- Measuring cylinder
- 1M hydrochloric acid
- Magnesium ribbon (2cm strips)
- Small beaker (100ml)
- Water bath
- Measure out 25ml of acid.
- Put it into the beaker and use an ice bath to cool it to 5oC.
- Add the magnesium and time how long it takes for all of the magnesium to react.
- Repeat this at 10, 15, 20, 25 and 30oC. Use a larger beaker of warm water to heat the acid.
- Remember to use fresh acid each time.
- You may want to repeat each reading twice to obtain mean values.
Hydrochloric acid is corrosive, it represents a serious hazard to your eyes, safety spectacles must be worn. This reaction is exothermic, it gives out heat energy, take particular care with hot acids.