When Ammonium hydroxide solution is added to aluminium chloride solution, a white precipitate of aluminium Hydroxide is formed along with ammonium chloride solution.

As detergent are basic in nature, the concentration of Hydroxide ions will be high and concentration of hydronium Ions will be less. [Note: When bases are dissolved in water they dissociate into Hydroxide ions]

The pH value of saliva after meal is around 5.8 due to the increased activity of bacteria on the food that we eat at any time.