DC91223
Price: FREE
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Pink swirls appear as ammonia gas diffuses across a filter-paper membrane into phenolphthalein solution. Molecules in motion!
Bottle, Gas Collecting, Flint Glass, 240-mL
Item No. GP9148$3.88
Filter Paper, Qualitative, 7.5 cm
Item No. AP3101$11.52
Beakers, Borosilicate Glass, 400-mL
Item No. GP1025$8.82