Gas Diffusion

Product Details

Safety: Before conducting the lab, review the safety precautions on the student page with the class. Then discuss any safety precautions that are specific to your science laboratory or classroom. Remind students that concentrated ammonium hydroxide and hydrochloric acid are toxic and corrosive and will cause severe burns. Their vapors are extremely irritating, especially to the eyes and respiratory tract. Students should dispense these reagents in a hood and exercise caution. Students should not handle the soaked cotton balls with bare hands. Instead, they should use forceps and wear chemical-resistant gloves. Remind students that phenolphthalein indicator solution contains alcohol and is flammable. Students should wear chemical splash goggles, chemical-resistant gloves, and a chemical-resistant apron. Students may review current Safety Data Sheets for additional safety, handling, and disposal information.


Materials Included in Kit

Consumable:
Ammonium hydroxide, concentrated 14.7 M, NH4OH, 100 mL
Hydrochloric acid, concentrated,12.1 M, 30 mL
Phenolphthalein solution, 1%, 100 mL
Thymol blue solution, 0.04%, 100 mL
Cotton balls, pkg/300

Non-Consumable:
Glass diffusion tubes, 14-mm wide by 30-cm long, 20
Medicine droppers, glass, 24
Rubber stoppers, size 00, 90

Additional Materials Required
Beral Pipets, Graduated, Pkg. of 20, 1
Bottles, Washing, Polyethylene, 250-mL, 10
Bunsen Burner, Adjustable, Natural Gas, 10
Forceps, 10
Single Buret Clamp, Plastic-Coated Jaw, 20
Support Stand, Economy Choice, 20