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Lumps of zinc react with dilute sulfuric acid - OCR Gateway - GCSE Chemistry - Question 2 - 2021 - Paper 1

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Lumps of zinc react with dilute sulfuric acid. What change would decrease the rate of this reaction? A. Further diluting the sulfuric acid with water. B. Using a l... show full transcript

Worked Solution & Example Answer:Lumps of zinc react with dilute sulfuric acid - OCR Gateway - GCSE Chemistry - Question 2 - 2021 - Paper 1

Step 1

A. Further diluting the sulfuric acid with water.

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Answer

Further diluting the sulfuric acid would decrease the concentration of reactants, which generally results in a slower reaction rate due to fewer acid particles available to collide with zinc lumps.

Step 2

B. Using a larger volume of sulfuric acid.

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Answer

Using a larger volume of sulfuric acid, while it increases the total amount of acid, does not decrease the concentration. Thus, it may not significantly reduce the reaction rate.

Step 3

C. Using warmer sulfuric acid.

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Answer

Using warmer sulfuric acid actually increases the reaction rate because higher temperatures generally increase the kinetic energy of particles, leading to more frequent and effective collisions.

Step 4

D. Using zinc powder instead of zinc lumps.

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Answer

Using zinc powder would increase the surface area available for reaction, which would increase the rate, not decrease it.

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