Rate of reaction concentration of acid and calcium carbonate *BIG PRACTICAL*

Resources developed as part of a *BIG PRACTICAL*. These are designed to practice a skill - usually using a preliminary investigation - then a full investigation write up. These are tailored toward the way the new GCSE (2016 on wards) is designed to test practical skills as well as context.

First lesson
Resources: Rate-of-reaction-practical (+ppt)
Practical: Pupils complete a preliminary testing three concentrations of HCl on calcium carbonate and collect gas using inverted measuring cylinders.
Activity order: Intro, demo, should be able to complete preliminary practical and write up to preliminary conclusion.

Second/Third lesson
Resources: Rate-of-reaction-practical (+ppt)
Practical: Pupils complete a full practical testing three concentrations of HCl on calcium carbonate and collect gas using inverted measuring cylinders. Complete repeats and exclude outliers to calculate mean.
Activity order: Make any changes to the method necessary from previous prac (e.g. my pupils decided they were going to use larger measuring cylinders). Complete prac and write up.