100 mL of 1.00 M HCl is added to a 2 g piece of limestone, CaCO3 - VCE - SSCE Chemistry - Question 18 - 2004 - Paper 1
Question 18
100 mL of 1.00 M HCl is added to a 2 g piece of limestone, CaCO3.
Which of the following will not increase the initial rate of this reaction?
A. adding 150 mL of 1 M... show full transcript
Worked Solution & Example Answer:100 mL of 1.00 M HCl is added to a 2 g piece of limestone, CaCO3 - VCE - SSCE Chemistry - Question 18 - 2004 - Paper 1
Step 1
adding 150 mL of 1 M HCl in place of 100 mL of 1 M HCl
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Answer
This option will increase the amount of HCl available for the reaction, thereby increasing the rate.
Step 2
adding 100 mL of 2 M HCl in place of 100 mL of 1 M HCl
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Answer
By using a more concentrated solution, there will be more HCl molecules available, increasing the reaction rate.
Step 3
heating the 100 mL of 1 M HCl before adding it to the limestone
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Answer
Heating the solution will increase the kinetic energy of the molecules, which generally speeds up the reaction rate.
Step 4
adding 100 mL of 1 M HCl to powdered CaCO3 in place of the single piece of limestone
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Answer
This will provide a larger surface area for the reaction between HCl and CaCO3, thus increasing the rate.
