1. Magnesium reacts with dilute sulfuric acid to form magnesium sulfate and hydrogen gas - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2021 - Paper 1
Question 1
1. 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 ... show full transcript
Worked Solution & Example Answer:1. Magnesium reacts with dilute sulfuric acid to form magnesium sulfate and hydrogen gas - Edexcel - GCSE Chemistry Combined Science - Question 1 - 2021 - Paper 1
Step 1
State two other variables that should be kept the same.
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Answer
Concentration of the acid.
Surface area (size/shape) of the magnesium ribbon.
Step 2
Which piece of equipment can be used to find the volume of 25 cm³ of sulfuric acid?
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Answer
The appropriate piece of equipment is B. measuring cylinder.
Step 3
State how the student will know that the reaction has finished.
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Answer
The student will know the reaction has finished when there are no more bubbles of hydrogen gas being produced.
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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Answer
At 50°C, the particles have more energy, leading to more frequent and successful collisions between the reactants.
