Why do acids liberate hydrogen gas only in dilute form when they react with metals?

Answer 1

Hydrogen gas is always created when metals mix with acids because it is the first element and it is always created in a chemical reaction. hope i helped ya! You are assuming that all acids have hydrogen ions to donate. This is not the most rigorous definition for an acid but for this question it will do. for example some acids are H2SO4, HCL, HF, H2CO3 What in effect happens is that the neutral metal and the ionic hydrogen trade states. The metal becomes ionic and the hydrogen become elemental (I don't want to say metallic for hydrogen even if the term does fit in this context.) Ca(s) + H2SO4 -> CaSO4 +H2(g)

Answer 2

It depends upon nature of acid and its strength, Zinc with dilute sulphuric acid gives H2 gas but with concentrated acid gives H2S gas, while copper with concentrated sulphuric acid gives SO2 gas.

Answer 3

Acids liberate hydrogen gas only in dilute form when they react with metals because a higher concentration of acid can lead to a rapid and potentially violent release of hydrogen gas, posing a safety hazard. In dilute solutions, the reaction occurs more steadily and controllably.

Answer 4

Can't remember my teacher told me so, who did this to you? In my opinion this is a misstatement, it is too generally formulated.