The factors which influence the rate of reaction between dilute hydrochloric acid and powdered calcium carbonate were investigated - VCE - SSCE Chemistry - Question 1 - 2010 - Paper 1
Question 1
The factors which influence the rate of reaction between dilute hydrochloric acid and powdered calcium carbonate were investigated.
Which one of the following change... show full transcript
Worked Solution & Example Answer:The factors which influence the rate of reaction between dilute hydrochloric acid and powdered calcium carbonate were investigated - VCE - SSCE Chemistry - Question 1 - 2010 - Paper 1
Step 1
A. stirring the mixture
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Answer
Stirring the mixture increases the rate of reaction by distributing the reactants more uniformly, thereby providing more opportunities for collisions.
Step 2
B. heating the reaction mixture
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Answer
Heating the reaction mixture generally increases the kinetic energy of the particles, leading to higher rates of collision and thus a faster reaction.
Step 3
C. increasing the concentration of the acid
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Increasing the concentration of hydrochloric acid will increase the number of acid particles available to react with calcium carbonate, resulting in a higher reaction rate.
Step 4
D. replacing the powder with a lump of calcium carbonate
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Replacing powdered calcium carbonate with a lump reduces the surface area available for reaction, thereby decreasing the rate of reaction. This is the option that would not increase the rate.
