Can you give one example of a solid acid, liquid acid and a gaseous acid?
Be careful, be very, very careful. By definition, an acid is a substance in solution, usually an aqueous solution. What you are probably referring to are compounds that COULD be acids if they were dissolved in water, but until they are dissolved in water they aren’t acids. Take HCl, for instance. As a gas, HCl is called hydrogen chloride. Only when it is dissolved in water does it become hydrochloric acid. The anhydrous liquid, commonly called “hydrogen acetate”, HC2H3O2, or acetic acid, or ethanoic acid, doesn’t take on acidic properties until it is dissolved in water. Then there is benzoic acid, C6H5COOH, which is a weak, organic acid, and it is a solid. ====== Follow up ======= For all of those responders who said that HCl is a “liquid acid”, I must respectfully disagree. Please don’t confuse a substance which is a liquid with a solution. HCl at room temp and 1 atm is a gas, not a liquid. When it dissolves in water it forms a solution, but the HCl itself is not a liquid. Hydrogen fl
