Does hydrogen react with metal?
Hydrogen react with metals and hydrides are formed.
Do acids react with metals that are more or less active than hydrogen to form a compound of the metal and hydrogen gas?
When acids react with metals, they form salts + hydrogen. If they react with metal oxides/hydroxides, the produce salts + water Examples Acid + Metal --> Salt + Hydrogen H2SO4 + Mg --> MgSO4 + H2 2HCl + 2Na --> 2NaCl + H2 Acid + Metal Oxide --> Salt + Water H2SO4 + MgO --> MgSO4 + H2O 2HCl + Na2O --> 2NaCl + H2O
Hydrogen gas is given off when any acid reacts with metals. Acids must have at least 1 hydrogen in order to be recognized as an acid, so the metal takes the place of a hydrogen when it reacts and the metal becomes an ionic compound with whatever the hydrogen was bonded to in the acid and the hydrogen is on its own and is H2 gas.