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Unformatted text preview: pokharel (yp624) – Pre-lab 2 – Lyon – (53295) 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 2) 1.0 points Which property of sodium chloride will be used for its separation from silicon dioxide and calcium carbonate in the experimental procedure? 1. solubility in water correct 2. greater density than water 3. sodium chloride will not be separated from the other components in this experi- ment 4. reactivity with HCl Explanation: 002 (part 2 of 2) 1.0 points Is this a physical property or a chemical prop- erty? 1. It is a physical property because it does not involve changing the chemical formula of NaCl. correct 2. It is a chemical property because chemi- cals don’t have physical properties. 3. It is both a physical property and a chem- ical property. 4. It is a chemical property because the chemical formula of NaCl changes during the process. Explanation: 003 (part 1 of 2) 1.0 points Which property of calcium carbonate will be used for its separation from silicon dioxide in the experimental procedure? 1. reactivity with HCl correct 2. larger particle size than silicon dioxide 3. solubility in water 4. greater density than water Explanation: 004 (part 2 of 2) 1.0 points Is this a physical property or a chemical prop-...
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- Spring '10
- Sodium, Sodium chloride, SiO2