M. p is a shorthand notation for - log . NO 3 - is a spectator ion, so HNO 3 dissociates completely in water and is called a strong acid. You have to know a little about ammonia to answer this example. Adding NaCl to water does not make the solution acidic or basic, it remains a neutral solution. When we get to activity we'll see that the concentration of spectator ions can affect acid-base equilibria by affecting the ionic strength of a solution.
Some salts when added to water make the solution acidic or basic.
Determine if the anion can participate in acid-base equilibria. Determine the overall effect. Adding NH 4 Cl to water. Cl - is a spectator ion. Adding sodium acetate to water.