Practice Exam 2

Practice Exam 2 - 4/29/2008 5da8809f0b2c88ae1dab89868bc2c9...

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5/12/2009 5da8809f0b2c88ae1dab89868bc2c94ba68170c4.doc Name _________________________________________________ This exams consists of three parts; 1. One comic, only for your entertainment, worth = 0 pts 2. 25 multiple choice questions worth 4 pts each = 100 pts on pages 3 – 10 3. Descriptive questions/answers = 100 pts on the pages 11 – 14 Please allocate your time sufficiently to ensure you spend adequate time on all parts of the exam. All the information needed is given in the question/problems with the exception of Specific heat of water is 4.184 J/g ° C 4.184 Joules = 1 calorie. Please select the most correct answer by your own assessment of the multiple choice question. If you answer a question, “I don’t know either ”, you may be subject to Delta College’s policy for grading fairness. Good luck! Chem 111 page 1 Alan Zombeck
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5/12/2009 5da8809f0b2c88ae1dab89868bc2c94ba68170c4.doc Chem 111 page 2 Alan Zombeck
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5/12/2009 5da8809f0b2c88ae1dab89868bc2c94ba68170c4.doc 1. Which one of the following is a nonelectrolyte? a. aqueous barium nitrate solution b. aqueous sodium chloride solution c. aqueous lithium phosphate solution d. aqueous potassium sulfate solution e. non of the above, they are all electrolytes 2. How many moles of ions are produced in solution by dissociation of 1 mole of calcium chloride? a. 2 b. 3 c. 4 d. 6 e. 9 3. In the reaction, K 2 SO 4 (aq) + Ba(NO 3 ) 2 (aq) BaSO 4 (s) + 2 KNO 3 (aq) , which ions are the spectator ions? a. Ba 2 + and SO 4 2 - b. Ba 2 + and K + c. Ba 2 + and NO 3 - d. K + and SO 4 2 - e. K + and NO 3 - 4. Which statement below is correctly worded and states a fact? a. All acids are strong electrolytes and dissociate completely when dissolved in water. b. Some acids are strong electrolytes and ionize completely when dissolved in water. c. Some acids are strong electrolytes and dissociate completely when dissolved in water. d. Some acids are weak electrolytes and ionize completely when dissolved in water. e. Some acids are weak electrolytes and dissociate partially when dissolved in water. Chem 111 page 3 Alan Zombeck
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5/12/2009 5da8809f0b2c88ae1dab89868bc2c94ba68170c4.doc 5. A dynamic equilibrium is soon reached when acetic acid (a weak acid) is dissolved in water. Which of the species shown below is present in largest amount in the solution? a. C 2 H 3 O 2 - b. H + c. HC 2 H 3 O 2 d. H 3 O + e. OH - 6. In a neutralization of a strong acid with a strong base, the net ionic reaction is; a. H 2 (g) with O 2 (g) to form H 2 O(l) b. H 2 (aq) with OH - (aq) to form H 2 O(l) c. H + (aq) with O 2 (g) to form H 2 O(l) d. H + (aq) with OH - (aq) to form H 2 O(l) e. Na + (aq) with OH - (aq) to form NaOH(aq) 7. CH 3 NH 2 is the formula for a molecular base that behaves similar to NH 3 . When this base is dissolved in water a small fraction of it ionizes.
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This note was uploaded on 04/28/2008 for the course CHEM 111 taught by Professor Zombeck during the Winter '07 term at Saginaw Valley.

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Practice Exam 2 - 4/29/2008 5da8809f0b2c88ae1dab89868bc2c9...

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