Question

What is the concentration of concentrated ammonia solution?

Answer 1

Conc. ammonia is `15*mol*L^-1`.

Explanation:

See this older answer.

I think Fisher still sells this as ammonium hydroxide, which is a bit of a misnomer, because the actual reagent is `NH_3*H_2O`, an aqueous solution of ammonia. If you get a whiff of these ammonia solutions, it will bring literal tears to your eyes.