Exam01-solutions

Exam01-solutions - jaw2435 – Exam01 – Walker –...

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Unformatted text preview: jaw2435 – Exam01 – Walker – (53985) 1 This print-out should have 26 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. Read all options before choosing one. There may be cases in which more than one response appears to be true. PICK THE RESPONSE that BEST answers the question asked. 001 9.0 points Which type of water can be considered to be pure? 1. chlorinated water 2. bottled water 3. distilled water correct 4. filtered water Explanation: All other forms contain some amounts of dissolved materials. 002 9.0 points The dramatic temperature changes on the moon between day and night are not seen on the Earth because of what property of water? 1. less dense as a solid 2. excellent solvent 3. All of these contribute. 4. high heat capacity correct Explanation: 003 9.0 points Compared to other solvents, water is quite unique. All of the following are unusual prop- erties of water EXCEPT 1. large specific heat. 2. high boiling point. 3. colorless liquid. correct 4. large heat of fusion. 5. large heat of vaporization. Explanation: Water has many unusual properties, but its color is not one of them. Many liquids are colorless, including ethanol. 004 9.0 points What substance would you expect to have the highest boiling point? (Hint: Why does water have a high boiling point?) 1. CO 2 2. CH 3 OH correct 3. SO 2 4. CH 4 5. Cl 2 Explanation: 005 9.0 points Some water is added to an empty glass. A sugar cube is then dropped in and dissolved. The water is the ? and the sugar is the ? . 1. acid; base 2. solute; solution 3. solvent; solution 4. solution; solute 5. solvent; solute correct Explanation: The sugar is dissolved in the water; the water is the solvent and the sugar is the solute. (Generally, the substance present in smaller proportions is the solute and the one present in greater proportions is the solvent.) The total mixture is a solution. 006 9.0 points jaw2435 – Exam01 – Walker – (53985) 2 Water is often described as the “universal solvent” because 1. more substances dissolve in water than in any other common solvent. correct 2. there is more water on Earth than any other common solvent. 3. there is more water in the universe than any other common solvent. 4. everything dissolves in water. 5. most compounds in nature are either ionic or polar. Explanation: Water is the most common solvent and readily dissolves many ionic or polar sub- stances....
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This note was uploaded on 05/01/2008 for the course CH 305 taught by Professor Sutcliffe during the Spring '08 term at University of Texas.

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Exam01-solutions - jaw2435 – Exam01 – Walker –...

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