The ph of a fruit juice is 3.6. find the hydronium ion concentration, left bracket upper h 3 upper o superscript plus right bracket , of the juice. use the formula phequalsnegative log left bracket upper h 3 upper o superscript plus right bracket.

PH = - log[H₃O⁺] 3.6 = - log[H₃O⁺] [H₃O⁺] = antilog (-3.6)

[H₃O⁺] = 2.51 x 10⁻⁴ M

Hence the [H₃O⁺] in given fruit juice is 2.51 x 10⁻⁴ M.

If the pH > 7, then the solution is basic. If the pH < 7, then the solution is acidic. If the pH = 7, then the solution is neutral.

According to the pH, since the juice has pH value as 3.6, it is a slightly acidic solution.