Question

For the balanced equation shown below, if the reaction of 40.8 grams of C6H6O3 produces a...

For the balanced equation shown below, if the reaction of 40.8 grams of C6H6O3 produces a 39.0% yield, what is the theoretical yield and how many grams of H2O would be produced?

(C = 12.01 amu, H = 1.01 amu, O = 16.00 amu)

C6H6O3 + 6 O2 → 6 CO2 + 3 H2O

Theoretical yield = Blank 1 grams of H2O

Actual yield = Blank 2 grams of H2O

Homework Answers

Answer #1

1)

Molar mass of C6H6O3 = 6*MM(C) + 6*MM(H) + 3*MM(O)

= 6*12.01 + 6*1.01 + 3*16.0

= 126.11 g/mol

mass of C6H6O3 = 40.8 g

mol of C6H6O3 = (mass)/(molar mass)

= 40.8/126.11

= 0.3235 mol

From balanced chemical reaction, we see that

when 1 mol of C6H6O3 reacts, 3 mol of H2O is formed

mol of H2O formed = (3/1)* moles of C6H6O3

= (3/1)*0.3235

= 0.9706 mol

Molar mass of H2O = 2*MM(H) + 1*MM(O)

= 2*1.01 + 1*16.0

= 18.02 g/mol

mass of H2O = number of mol * molar mass

= 0.9706*18.02

= 17.5 g

2)

% yield = actual mass*100/theoretical mass

39.0= actual mass*100/17.5

actual mass=6.82 g

Theoretical yield:17.5 g

Actual yield : 6.82 g

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