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Chem 171 F10 Q7 TernMix Tit Key

Chem 171 F10 Q7 TernMix Tit Key - Chem 171 Q7 Version A 1(5...

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Chem 171 Q7 Version A (5 pts each) (Show work, unit, sig fig for full credit) (KEY TernMix /Tit) 1. The following “fill-in the blanks” questions refer to the experiment entitled “Physical Separation of a Ternary Mixture”. a. All sulfides react with strong acids to form H 2 S gas which has the distinctive odor of rotten eggs. b. The process by which a liquid is brought to its boiling point, vaporized, then condensed and collected is known as distillation. 2. The following questions refer to the experiment entitled “Volumetric Analysis: An Acid- Base Titration”. Why do you cover the sodium hydroxide solution? Write the appropriate molecular reaction that occurs if you do not cover the sodium hydroxide solution. Include phases to get full credit. The sodium hydroxide solution is covered because it absorbs CO 2 from the atmosphere very slowly. 2 NaOH (aq) + CO 2 (g) Na 2 CO 3 (aq) + H 2 O(l) Chem 171 Q7 Version B (5 pts each) (Show work, unit, sig fig for full credit) 1. Classify each of the following as a compound, a homogeneous mixture, or a heterogeneous mixture. Ocean Water Apple Juice with Pulp Clean air in a Bottle Air over New York City Oxalic Acid Ocean water is a heterogeneous mixture
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