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pH = pKa + log([A-]/[HA])
pH = pKa+log([conjugate base]/[undissociated acid])
The actual meaning of pKa: the negative log of the dissociation constant, which is a measure of strength of an acid/base
when pKa = pH, there is equal concentration of acid and its conjugate base. pKa helps to understand the nature of acid and base like pH:
pKa 2 but 7 but < 10 -- weak base pKa >10 --strong base
Wiki User
∙ 14y ago
Wiki User
∙ 12y agopH is a measure of the concentration of hydronium ions in solution. pKa is a measure of how much an acid wants to dissociate in a solution.
pH has almost no effect on how much a strong acid dissociates. A strong acid added to a mixture drives the pH down by 1 for every 10 times the strong acid concentration goes up (because pH is a log scale--every unit on a log scale represents another power of 10). pH does however have an impact on how much a weak acid dissociates. Of course the pH drops when an acid does dissociate, and weak acids dissociate some, so they are interrelated. An equilibrium is reached. pKa tells you where that equilibrium will be reached and what the final pH will be:
pH = pKa + log([A-]/[HA])
Notice that the only time pH = pKa is when the acid is exactly half dissociated; when [A-] = [HA]. That is the exact point that you want buffer solutions to be. But that's another story.
Wiki User
∙ 11y agoFor buffer solutions the pH and pKa functions are correlated by the following relationship:
pH=pKa+Log([A-]/[HA], in which the second term is defined as conjugated acid [A-] over undissociated acid [HA].
Wiki User
∙ 14y agoIn general , the Henderson- Hasselbach equation is given by:
pH= pKa + log [base]/ [acid]
since the ratio is 1 to 1 : pH = pKa + log 1 , log 1= 0
pH = pKa when the ratio is 1 to 1
Wiki User
∙ 14y agoone is the concentration of H+, the other is the constant that dictate the ability of a substance to release proton to water
Wiki User
∙ 12y agolook up relationship of pKa to pH. (Hasselbach equation). Then convert pKb to pKa by the following relationship: 14-pKb=pKa
Wiki User
∙ 6y agoA simple relation is: pOH = 14 - pH
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What is the pH if pKw is 14.26?
I will assume you are asking about the pH of pure water if pKw is 14.26. The relationship between pH, pOH, and pKw is as follows: pH + pOH = pKw. If it is pure, neutral water (no acids or bases present), then pH = pOH, so: pH + pOH = 14.26 2(pH) = 14.26 pH = pOH = 7.13
If pH equals 4 what is the poh?
The pOH is 6,4.
What if the pH of a solution is 7.6 what is the pOH?
The pOH is 6,4.
What is the the pOH if the pH of a solution is 7.6?
pOH +pH=14 pOH+7.6=14 pOH=(14-7.6)=6.4
What is the solution's pH and pOH?
pH and pOH are a measure of the concentration of the hydronium ions and hydroxyl ions respectively in the solution. pH = -log[H+] pOH = -log[OH-] and they are related: pH + pOH = 14
What is the pH if pKw is 14.26?
I will assume you are asking about the pH of pure water if pKw is 14.26. The relationship between pH, pOH, and pKw is as follows: pH + pOH = pKw. If it is pure, neutral water (no acids or bases present), then pH = pOH, so: pH + pOH = 14.26 2(pH) = 14.26 pH = pOH = 7.13
How can th pH of a solution be calculated if the pOH is known?
We can subtract pOH from 14, using the formula pH + pOH = 14. This is only true at 14 degrees Celsius.
What is the pOH equation How can pOH be determined from pH?
pH + pOH =14
If pH equals 4 what is the poh?
The pOH is 6,4.
What if the pH of a solution is 7.6 what is the pOH?
The pOH is 6,4.
What is the pOH of an acid that has pH of 2?
It will have a pOH of 12. Because pH+pOH=14
How does pH and pOH compare to one another?
pH is -log[H(subscript 3)O+] pOH is the [OH-] pOH = 14 - pH apex
Formula for calculation pH and pOH?
pH + pOH =14
What is the the pOH if the pH of a solution is 7.6?
pOH +pH=14 pOH+7.6=14 pOH=(14-7.6)=6.4
What is the solution's pH and pOH?
pH and pOH are a measure of the concentration of the hydronium ions and hydroxyl ions respectively in the solution. pH = -log[H+] pOH = -log[OH-] and they are related: pH + pOH = 14
What is the pOH of a solution with a pH of 12?
1.8
What is pOH calculation?
pOH is the negative log of the OH- concentration. It is also related to pH by pH + pOH = 14.
