This solution is basic, since it has very little dissolved Hydronium ion. (It has exactly 10-9 hydronium ions per Liter, which is very few. Less hydronium ions means less acidity.)
Remember too that a solution with pH > 7 is basic, and a pH < 7 is acidic.
Remember that pH is a number that represents the concentration of hydronium ion (H+) in a solution. The equation for this is
pH = -log10[H+].
If you have a pH of 9, then you can solve for the concentration of hydronium ions as follows.
pH = 9
-9 = log10[H+]
You can then raise both sides of the equation to the power of 10 in order to eliminate the log.
10-9=10log10[H+]
10-9=[H+] since 10log10[H+] = [H+]
So a pH of 9 indicates a hydronium ion concentration of [H+] = 10-9
A base. Any solution with a hydronium ion concentration of 10-9 mol/l has a pH of 9, the hydroxide ion concentration is 10-5. pKw is 10-14
A solution with pH = 9 is an alkaline solution.
The lower on the scale, the more acid. The higher on the scale, the more alkaline. A pH of 7 is neutral. That makes a pH of 9 an alkaline.
Basic or alkaline. A pH above 7 is basic while one below 7 is acidic.
the weak bases have pH=8 or 9 as the carbonates and bicarbonates the common substances in this range are washing soda , baking soda , soap, lime water and milk.
hand soap
Hand soap
acid
A solution with a pH of 7 compared to a solution with a pH of 9 would be more acidic.
pH 6 is a very weak acid and pH 9 is an alkaline
The higher the pH, the greater the concentration of Hydroxide (OH-) ions. So, the solution with the pH of 9 is your answer.
The PH paper soaks up the solution & tests the liquid, the pH paper will then change colour to show what the solution contains. Although if the paper stays the same colour it means the solution is nutral & safe.
1
A solution with a pH of 7 compared to a solution with a pH of 9 would be more acidic.
acidity or basicity of a solution
pH 6 is a very weak acid and pH 9 is an alkaline
The higher the pH, the greater the concentration of Hydroxide (OH-) ions. So, the solution with the pH of 9 is your answer.
alkaline solution
The PH paper soaks up the solution & tests the liquid, the pH paper will then change colour to show what the solution contains. Although if the paper stays the same colour it means the solution is nutral & safe.
1
Neutral
3 SIMPLES!!!
9
Acetic acid is added to the solution, but the pH of the solution does not change. Sodium hydroxide, a base, is added to the solution, but the pH of the solution does not change.
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.