Question
How would you prepare dihydrogen from a substance other than water?
Solution
1. From acids. Active metals such as Zn, Fe, Mg etc. react with dilute mineral acids (HCl, H2SO4 etc.) to produce dihydrogen gas.
Since metals have displaced hydrogen from the acids, hence their reactions are called displacement reactions.
2. From alkalies: Metals like Zn, Al, Sn, Pb, Sb etc. react with boiling sodium hydroxide solution to liberate hydrogen gas.
Since metals have displaced hydrogen from the acids, hence their reactions are called displacement reactions.
2. From alkalies: Metals like Zn, Al, Sn, Pb, Sb etc. react with boiling sodium hydroxide solution to liberate hydrogen gas.
