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exam4chem30a - Exam#4 Chem 30A Spring 2000 Name 1(8 pts a...

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Exam #4 Chem 30A Name_________________ Spring 2000 1. (8 pts) a) Circle the compound(s) that can hydrogen bond. circle circle CH 3 OH CH 4 CH 3 -O-CH 3 CH 3 NH 2 CCl 4 b) Circle the weak acids. circle circle circle HNO 3 H 3 PO 4 HF HBr HC 2 H 3 O 2 H 2 SO 4 2. (12 pts) Suppose that 82.2 mL of ethyl alcohol (CH 3 CH 2 OH) is added to 531 mL of water. Calculate the following. (density of water = 1 g/ mL, density of ethyl alcohol = 0.79 g/mL) a). (m/m) % concentration. 11% b) (m/v) % concentration 11% c) (v/v) % concentration 13.4% d) The molarity of the solution. 2.3 M
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3. (8 pts) What should the final volume in mL of 4.85 g of potassium nitrate be so that the final concentration is 0.845 M? 56.8 mL 4. (8 pts) What weight of solute (NaCl) is needed to produce a 513.2 g solution that is 7.39% (m/m)? 37.9 g NaCl 5.(8 pts) Circle the compounds that you would predict as being non-soluble in water and put a box around the molecules that you would predict as being a strong electrolyte. Box Box Circle HBr KOH C 6 H 12 O 6 (glucose) CF 4 Circle Box CH 3 CH 2 - O-H CH 3 (CH 2 ) 8 CH 3 Na 3 PO 4 6. (12 pts) If a formula is given write the name of the compound. If the name is given write
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