pH of weak acid and base
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pH of weak acid and base
Can someone explain how to calculate the percent protonated of a weak base once you solved for x in the ICE box?
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Re: pH of weak acid and base
Hi!
Once you solve for X in an ice chart, X will be the value of the [OH-] concentration, and thus the conjugate acid concentration as well. Use the value of X and divide by the initial concentration of the reactant, then multiply by 100 to get the percent protonation. Hope this helps!
Once you solve for X in an ice chart, X will be the value of the [OH-] concentration, and thus the conjugate acid concentration as well. Use the value of X and divide by the initial concentration of the reactant, then multiply by 100 to get the percent protonation. Hope this helps!
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Re: pH of weak acid and base
The percent protonated means how much of the base gained an hydrogen ion. So, to find this we have to take the conjugate acid concentration at equilibrium (which is usually X) and divide it by the initial amount of the weak base * 100. By doing this, you are finding what percentage of the weak base actually reacted with water to gain a H+ ion, which is called protonation.
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Re: pH of weak acid and base
you take x and put it over the initial concentration of the acid and multiply by 100
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Re: pH of weak acid and base
Hi! When trying to find the percent protonated of a weak base (or acid), you are basically trying to find how much of the weak base dissociated, or reacted with water throughout the reaction. Therefore, you would use the ICE Box to find the equilibrium concentrations of each of the species in the reaction. You normally do this by finding an x. Then, you would take that x value and divide it by the initial concentration of the weak base. To find the percentage you would then just multiply by 100.
Hope this helps!
Hope this helps!
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Re: pH of weak acid and base
Once you have x, plug it back in to solve for the concentration of H+. Once you have that, you take the -log[H+] and that gives you the pH.
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Re: pH of weak acid and base
Once you have solved for x, divide it by the initial concentration of the reactant and multiply by 100 to get the percent protonation.
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Re: pH of weak acid and base
You divide X by the initial concentration of the reactant and then multiply by 100 to calculate the percent protonation.
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Re: pH of weak acid and base
Since x should be the [OH-] concentration during protonation, you can divide this value by the initial concentration and multiply by 100% to find the percent protonation.
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