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Why the weak acid cannot be used as titrant?
If you are titrating a base, using a weak acid as titrant would lead to the formation of a buffer as you added the weak acid. The weak acid would react with the base to form the salt of the weak acid + water, and this would buffer any changes in pH, thus making the titration meaningless.
A 0.361 molar solution of the weak acid HA with a pKa of 4.039 is titrated with a 0.163 molar solution of NaOH. What is the pH of the solution at the equivalence point of this titration?
At the equivalence point of the titration, all the weak acid HA has been neutralized by the strong base NaOH. This results in the formation of the conjugate base A-. The pH at the equivalence point of this titration would be determined by the salt formed by the reaction of the weak acid and strong base, and can be calculated using the Henderson-Hasselbalch equation.
Discussion for acid-base titration experiment?
In an acid-base titration experiment, a solution of known concentration (the titrant) is slowly added to a solution of unknown concentration until the reaction is complete. This allows for the determination of the unknown concentration by measuring the volume of titrant needed to reach the equivalence point. The pH at the equivalence point can indicate the nature of the reaction (e.g., strong acid-strong base, weak acid-strong base) and can be used to calculate the pKa of the weak acid or base involved.
Why is the PH of the midpoint predicted to be the same value as the weak acid?
The pH at the midpoint of a titration of a weak acid with a strong base is equal to the pKa of the weak acid. This is because at the midpoint, the concentrations of the weak acid and its conjugate base are equal, resulting in a buffer solution where the pH is determined by the pKa of the weak acid.
Is CHOOH a weak acid or a weak base?
The formic acid is a weak acid.
What are the different types of titration curves and how do they vary in terms of their shapes and characteristics?
There are three main types of titration curves: strong acid-strong base, weak acid-strong base, and weak acid-weak base. Strong acid-strong base titration curves have a sharp and steep pH jump at the equivalence point. Weak acid-strong base titration curves have a gradual pH change around the equivalence point. Weak acid-weak base titration curves have a more complex shape with multiple equivalence points.
Which indicator is used for the titration of weak acid and strong base?
Phenolphthalein is commonly used as the indicator for the titration of a weak acid and a strong base. It changes color from colorless to pink at the equivalence point of the titration when the weak acid is completely neutralized by the strong base.
What are the examples of acid base titration?
Determination of the concentration of a base by titration with acids or determination of the concentration of an acid by titration with bases. (http://en.wikipedia.org/wiki/Acid-base_titration)
What are the type of conductometric titration?
The types of conductometric titrations include strong acid-strong base titrations, weak acid-strong base titrations, weak base-strong acid titrations, and precipitation titrations. Conductometric titrations measure the change in electrical conductivity of a solution as a titrant is added, allowing for the determination of the endpoint of the reaction.
What is the balanced chemical equation for a weak base-strong acid titration?
In a weak base-strong acid titration, the balanced chemical equation is: Base (B) Acid (H) Conjugate Acid (BH) This equation represents the reaction between the weak base (B) and the strong acid (H), resulting in the formation of the conjugate acid (BH).
A titration of an acid and base to the equivalence point results in a noticeably acidic solution It is likely this titration involves?
a weak acid and strong base. At the equivalence point of a titration between a weak acid and a strong base, the resulting solution will have a pH greater than 7, indicating a basic solution. For the solution to be noticeably acidic at the equivalence point, it would suggest an excess of the weak acid after the reaction, which means that the acid is likely weak and not completely neutralized by the strong base.
Will the solution at the end point of an acidbase titration be acidic neutral or alkaline if it is a weak acid and strong base?
The solution at the endpoint of an acid-base titration involving a weak acid and a strong base will be alkaline. This is because the weak acid will have been neutralized by the strong base, resulting in excess hydroxide ions in the solution causing it to be alkaline.
Which of the following is titrated using strong bases?
Titration is the controlled neutralisation of an acid and a base. If the titration is done using a weak acid and a strong base, it can be analysed in detail and all concentrations of the aqueous species at any volume addition of the titrant can be determined.
What is buffer solution in titration?
A buffer solution in titration helps maintain a relatively constant pH during the titration process. It is composed of a weak acid and its conjugate base (or a weak base and its conjugate acid). This helps prevent large changes in pH that could affect the accuracy of the titration.
Why titration of weak acids and weak bases are not done?
It is difficult to determine the end point of such a titration, because the titration produces a buffer solution that changes its pH very slowly at the end point, in contrast to reaction between a strong acid and strong base.
Why titration of weak acid and weak base not done?
Titration of a weak acid and weak base is not typically done because it results in a complex equilibrium system with multiple equilibria involving the dissociation of both the acid and base. This can lead to difficulties in determining the equivalence point accurately and can make the calculations more complex. Strong acids and bases are typically used in titrations since they undergo complete dissociation.
What is the method to calculate the pH at the equivalence point for a titration involving a strong acid and a weak base?
To calculate the pH at the equivalence point for a titration involving a strong acid and a weak base, you can use the formula pH 7 (pKa of the weak base). This is because at the equivalence point, the solution contains only the conjugate acid of the weak base, which determines the pH.
