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CO2
hydrogen
No acid is formed. The reaction produces hydrogen gas and magnesium chloride, a salt.
H2s
No gas is released when sulphur is added to dilute hydrochloric acid.
Chlorine gas (Cl2)
Hydrogen
hydrogen
CO2
hydrogen
Pure Hydrochloric Acid is a gas.
No acid is formed. The reaction produces hydrogen gas and magnesium chloride, a salt.
NaCl salt is formed and H2 gas is given off
Hydrogen sulfide (H2S) is released.
H2s
No gas is released when sulphur is added to dilute hydrochloric acid.
Those compounds, calcium and hydrochloric acid, produce hydrogen (gas)