dilute that the self-ionization of water makes more H 3 O + than the HClO 4 . So there must be slightly more acid in solution than that of a neutral solution. The solution should be slightly acidic (although really close to neutral.) 6. A Na 2 SO 4 solution is slightly basic. The Na + cation does not react with water, but the SO 4 2-anion can accept a proton from water to make the weak acid HSO 4-. The H 2 O that donated its proton is now the base OH and the solution is slightly basic....
View Full Document

This note was uploaded on 03/08/2012 for the course CHEM 101 taught by Professor Anderson,w during the Fall '08 term at BYU.

Page1 / 2

Ch 10 more Acid and Base - 3.0 x 10-9 M 3. a. pH = 4.1202...

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

View Full Document Right Arrow Icon
Ask a homework question - tutors are online