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Reactivity with Air CO2 and Water (Group 1)

Name the thre...

Question

Name the three metals which react with cold water to form hydrogen gas. Support your answer with equally balanced chemical equations.

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Solution

$N a, K, R b$ reacts readily with water to form hydrogen gas & corresponding hydroxide.
$2 N a + 2 H_{2} O ⟶ 2 N a O H + H_{2} ↑$
$2 K + 2 H_{2} O ⟶ 2 K O H + H_{2} ↑$
$2 R b + 2 H_{2} O ⟶ 2 R b O H + H_{2} ↑$

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