Equal amounts of marble chips are reacted separately with 100cm3 of hydrochloric acid of different concentrations. If all the marble chips reacted; which of...

Assessment: WAEC SSCE - Chemistry - 2002 (Objective) Subject: Chemistry

Question 1 Report

Equal amounts of marble chips are reacted separately with 100cm3 of hydrochloric acid of different concentrations. If all the marble chips reacted; which of the following remained the same in each case?
Answer Details
The total mass of gas evolved during the reaction remained the same in each case. This is because equal amounts of marble chips were reacted separately with 100cm3 of hydrochloric acid of different concentrations. Since the same amount of marble chips was used in each reaction, the total amount of gas produced by the reaction will be equal, regardless of the concentration of the hydrochloric acid used. The other options, such as the average rate of evolution of gas, time taken for the reaction to reach completion, and initial reaction rates, may differ depending on the concentration of hydrochloric acid used.
Read lesson note on Kinetic Theory Of Matter And Gas Laws (JAMB)
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