EXAM 3 - Mantooth, Marlo Exam 3 Due: Mar 9 2007, 1:00 pm...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Mantooth, Marlo – Exam 3 – Due: Mar 9 2007, 1:00 pm – Inst: Donna C Lyon 1 This print-out should have 20 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. The due time is Central time. 001 (part 1 oF 1) 10 points Which acid has the strongest conjugate base? 1. HCl 2. HClO 2 3. HClO correct 4. HClO 3 5. HClO 4 Explanation: The weakest acid will have the strongest conjugate base. Remember that the more oxyzen atoms that surround an acid, the stronger it becomes. This means that HClO is the weakest acid listed above, so it will have the strongest conjugate base. 002 (part 1 oF 1) 10 points IdentiFy the Lewis Base in the reaction SO 2 + B± 3 O 2 SB± 3 . 1. 3 2. O 2 SB± 3 3. SO 2 correct Explanation: S O O B ± ± ± SO 2 has alone pair oF electrons which it shares in a coordinate covalent bond with the electron-poor B± 3 . 003 (part 1 oF 1) 10 points 50.0 mL oF an HCl solution with a pH oF 3.5 neutralizes 200.0 mL oF a Ca(OH) 2 solution. What is the molarity oF the Ca(OH) 2 solu- tion? 1. 2 . 11 × 10 - 5 M 2. 7 . 91 × 10 - 5 M 3. 3 . 95 × 10 - 5 M correct 4. 0.0342 M 5. 4 . 55 × 10 - 6 M 6. 1.69 M 7. 1 . 78 × 10 - 4 M 8. 1 . 58 × 10 - 4 M 9. 14.3 M Explanation: 004 (part 1 oF 1) 10 points What is the pH oF a 0 . 06 M Ba(OH) 2 aqueous solution? 1. 9 . 80939 2. 0 . 920819 3. 8.7 4. 13 . 0792 correct 5. 1 . 30792 Explanation: [Ba(OH) 2 ] = 0 . 15 M Ba(OH) 2 is a strong base which dissociates in aqueous solution to produce two moles oF OH - For every mole oF Ba(OH) 2 , so 0 . 06 M Ba(OH) 2 produces 0 . 12 M OH - . Ba(OH) 2 Ba 2+ + 2 OH - ini 0 . 06 M 0 M 0 M Δ - 0 . 06 M +0 . 06 M 2(0 . 06 M) fn 0 M +0 . 06 M +0 . 12 M
Background image of page 1

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

View Full DocumentRight Arrow Icon
Mantooth, Marlo – Exam 3 – Due: Mar 9 2007, 1:00 pm – Inst: Donna C Lyon 2 pH = 14 - pOH = 14 - ( - log 0 . 12) = 13 . 0792 005 (part 1 of 1) 10 points Based on your new-found knowledge of the pH scale, indicate whether a solution with H + concentration 4 . 0 × 10 - 12 M is acidic, basic, or neutral. 1.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/28/2009 for the course GE 206E taught by Professor staff during the Spring '09 term at University of Texas at Austin.

Page1 / 5

EXAM 3 - Mantooth, Marlo Exam 3 Due: Mar 9 2007, 1:00 pm...

This preview shows document pages 1 - 3. Sign up to view the full document.

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