Question

why sodium, potassium and calcium cannot be used to prepare hydrogen from acids

Answer 1

sodium potassium and calcium metals in series the more reactive and more vigorously it reacts with water oxygen and acids .they react with cold water to produce hydroxides and hydrogens. these metals can displace hydrogen from acids.

Answer 2

Answer:

Explanation:

sodium, potassium and calcium cannot be used to prepare hydrogen from acids because these  metals in series the more reactive and more vigorously it reacts with water oxygen and acids .they react with cold water to produce hydroxides and hydrogens. these metals can displace hydrogen from acids.

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