How does the length of Magnesium affect the rate of reaction?

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How does the length of Magnesium affect the rate of reaction?

Input Variables – Magnesium strip

Hydrochloric acid

Outcome Variable - Release of hydrogen

I have chosen to investigate whether the difference in length of a
Magnesium ribbon, would change the speed in which the reaction between
Hydrochloric acid and Magnesium takes. We will measure this by timing how long until the magnesium strip vanishes and there is no release of

Aim: I am trying to find out whether the length of Magnesium causes any alterations in the rate of reaction between Hydrochloric acid and
Magnesium. I will be measuring this by timing how long it takes for the magnesium to be no longer visible and there is no hydrogen
…show more content…
Moreover, I have used Hydrochloric acid of higher concentration, as the more dilute acids were not effective in reacting within the time range allocated for the experiment.

I’ll perform the investigation twice, and include the preliminary results with the main investigation to get a more accurate comparison.
The test will take no longer than an hour.


- Hydrochloric acid
- Test tube rack
- Goggles
- Measuring cylinder
- Test tubes
- Stopwatches
- Magnesium strip

Safety Procedure: Place test tubes in rack properly, secure goggles on and tie long hair back. . Keep Hydrochloric acid at a safe distance away and on a safety mat.


1 - Place 4 test tubes in rack

2 - Measure length of magnesium ribbon and cut into four pieces of 2cm, 3cm, 4cm and 5cm

3 - Place one into each test tube

4 - Measure 10ml of Hydrochloric acid in a measuring cylinder

5 - Pour the acid into one test tube and start one stopwatch in synchronisation

6 – Repeat this action with other 3 test tubes

7 - Stop the stopwatch and record down the timing when it stops fizzing

Results Chart:

Length of 1st attempt 2nd attempt 3rd attempt Averages

2cm 8.00 8.15 9.05 8.40 3cm

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