While adding water to NH4 plus 1 increase PH or decrease
The addition of water to NH4+ will not directly affect the pH of the solution. NH4+ is the ammonium ion, which is a weak acid. When water is added to NH4+, it will dissociate into its conjugate base, ammonia (NH3), and a proton (H+). This reaction will help maintain the pH of the solution at a relatively constant level.
However, if ammonia gas is produced in this process and escapes into the atmosphere, the concentration of the ammonium ion will decrease, potentially leading to a decrease in pH. Additionally, if the solution is highly concentrated with NH4+ ions, the addition of water may dilute the solution and increase the pH. So, the effect of adding water to NH4+ on pH will depend on the specific conditions of the solution.