Magnesium reacts with dilute sulfuric acid to form magnesium sulfate and hydrogen gas - Edexcel - GCSE Chemistry - Question 2 - 2021 - Paper 1
Question 2
Magnesium reacts with dilute sulfuric acid to form magnesium sulfate and hydrogen gas.
A student wants to find out the effect of temperature on the rate of this reac... show full transcript
Worked Solution & Example Answer:Magnesium reacts with dilute sulfuric acid to form magnesium sulfate and hydrogen gas - Edexcel - GCSE Chemistry - Question 2 - 2021 - Paper 1
Step 1
State two other variables that should be kept the same.
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Answer
The concentration of the acid should remain constant to ensure consistency in reaction conditions.
The mass or surface area of the magnesium ribbon should also be controlled to avoid variations in reaction rates.
Step 2
Which piece of equipment can be used to find the volume of 25 cm³ of sulfuric acid?
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Answer
B measuring cylinder. The measuring cylinder is the appropriate equipment to accurately measure out a specific volume of liquid.
Step 3
State how the student will know that the reaction has finished.
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The student will know that the reaction has finished when there are no more gas bubbles being produced, indicating that the magnesium has completely reacted with the acid.
Step 4
Give one reason, in terms of particles, why the reaction at 50°C was faster than the reaction at 30°C.
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At 50°C, the particles have more kinetic energy compared to those at 30°C. This leads to more frequent and effective collisions between the magnesium and the sulfuric acid particles, resulting in a faster reaction.
