final help quiz and answers

final help quiz and answers - Dr. Suggs Final Help Session...

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Dr. Suggs’ Final Help Session FALL 2010
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Question #1 Mixing 20.0 cm 3 of 0.100 M AgNO 3 with 15.0 cm 3 of 0.200 M NaCl produces the following reaction: Ag + (aq) + Cl - (aq) AgCl (s) A. Determine the limiting reactant. B. Determine the theoretical yield of AgCl in grams. C. What is the concentration of the ions left over?
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QUESTION #1 ANSWER M 0.0286 mL 35.0 Cl mmol 1.00 Cl M Cl mmol 1.00 Cl mmols 2.00 Cl mmols 3.00 left Cl mmols # Cl consumed Cl mmols initial left Cl mmols # Na M 0.0857 mL 35.0 1 NaCl mmol 1 Na mmol 1 NaCl mmol .00 2 Na M AgCl g 0.287 AgCl 1mmol AgCl g 0.1433 AgCl mmol 0.0200 : produces it and limiting is nitrate silver Thus, AgCl mmol 00 . 3 NaCl mmol 1 AgCl mmol 1 NaCl mmol 3.00 AgCl mmol 00 . 2 AgNO mmol 1 AgCl mmol 1 AgNO mmol 00 . 2 : produced AgCl of mmols Find NaCl mmol 3.00 mL NaCl mmol 0.200 NaCl mL 15.0 AgNO mmol 00 . 2 mL AgNO mmol 0.100 AgNO mL 20.0 : reagent each of mmols initial the Find 3 3 3 3 3
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QUESTION #2 A.Balance this equation and state which of the six types of reaction is taking place: ____ Mg + ____ HNO 3 ____ Mg(NO 3 ) 2 + ____ H 2 Type of reaction: __________________________ C. If I start this reaction with 40 grams of magnesium and an excess of nitric acid, how many grams of hydrogen gas will I produce? D. If 1.7 grams of hydrogen is actually produced, what was my percent yield of hydrogen?
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QUESTION #2 ANSWERS A. _1_ Mg + _2_ HNO 3 _1_ Mg(NO 3 ) 2 + _1_ H 2 Type of reaction: _Single Replacement Reaction____ C. If I start this reaction with 40 grams of magnesium and an excess of nitric acid, how many grams of hydrogen gas will I produce? D. If 1.7 grams of hydrogen is actually produced, what was my percent yield of hydrogen? 2 2 2 2 H g 3.30 H mol 1 H g 2.00 Mg mol 1 H mol 1 Mg g 24.3 Mg mol 1 Mg g 40.0 % 52 % 100 H g 3.30 H g 1.7 H Yield % 2 2 2 x
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QUESTIONS #3 A. Balance this equation and state what type of reaction is taking place: ____ NaHCO 3 ____ NaOH + ____ CO 2 Type of reaction: __________________________ B. If 25 grams of carbon dioxide gas is produced in this reaction, how many grams of sodium hydroxide should be produced? C. If 50 grams of sodium hydroxide are actually produced, what was my percent yield?
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QUESTION #3: ANSWERS A. Balance this equation and state what type of reaction is taking place: __1__ NaHCO 3 __1__ NaOH + __1__ CO 2 Type of reaction: __decomposition________ B. If 25 grams of carbon dioxide gas is produced in this reaction, how many grams of sodium hydroxide should be produced? C. If 50 grams of sodium hydroxide are actually produced, what was my percent yield? NaOH
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final help quiz and answers - Dr. Suggs Final Help Session...

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