Reactivity of Alkali Metals with Water
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Summary
This video demonstrates the difference in reactivity between lithium, sodium, and potassium when placed in water with phenolphthalein indicator, showing increasing vigor in their reactions.
Highlights
Introduction to Alkali Metals and Setup00:00:04
The demonstration will showcase the varying reactivity of lithium, sodium, and potassium. Each metal is in a small dish, and crystallizing dishes contain water mixed with phenolphthalein indicator to show pH changes during the reactions.
Lithium's Reactivity00:00:36
Lithium metal is placed in water. It bubbles and fizzes, and the water slowly turns pink, indicating a change in pH.
Sodium's Reactivity00:00:55
Sodium metal reacts vigorously with water, melting and producing hydrogen gas that ignites with a burst.
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