Question

If 284.4 mL of SO2 is allowed to react with 151.0 mL of O2 (both measured...

If 284.4 mL of SO2 is allowed to react with 151.0 mL of O2 (both measured at 303 K and 51.8 mmHg ), what is the limiting reactant?

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

1-What is the theoretical yield of SO3 ?

2- If 181.5 mL of SO3 is collected (measured at 303 K and 51.8 mmHg ), what is the percent yield for the reaction?

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Homework Answers

Answer #1

Density of SO2 = 2.63

Weight of SO2 = 284.4 x 2.63 = 747.97 gm

Moles of SO2 = 747.97 /64.06 = 11.67Moles

Density of oxygen = 1.43

Weight of oxygen = 151 x 1.43 = 215.93 gm

Moles of oxygen = 215.93 / 32 = 6.74 Moles

O2 is Limiting reagent

theoretical yield of SO3

Maximum 6.74 mole of SO3 will be formed which is equal to (6.74 x 80.06) 540 gm of SO3 (281ml)

Density of SO3 = 1.92

weight of SO3 = 1.92 x 181.5 = 348.48

Moles of SO3 = 348.38 / 80.06 = 4.35 moles

the percent yield for the reaction

181.5 x100 /281 = 64.59%

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