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Hydrogen from Acids

A metal which...

Question

A metal which silvery appearance is slowly tarnished in air it reacts with boiling water and involve hydrogen gas dilute HCl reacts vigorously with the metal evolving hydrogen gas identify the metal and give the chemical equations

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Solution

Dear student

The metal is Magnesium, it has a silvery white appearance. Magnesium reacts with hot water and produces H_2.
Mg (s) + 2H₂O (l) →Mg(OH)₂(s) + H₂ (g)

When magnesium metal reacts with dil. HCl, it forms magnesium chloride and hydrogen gas is evolved in the process. The balanced equation for the following reaction can be-
Mg(s) + 2HCl (dil.) -----> MgCl₂ + H2(g)

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