Lab: Limiting Reactant and Percent Yield

Question 1

Was this hypothesis supported in the lab?✔ yessomewhata littleno

Revolt · Accepted Answer

✔ yes

Question 2

separated from the copperaluminum✔ aqueous solutioncopper(II) chloride.

Revolt · Accepted Answer

✔ aqueous solution

Question 3

The molar mass of Cu is 63.55 g/mol. The number of grams of Cu produced in this reaction is 0.001230.00724✔ 4.9629.3.

Revolt · Accepted Answer

✔ 4.96

Question 4

Determined using stoichiometry: ✔ theoretical yieldexperimental yieldboth

Revolt · Accepted Answer

✔ theoretical yield

Question 5

The percent yield of a chemical reaction is theoretical yieldexperimental yield✔ both theoretical yield and experimental yield.

Revolt · Accepted Answer

✔ both theoretical yield and experimental yield

Question 6

What could have accounted for a percent yield of less than 100% in this lab? Check all that apply.

Revolt · Accepted Answer

The copper chloride did not fully dissolve in water before performing the reaction.; The mass of the copper was not measured with the same accuracy.; Not all of the copper was collected in the filter.; Not enough time was allowed for all of the aluminum to react.; There were impurities in the aluminum.

Lab: Limiting Reactant and Percent Yield Answers

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