1. Howden School and Technology College 7E Acids and Alkalis Curing indigestion

2. Howden School and Technology College Objective To explain which cure for indigestion works the best and why

3. Howden School and Technology College What is indigestion?

4. Howden School and Technology College Possible cures 1 23

5. Howden School and Technology College What the cures claim? All three cures claim to be the best All three are alkalis Brioschi contains 10% sodium hydrogen carbonate Rennie contains 30% sodium hydrogen carbonate Pept-Eez contains 60% sodium hydrogen carbonate

6. Howden School and Technology College LevelIn my plan, I can....... 3 make a simple prediction 4 make a prediction 5 make a prediction, using scientific knowledge and understanding 6 make a prediction, using simple models and theories Making Predictions

7. Howden School and Technology College Method –Add 10cm 3 of acid to each of the test tubes (CAREFUL) –Add 3 drops of universal indicator –Record the colour and pH of the three solutions 1 23

8. Howden School and Technology College LevelIn my experiment, I can....... 3 use simple equipment to make measurements e.g. length and mass make basic observations 4 make enough measurements and/or observations for the investigation 5 make a series of measurements and/or observations that are accurate spot that a result is odd and repeat the experiment Obtaining Evidence

9. Howden School and Technology College Was your prediction correct?

10. Howden School and Technology College LevelIn my plan, I can....... 3 explain why a test is fair 4 decide if a fair test is needed and describe how to make the test fair 5 say which are the key variables 6 identify the most important key variables that need to be controlled Controlling Variables