Consider the following reaction: 2SO2( g )+O2( g )2SO3( g ) Part A If 291.6 mL o

Question

Consider the following reaction:
2SO2(g)+O2(g)2SO3(g)

Part A

If 291.6 mL of SO2 is allowed to react with 156.9 mL of O2 (both measured at 326 K and 52.1 mmHg ), what is the limiting reactant?

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Part B

What is the theoretical yield of SO3?

7.47×104

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Part C

If 174.0 mL of SO3 is collected (measured at 326 K and 52.1 mmHg ), what is the percent yield for the reaction?

Express your answer using four significant figures.

I only need the last part! Percent yield.

Consider the following reaction:
2SO2(g)+O2(g)2SO3(g)

Part A

If 291.6 mL of SO2 is allowed to react with 156.9 mL of O2 (both measured at 326 K and 52.1 mmHg ), what is the limiting reactant?

SO2 O2

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Correct

Part B

What is the theoretical yield of SO3?

nSO3 =

7.47×104

  mol  

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Correct

Part C

If 174.0 mL of SO3 is collected (measured at 326 K and 52.1 mmHg ), what is the percent yield for the reaction?

Express your answer using four significant figures.

=   %  

I only need the last part! Percent yield.

Explanation / Answer

moles of SO3 collected = PV/RT

                                     = 52.1 mmHg * 0.174 L / 0.082 Latm /K/mol326 K

P = 52.1 mm Hg = 52.1 mm Hg * 1 atm /760 mm Hg = 0.069 atm

moles of SO3 collected = 0.069 atm * 0.174 L / 0.082 Latm /K/mol326 K = 4.46*10^-4 moles

% yield = actural yield/ theoretical yield *100 = [4.46*10^-4 moles/ 7.47*10^-4] * 100 = 59.71 %

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