The concentration of hydroxide ion is realted to pH by the pKw (10-14)
At pH 9 the concentration of OH- is 10-5, at pH 3, 10-11. The ratio is 106 so there are a million times as many OH- in pH 9.
A solution with four times as many hydronium ions as hydroxide ions is considered acidic. This is because the excess hydronium ions make the solution more acidic by increasing the concentration of H+ ions compared to OH- ions.
1,000,000 X more
There are 10^6 (1 million) times more hydroxide ions in a solution with a pH of 9 compared to a pH of 3. This is because each unit increase in pH represents a tenfold decrease in hydrogen ion concentration, resulting in a corresponding increase in hydroxide ions.
x 1 000 000
A million
The pH scale is logarithmic, so each unit corresponds to a 10-fold difference in hydrogen ion concentration. Therefore, a solution with a pH of 9 has 1,000,000 (10^6) times more hydroxide ions than a solution with a pH of 3.
There are many. Water itself contains some free hydroxide ions. More common ones include Sodium Hydroxide solution, Potassium Hydroxide Solution, Slaked Lime Slurry, Concrete, Cement etc
A solution with a greater concentration of hydrogen ion (H+) than hydroxide ion (OH-) is an acid while the inverse would be a base.
An acidic solution contains many more H+ ions than OH- ions, and a basic solution has more OH- than H+. A pure water solution, which is neutral, has exactly equal number of each.
According to acid/base theory, acids release H+ ions in solution whereas bases release OH- (hydroxide) ions
The concentration of hydroxide ion is realted to pH by the pKw (10-14) At pH 9 the concentration of OH- is 10-5, at pH 3, 10-11. The ratio is 106 so there are a million times as many OH- in pH 9.
The concentration of hydroxide ion is realted to pH by the pKw (10-14) At pH 9 the concentration of OH- is 10-5, at pH 3, 10-11. The ratio is 106 so there are a million times as many OH- in pH 9.