Photo AI
Magnesium reacts with dilute hydrochloric acid to produce magnesium chloride and hydrogen gas - Edexcel - GCSE Chemistry - Question 5 - 2018 - Paper 1
Question 5
Magnesium reacts with dilute hydrochloric acid to produce magnesium chloride and hydrogen gas. (a) (i) Write the word equation for the reaction. (ii) State the for... show full transcript
Worked Solution & Example Answer:Magnesium reacts with dilute hydrochloric acid to produce magnesium chloride and hydrogen gas - Edexcel - GCSE Chemistry - Question 5 - 2018 - Paper 1
Step 1
Step 2
Step 3
Step 4
Describe how the student should use the apparatus and materials listed to show how changing the concentration of the hydrochloric acid affects the rate of this reaction.
Answer
To investigate how changing the concentration of hydrochloric acid affects the rate of reaction with magnesium:
- Measure Acid Volume: Select a fixed volume of hydrochloric acid for each trial.
- Prepare Magnesium Ribbon: Cut equal lengths of magnesium ribbon to ensure consistent surface area for reaction.
- Set Up Apparatus: Place the magnesium ribbon in a conical flask and add the hydrochloric acid.
- Collect Gas: Connect the gas syringe to the flask to measure the volume of hydrogen gas produced.
- Start Timing: Begin a stopwatch immediately after adding acid to the magnesium and record the time taken for gas production.
- Repeat: Conduct multiple trials using different concentrations of hydrochloric acid while keeping other variables constant (e.g., same length and surface area of magnesium, same temperature) to observe how concentration influences the reaction rate.
By comparing the volume of gas produced in shorter times for different concentrations, the student can conclude that a higher concentration results in a faster reaction.