Students will design a buffer that can maintain a pH within a narrow range when certain amounts amounts of acid and base are added. The activity contains enough materials for 15 groups of students as well as a Teacher’s Guide and Student Study Guide Copymasters. This lab meets Big Idea 6, Investigation 16, Primary Learning Objective 6.18.

Kit Includes:
1000mL 0.1M Acetic Acid
1000mL 0.1M Ammonia
1000mL 0.1M Sodium Dihydrogen Phosphate
1000mL 0.1M Citric Acid
1000mL 0.1M Sodium Monohydrogen Citrate
1000mL 0.2M Sodium Hydroxide
1000mL 0.2M Hydrochloric Acid
1000mL pH 7 Buffer
25g Sodium Acetate
25g Sodium Hydrogen Phosphate
25g Ammonium Chloride
50g Sodium Dihydrogen Citrate
50g Sodium Citrate
25g Sodium Chloride

**Materials needed but not supplied:
Precision Balance, 0.01g
Precision Balance, 0.01g
Beakers, 150mL, 250mL
Buret, 50mL
Lab Stands w/Burette Clamps
Graduated Cylinders,10mL, 100mL
pH Meter
Magnetic Stirrer
Stirring Rod
Spatula
Stir Bar
Wash Bottle
Distilled Water