Lab 15 Dilution of Acids

Problem question: What results do we get with acids when a serial 1 to 10 dilution is performed?

General: Write up a procedure for a 1 to 10 dilution of 0.1 M HCl (acid)

Procedure:

1) Materials: Water. HCl, paper towel, SEPUP trays, indicator (universal), ipad

2) Using a clean graduated cylinder make up .1 HCl solution ( 20 ml 0.5 add 80 ml of water)

3) Place 20 drops of .1 M HCl solution into cup #1

4) Take 1 drop from cup #1 and place it in cup #2. Add 9 drops of water to cup #2

5) Continue the same process in 4) through cup #8

6) Place 20 drops of water in cup #9

7) Place 1 drop of universal indicator into cups 1-9

8) Place a piece of paper behind the SEPUP tray and label the paper with the appropriate concentrations for each cup

9) Take a picture with the iPad

Results: