Three students are asked to discuss what would happen to calculated molar volume if the magnesium did not react to completion. Which student employs correct scientific reasoning? If the magnesium did not react to completion then the extra hydrochloric acid would add to the final mass calculated for hydrogen gas causing the molar volume to be too high. If the magnesium did not react to completion too much hydrogen gas would be produced causing the stopper to pop out of the Erlenmeyer flask and this would cause the molar volume to be too low. If the magnesium did not react to completion the calculated theoretical moles of hydrogen produced would be too high and this would cause a decrease to the calculated molar volume.

Question

Three students are asked to discuss what would happen to calculated molar volume if the magnesium did not react to completion. Which student employs correct scientific reasoning? If the magnesium did not react to completion then the extra hydrochloric acid would add to the final mass calculated for hydrogen gas causing the molar volume to be too high. If the magnesium did not react to completion too much hydrogen gas would be produced causing the stopper to pop out of the Erlenmeyer flask and this would cause the molar volume to be too low. If the magnesium did not react to completion the calculated theoretical moles of hydrogen produced would be too high and this would cause a decrease to the calculated molar volume.

Answer 1

The correct answer is: If the magnesium did not react to completion the calculated theoretical moles of hydrogen produced would be too high and this would cause a decrease to the calculated molar volume.Explanation: If the magnesium did not react to completion, it means that not all of the magnesium would have reacted with the hydrochloric acid to produce hydrogen gas. As a result, the calculated theoretical moles of hydrogen produced would be too high because the amount of hydrogen produced would be greater than the actual amount produced. This would lead to an overestimation of the molar volume of hydrogen gas, causing it to be calculated as too high.

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