Stoichiometry
Name:
A17
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Date: _ __
-"'lnsider the following balancea equation:
2AI(s) + 3CUCI2(aq)
2AICI3(aq) + 3Cu(s)
-7
1. How many moles of aluminum metal are required to c9mpletely react with 4.52 moles of 11
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copper (II) chloride?
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2. If 15.3 moles of copper metal were formed iii this reaction, how many moles of aluminum I
Ctr{ would you have started with?
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3. How many moles of aluminum chloride could you produce from 3.66 moles of aluminum A I \ AIC.h metal?
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. - - " If you had a piece of aluminum foil that had a mass of 27 grams (that's exactly one mole of
-~ aluminum), how many moles of copper would you produce?
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For questions 5 -7, refer to the following reaction:
Ethane (C2He) combusts completely in the presence of oxygen to form
carbon dioxide and water
5. Write a balanced chemical equation for this reaction.
JC]H&
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t­
6HaO
6. How many moles of water would form if only 0.5 moles of ethane combusted?
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7. How many moles of carbon dioxide would be formed if 3 moles of ethane combusted?
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For questions 8 -12, consider the reaction between aqueous hydrogen chloride and solid
magnesium metal.
8. Write a balanced chemical equation for this reaction and identify it as to type (combination,
decomposition, etc.)
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8. Hc..( + ""\j
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9. How many liters of hydrogen gas at STP will be produced if 4S.00 g of magnesium metal
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completely reacts? f~ ;;..
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10. What mass~ magnesium chloride would be formed i~ t,he above example (f)?
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11. What mass of magnesium metal would be required to produce SO.OO L of hydrogen gas at
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STP?
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12. How many moles of hydrogen chloride would be needed to completely react 12S.0 g of
magnesium metal? l.' ;;? ' ) = 5 WrY' C l: ) ,f--\)
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For questions 13 -15 consider a reaction between a solution of HN03 (nitric acid) and aqueous aluminum chloride. 13. Write a balanced chemical equation for this reaction and identify it as to type .
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14. If 126 grams of nitric acid reacted completely, what masses of both products would be
AJO '> Ai ~) J-I (JJ
, prod~~? (In other words, do 2 calculations)
!-f)J03 - 6 ')/)1i[
12(; =- ;) WI c G:> s HN0
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1S. The cfi~e-containing product of this reaction is a gas. Calculate the volume of1fiis gas in
liters formed when 100.0 g of aluminum chloride reacts completely at STP. Lil (1, -:; i 3).j'';-fhf
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