0
The definition of diluting something is to make it weaker. So when diluting the pH of a solution, you are making it weaker and therefore decreasing the pH level.
Added:
The real answer is somewhat more complicated: In fact it depends on what the original pH (acidity or alkalinity) was before dilution took place, the complicating factor is that dilution is (supposedly) done with water that by itself contains both H+ AND OH- ions (in neutral water both are very low, concentration of 1.0*10-7 mol/L, that's why the pH of water is 7.0!)
Answer: On dilution with water pH always tends to 7, meaning increase of pH value when pH was originally below 7 (acidic, conc. [H+] more than 1.0*10-7 mol/L) AND decreasing pH when it was originally above 7 (alkaline, conc. [H+] less than 1.0*10-7 mol/L or conc. [OH-] more than 1.0*10-7 mol/L)
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Is it true that a ten-fold dilution of a strong acidic solution will decrease the pH by 1?
No, it is false. A ten-fold dilution of an acid will INCREASE the pH by 1 unit. Remember pH is 0-14 where 0 is most acidic. Diluting ten-fold on a logarithmic scale will increase the pH.Conversely, a ten-fold dilution of an alkali/base will increase the pH by 1 unit.
What best describes a stock solution that is used in a dilution?
A stock solution that is used in a dilution is known as a dilute solution. A dilute solution reduces the Ph of a chemical.
How do you decrease pH of a solution without adding any acid?
U can concentrate it evaporate some of the solution that will decrease your PH.
Do bases tend to decrease the pH of a solution?
No, the bases increase the pH of an aqueous solution.
What happens to the pH of hydrochloric acid when it is diluted?
The pH of basic solutions will drop (become less basic) as the solution is diluted. However, if the solution contains a buffer, the pH will remain nearly constant upon dilution.
Is it true that a ten-fold dilution of a strong acidic solution will decrease the pH by 1?
No, it is false. A ten-fold dilution of an acid will INCREASE the pH by 1 unit. Remember pH is 0-14 where 0 is most acidic. Diluting ten-fold on a logarithmic scale will increase the pH.Conversely, a ten-fold dilution of an alkali/base will increase the pH by 1 unit.
What best describes a stock solution that is used in a dilution?
A stock solution that is used in a dilution is known as a dilute solution. A dilute solution reduces the Ph of a chemical.
What does the pH of a dilution measure?
pH is a measure of the hydrogen ion (H+) activity in a solution.
How do you decrease pH of a solution without adding any acid?
U can concentrate it evaporate some of the solution that will decrease your PH.
Do bases tend to decrease the pH of a solution?
No, the bases increase the pH of an aqueous solution.
What happens to the pH of hydrochloric acid when it is diluted?
The pH of basic solutions will drop (become less basic) as the solution is diluted. However, if the solution contains a buffer, the pH will remain nearly constant upon dilution.
Will pH of the acid change after the dilution?
can you be more specific? "the" acid? pH of buffered solutions generally will not change upon dilution, following the henderson-hasselbach. however, pH of strong acids will change, following the standard equation: pH = -log[H+] yerp
Does a base increase or decrease the pH of a solution?
A base will increase the pH of a solution as it will lower the available H+ ions.
How does diluting an acidic or basic solution affect the pH of the solution?
It depends on the pH of the dilutant. if the dilution substance is base the acidic solution will become less acidic moving toward neutral pH, the more it is diluted the less acidic it will become. A base solution will remain base or about 7 pH
What happens to the concentration of hydroxide ions in an alkaline solution on repeated dilution?
The number decreses and the pH lowers
If you took a solution of pH 5 and diluted it with water the pH number would be?
Diluting with water will make this solution more neutral, meaning it will slowly increase to 7, which is the pH value of pure water used for this dilution.
What happens to the buffer solution pH 7 when acid is added?
When acid is added to a buffer solution at pH 7, the pH of the buffer solution will decrease. However, due to the presence of a conjugate base in the buffer solution, the buffer will resist the change in pH and try to maintain its original pH value. This is because the conjugate base will react with the acid and prevent a significant decrease in pH.
