University of Texas CH 302 McCord H10 - Solubility

University of Texas CH 302 McCord H10 - Solubility - byrne...

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

View Full Document Right Arrow Icon
byrne (cmb3744) – H10: Solubility – mccord – (51620) 1 This print-out should have 16 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points The compound M 2 X 3 has a molar solubility oF 0.0280 M. What is the value oF K sp For M 2 X 3 ? 1. 1 . 66 × 10 - 5 2. 6 . 2 × 10 - 7 3. 1 . 72 × 10 - 8 4. 0 . 000132 5. 1 . 86 × 10 - 6 correct Explanation: 002 10.0 points A solution in equilibrium with solid barium phospate is Found to have a barium ion con- centration oF 5 × 10 - 4 mol/L and a K sp oF 5 × 10 - 23 . Calculate the concentration oF phosphate ion. 1. 3 . 16 × 10 - 10 mol/L 2. 4 . 64 × 10 - 7 mol/L 3. 6 . 32 × 10 - 7 mol/L correct 4. 5 . 77 × 10 - 11 mol/L 5. 2 . 50 × 10 - 64 mol/L Explanation: 003 10.0 points Assume the molar solubility oF silver chromate (Ag 2 CrO 4 ) is represented as x . Which oF the Following expressions correctly expresses the relationship between the molar solubility oF silver chromate and the solubility product constant ( K sp ) For this compound? 1. K sp = 4 x 3 correct 2. K sp = x 2 3. K sp = 2 x 3 4. K sp = 4 x 2 5. K sp = 2 x 2 Explanation: The equation For the dissociation oF Ag 2 CrO 4 is written as Ag 2 CrO 4 2 Ag + + CrO - 4 . The expression For K sp = b Ag + B 2 b CrO - 4 B . Since the molar solubility is x , K sp can be rewritten (in terms oF x ) as K sp = [2 x ] 2 [ x ] = 4 x 3 . b Ag + B = 2 x because For every salt molecule that dissociates, 2 Ag + ions are produced. 004 10.0 points Which oF the Following compounds has the LOWEST molar solubility in water? 1.
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 05/08/2011 for the course CHEM 302 taught by Professor Mccord during the Spring '10 term at University of Texas at Austin.

Page1 / 4

University of Texas CH 302 McCord H10 - Solubility - byrne...

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