Table of Contents
When a weak base is titrated with strong acid the equivalence point is?
acidic
For the titration of a weak base with a strong acid, the pH curve is initially basic and has an acidic equivalence point (pH < 7).
How do you solve a strong acid weak base titration?
When a strong acid is titrated with a weak base the pH at the equivalence point?
In the case of a weak base versus a strong acid, the pH is not neutral at the equivalence point. The solution is in fact acidic (pH ~ 5.5) at the equivalence point.
What will happen if we titrate weak acid with weak base?
In titrations of weak acids or weak bases, however, the pH at the equivalence point is greater or less than 7.0, respectively. The pH tends to change more slowly before the equivalence point is reached in titrations of weak acids and weak bases than in titrations of strong acids and strong bases.
Why does the reaction of a strong acid and a weak base result in an acidic solution?
A strong acid and a weak base yield a weakly acidic solution, not because of the strong acid involved, but because of the conjugate acid of the weak base. A weak acid and a strong base yield a weakly basic solution.
Can a weak base neutralize a strong acid?
When a strong base neutralizes a weak acid, the resulting solution’s pH will be greater than 7.
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Weak Acid-Weak Base Neutralization.
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Weak Acid-Weak Base Neutralization.
| Strength of Acid and Base | pH Level |
|---|---|
| Weak Acid-Strong Base | >7 |
| Weak Acid-Weak Base | pH <7 if Ka>Kb pH =7 if Ka=Kb pH >7 if Ka<Kb |
•
15 Aug 2020
How do you calculate the pH of a strong acid and a weak base?
What happens when a strong acid is titrated with a strong base?
In a strong acid-strong base titration, the acid and base will react to form a neutral solution. At the equivalence point of the reaction, hydronium (H+) and hydroxide (OH-) ions will react to form water, leading to a pH of 7.
How do you calculate the pH of a weak base and strong acid?
Why phenolphthalein is used in strong acid base titration?
Which indicator is used in acid-base titration? Using a phenolphthalein indicator, a strong acid- strong base titration is performed. Phenolphthalein is selected because it changes colour between 8.3-10 in a pH range. In basic solutions, it will appear pink, and clear in acidic solutions.
Why is the pH of a weak acid and strong base titration greater than 7?
Because the conjugate base of a weak acid is weakly basic, the equivalence point of the titration reaches a pH above 7. Conversely, for the titration of a weak base with strong acid, the pH at the equivalence point is less than 7 because only the conjugate acid is present.
What happens when strong acid reacts with weak acid?
But if a weak acid is mixed with a strong acid then we can see a reaction occur. The addition of weak acid to a strong acid produces salts. This is due to the reason that weak acids have a higher pH which is basic, and therefore weak acids act as bases on reaction with strong acids.
How does a strong acid produce a weak base?
It isn’t surprising that 99.996% of the HCl molecules in a 6 M solution react with water to give H3O+ ions and Cl– ions. The stronger of a pair of acids should react with the stronger of a pair of bases to form a weaker acid and a weaker base.
Why should a strong base not be used to neutralize a strong acid?
If the acid and base are both very strong (such as concentrated hydrochloric acid and concentrated sodium hydroxide), a violent reaction will occur. This is why most neutralizers are very weak — to help keep the reaction at a slow pace and lessen the evolution of heat and gas.
How do you neutralize a weak base?
Do strong acids neutralize more base than weak acids?
Why will a strong acid neutralize as much base as a weak acid, if the acids are of the same volume and concentration? A strong acid will dissociate more in solution and thus have a greater number of H+ ions, as far as my understanding goes. The opposite if true for the weak base.
Can a weak acid and strong acid have the same pH?
Strong and weak are descriptors used to indicate how readily the acid dissociates into ions, one of which will be hydrogen. Strong acids dissociate more readily, so will often contribute to a lower pH, but it isn’t the same thing.
How do you calculate the pH of a weak base?
Which indicator is used for strong acid and weak base?
Methyl Orange
In the titration of strong acid and weak base, the indicator used is Methyl Orange.
Why do we use phenolphthalein first then methyl orange?
If you use phenolphthalein, you would titrate until it just becomes colourless (at pH 8.3) because that is as close as you can get to the equivalence point. On the other hand, using methyl orange, you would titrate until there is the very first trace of orange in the solution.