To measure pH's in a variety of solutions and mixtures and to account for the results obtained.
To learn to use pH paper and a pH meter to measure the pH of a given solution...
Many substances can be classified as acids or bases. There are three definitions used to describe acids and bases, but we consider only the Brønsted definition here...
1 30 mL beaker, 1 10 mL graduated cylinder, 1 glass stir rod, 7 medium test tubes, 1 test tube rack, 1 pH meter, 1 pH paper, 1 plastic work surface, 1 deionized water squirt bottle
~25 mL 0.010 M HCl, ~10 mL 0.0010 M HCl, ~10 mL 0.00010 M HCl, ~10 mL 0.010 M HC2H3O2, ~25 mL 0.010 M NaOH, ~10 mL 0.0010 M NaOH...
HCl, NaOH, HC2H3O2 and NH3 are corrosive. They can attack the skin and cause permanent damage to the eyes...
All solutions can be flushed down the sink with plenty of water...
Prior to Class
Please complete WebAssign prelab assignment. Check your WebAssign Account for due dates...
In this experiment, you will be using pH meters. They have electrodes with a thin glass bulb at the tip. They break easily and are costly to replace...
You will use a hard copy of this worksheet to enter data as you work through the experiment in lab. Print the worksheet and bring it with you to the lab.