Investigating the Effect of pH on Amylase
1. Place single drops of iodine solution in rows on the tile
2. Label a test tube with the pH to be tested
3. Use the syringe to place 2cm3 of amylase in the test tube
4. Add 1cm3 of buffer solution to the test tube using a syringe
5. Use another test tube to add 2cm3 of starch solution to the amylase and buffer solution, start the stopwatch whilst mixing using a pipette
6. After 10 seconds, use a pipette to place one drop of mixture on the first drop of iodine, which should turn blue-black
7. Wait another 10 seconds and place another drop of mixture on the second drop of iodine
8. Repeat every 10 seconds until iodine solution remains orange-brown
9. Repeat experiment at different pH values