In chemistry, what does PH represent?
Answer:
it represents te inverse log of the hydrogen ion concentration. in other words..
pH=-log[H]
it tells you how acidic or basic the solution is
The hydrogen proton (H+) concentration.
pH = -log[H+]
pH = 14 "basic"
pH = 7 "neutral"
pH = 1 "acidic"
pH literally refers to the Percent Concentration of Hydrogen.
The lower to pH, the higher concentration of hydrogen it is which makes the solution more acidic.
pH is a p-value for the H+ concentration of a solution
pH determines acidity where:
pH < 7 : Acidic Solutions, where H+ concentration is greater than that of OH- concentrations.
pH = 7 : Neutral Solutions, where H+ and OH- concentrations are equal.
pH > 7 : Basic Solutions, where OH- concentration is greater than H+ concentration.
In all aqueous (water containing) solutions there is a delicate balance between H+ and OH-. Depending on the compound that is put into the solution, it can then become basic or acidic. For compounds that easily give up a hydrogen ion (proton) such as HCl (hydrochloric acid), the H+ concentration will increase given by the equation:
HCl + H2O --> Cl- + H3O+
H3O+ or hydronium concentration is synonymous with H+ concentration.
For a compound such as NaOH, you will get a basic solution given by the equation:
NaOH --> Na+ + OH-
Just remember, if you are increasing H+ concentration you are decreasing pH and if you are increasing OH- concentration then you are increasing pH. For every 1 pH go up or down, you are changing the H+ concentration by a value of 10. For instance going from pH 5 to pH 3 you are increasing H+ by a value 10*10 = 100 times. If you were going from pH 5 to pH 2 you would increase the H+ concentration by 10*10*10 or 1000 times.
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