quiz4dvb - Version 361 Quiz 4 VANDEN BOUT (53585) This...

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Version 361 – Quiz 4 – VANDEN BOUT – (53585) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points Which oF the Following solutions oF weak acids has a hydronium ion concentration that is most accurately calculated by [H 3 O + ] = ( K a C a ) 1 / 2 1. CH 3 COOH, K a = 1 . 8 × 10 - 5 , C a = 0 . 01 M correct 2. CH 3 COOH, K a = 1 . 8 × 10 - 5 , C a = 0 . 001 M 3. HCOOH, K a = 1 . 8 × 10 - 4 , C a = 0 . 01 M 4. HCOOH, K a = 1 . 8 × 10 - 4 , C a = 0 . 001 M Explanation: 002 10.0 points Solid Mg(OH) 2 , which has a solubility prod- uct constant oF 1 . 5 × 10 - 11 , dissolves in water when NH 4 Cl is added to the solution because 1. OH - ion reacts with Cl - ion to Form the weak acid HClO. 2. one oF the ions From Mg(OH) 2 is oxidized to Form a di±erent species. 3. OH - ion is converted to NH 4 OH by reac- tion with NH + 4 . correct 4. Mg +2 Forms a very stable complex ion with ammonia. 5.
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quiz4dvb - Version 361 Quiz 4 VANDEN BOUT (53585) This...

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