what could have accounted for a percent yield of less than 100% in this lab? check all that apply. the…

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

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

Answer

Answer:

All of the above options could account for a percent - yield of less than 100%.

  1. The copper chloride did not fully dissolve in water before performing the reaction: If the reactant (copper chloride) is not fully dissolved, not all of it will be available to participate in the reaction, leading to a lower - than - expected amount of product and thus a percent yield less than 100%.
  2. The mass of the copper was not measured with the same accuracy: Inaccurate mass measurements of the product (copper) can lead to an incorrect calculation of the percent yield. If the measured mass of the product is lower than the actual mass due to measurement errors, the calculated percent yield will be less than 100%.
  3. Not all of the copper was collected in the filter: If some of the product (copper) is lost during the collection process (e.g., it adheres to the filter paper or is spilled), the measured mass of the product will be lower, resulting in a percent yield less than 100%.
  4. Not enough time was allowed for all of the aluminum to react: If the reaction is incomplete because there was insufficient time for the aluminum to react completely with the copper chloride, less product (copper) will be formed, leading to a percent yield less than 100%.
  5. There were impurities in the aluminum: Impurities in the aluminum can interfere with the reaction. They may prevent the aluminum from reacting fully with the copper chloride or may react with other substances in the solution, reducing the amount of product formed and resulting in a percent yield less than 100%.

Explanation:

Step1: Analyze reactant dissolution

If copper chloride is undissolved, reaction is incomplete.

Step2: Consider mass measurement errors

Inaccurate mass of product affects yield calculation.

Step3: Evaluate product collection

Loss of product during collection lowers measured mass.

Step4: Examine reaction time

Incomplete reaction due to short time reduces product amount.

Step5: Account for impurities

Impurities in reactant can impede reaction progress.