Testing indigestion tablets
The principle is that the stomach produces hydrochloric acid. This acid provides a medium for the digestion of protein by the enzyme protease. It also kills microbes that may be in the food. An excess of acid can lead to indigestion and indigestion tablets (may) work by neutralising the excess acid. The practical is also an interesting way of discussing what is meant by the best result and there are lots of opportunities to discuss fair testing, evaluating and alternative methods.
The practical is most suitable for Key Stage 3, when discussing acids, alkalines and pH. It can also be used to explore the importance of preliminary work (pH changes are only obvious when the acid is added to the indigestion tablets, not the other way around). The understanding can then help when doing science course work.
Photographs taken at High View School and Technology Centre between 1990 and 2004
Testing indigestion tablets
The principle is that the stomach produces hydrochloric acid. This acid provides a medium for the digestion of protein by the enzyme protease. It also kills microbes that may be in the food. An excess of acid can lead to indigestion and indigestion tablets (may) work by neutralising the excess acid. The practical is also an interesting way of discussing what is meant by the best result and there are lots of opportunities to discuss fair testing, evaluating and alternative methods.
The practical is most suitable for Key Stage 3, when discussing acids, alkalines and pH. It can also be used to explore the importance of preliminary work (pH changes are only obvious when the acid is added to the indigestion tablets, not the other way around). The understanding can then help when doing science course work.
Photographs taken at High View School and Technology Centre between 1990 and 2004