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Chapter 4: 4.13 (page 202)

What is the percent yield of a reaction that produces 12.5g of the gas freon CF2Cl2 from 32.9 g of CCl4 and excess HF.

\(CC{l_4} + 2HF \to C{F_2}\)

Short Answer

Expert verified

The percent yield is 48.3%

Step by step solution

01

Given data

From the given balanced equation, we can say that 1 mol of CCl4 reacts with 2 moles of hydrofluoric acid in order to produce 1 mol of CF2Cl2 and 2 moles of hydrogen chloride. HF is in excess so the limiting reagent will be CCl4

02

Determine number of moles

Moles of CCl4

\(\begin{array}{l} = \frac{{Given\,mass}}{{Molecular\,weight}}\\ = \frac{{32.9\,g}}{{153.8\,g}}\\ = 0.214\,mole\end{array}\)

= 32.9g/153.8g=0.214 moles

Now we convert moles into mass

= 0.214 mol x 120.91 g/mol= 25.8 g

03

Determine percent yield

The formula for percent yield

\(\begin{array}{l} = \frac{{\Pr oduct\,yield}}{{Theoritical\,yield}} \times 100\\ = \frac{{12.5g}}{{25.8}} \times 100\\ = 48.3\% \end{array}\)

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Most popular questions from this chapter

Assign oxidation state to elements whose atoms are underlined in each of the following compounds or ions:

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Potassium acid phthalate, KHC6H4O4or KHP, is used in many laboratories, including general chemistry laboratories, to standardize solutions of base. KHP is one of only a few stable solid acids that can be dried by warming and weighed. A 0.3420-g sample of KHC6H4O4 reacts with 35.73 mL of a NaOH solution in a titration. What is the molar concentration of the NaOH?

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Indicate what type or types of reaction each of the following represents:

(a) \({H_2}O\left( g \right) + C\left( s \right) \to CO\left( g \right) + {H_2}\left( g \right)\)

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(c) \(Al{\left( {OH} \right)_3}\left( {aq} \right) + 3HCl\left( {aq} \right) \to AlC{l_3}\left( {aq} \right) + 3{H_2}O\left( l \right)\)

(d) \(Pb\left( {N{O_3}} \right)\left( {aq} \right) + {H_2}S{O_4}\left( {aq} \right) \to PbS{O_4}\left( s \right) + 2HN{O_3}\left( {aq} \right)\)

Which is the limiting reactant when 5.00 g of H2 and 10 g of O2 react to form water?

A 0.00215g sample of polystyrene, a polymer composed of carbon and hydrogen, produced 0.00726g of CO2 0.00148g of H2O in combustion analysis. What is the empirical formula for polystyrene?

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