Question

why do potassium and sodium react with water
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Answer 1

Answer:

In this dramatic demonstration, lithium, sodium, and potassium react with water to produce hydrogen gas and the hydroxides of the metals. Lithium reacts fairly slowly, fizzing. Sodium reacts more quickly, generating enough heat to melt itself and to occasionally ignite the hydrogen gas, producing a yellow-orange flame characteristic of sodium. The potassium reacts violently, immediately bursting into a flame which has the characteristic violet color of potassium. If desired, phenolphthalein may be added to the water to indicate the basic nature of the hydroxide product. The solution turns pink as the metals react to form their hydroxides. These are all soft metals that can be cut with a lab spatula revealing a shiny surface characteristic of metals, but they all corrode quickly on exposure to air. They get softer and more reactive as you move down the period from lithium to sodium to potassium.

Explanation:

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Answer 2

Answer:

Sodium and potassium react with water to produce hydrogen gas and the hydroxides of the metals.

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