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What is the significance of the equivalence point when titrating a strong acid with a strong base?
The equivalence point in titrating a strong acid with a strong base is significant because it marks the point at which the moles of acid and base are equal, resulting in a neutral solution. This is important for determining the concentration of the acid or base being titrated.
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How can the concentration of a substance be determined alkalimetrically?
The concentration of a substance can be determined alkalimetrically by titrating it with a known concentration of a base (alkali) until the equivalence point is reached. The volume of the base required to reach the equivalence point is used to calculate the concentration of the substance.
Why phenolphthalein cannot be used as an indicator for titrating a weak base against a strong acid?
Phenolphthalein is not suitable for this titration because its color change occurs over a pH range that is beyond the equivalence point of the weak base and strong acid titration. At the equivalence point of this titration, the solution is acidic, which is below phenolphthalein's color change pH range. This can lead to inaccurate results and difficulty in determining the endpoint of the titration.
Do all titrations of a strong base with a strong acid result in the same pH at the equivalence point?
Yes, all titrations of a strong base with a strong acid result in the same pH at the equivalence point, which is around 7.
How would the pH of the equivalence point for standard solution titration differ from a strong acid-strong base titration?
The pH at the equivalence point of a strong acid-strong base titration would be 7, as the solution is neutralized. In contrast, the pH at the equivalence point for a standard solution titration would depend on the nature of the reaction and the strengths of the acids and bases involved.
What is the significance of molar mass at the equivalence point in a titration experiment?
The significance of molar mass at the equivalence point in a titration experiment is that it helps determine the amount of substance being titrated. At the equivalence point, the moles of the titrant added are equal to the moles of the substance being titrated. Knowing the molar mass allows for the calculation of the substance's concentration or purity.
Standardising HCl using Na2CO3 titration. textbook says the solution at the equivalence point is slightly acidic. is it and why?
it depends on the strength of the acid and base used: so, strong acid + strong base = neutral equivalence point strong acid + weak base = acidic equivalence point weak acid + strong base = basic equivalence point In this case, HCl is a strong acid, and Na2CO3 a weak base. Therefore, the equivalence point will be slightly acidic.
How can the concentration of a substance be determined alkalimetrically?
The concentration of a substance can be determined alkalimetrically by titrating it with a known concentration of a base (alkali) until the equivalence point is reached. The volume of the base required to reach the equivalence point is used to calculate the concentration of the substance.
Why phenolphthalein cannot be used as an indicator for titrating a weak base against a strong acid?
Phenolphthalein is not suitable for this titration because its color change occurs over a pH range that is beyond the equivalence point of the weak base and strong acid titration. At the equivalence point of this titration, the solution is acidic, which is below phenolphthalein's color change pH range. This can lead to inaccurate results and difficulty in determining the endpoint of the titration.
Do all titrations of a strong base with a strong acid result in the same pH at the equivalence point?
Yes, all titrations of a strong base with a strong acid result in the same pH at the equivalence point, which is around 7.
How would the pH of the equivalence point for standard solution titration differ from a strong acid-strong base titration?
The pH at the equivalence point of a strong acid-strong base titration would be 7, as the solution is neutralized. In contrast, the pH at the equivalence point for a standard solution titration would depend on the nature of the reaction and the strengths of the acids and bases involved.
What is the significance of molar mass at the equivalence point in a titration experiment?
The significance of molar mass at the equivalence point in a titration experiment is that it helps determine the amount of substance being titrated. At the equivalence point, the moles of the titrant added are equal to the moles of the substance being titrated. Knowing the molar mass allows for the calculation of the substance's concentration or purity.
What factors influence the pH at the equivalence point in a strong-strong titration?
The factors that influence the pH at the equivalence point in a strong-strong titration are the strength of the acid and base being titrated, the concentration of the acid and base, and the volume of the acid and base used in the titration.
What is the pH at the equivalence point of a strong acid-strong base titration?
The pH at the equivalence point of a strong acid-strong base titration is 7, which is considered neutral because the strong acid (e.g., HCl) and strong base (e.g., NaOH) react completely to form water and a salt.
What is the significance of the half equivalence point in a titration process?
The half equivalence point in a titration process is significant because it indicates when half of the analyte has reacted with the titrant. At this point, the concentration of the analyte is equal to the concentration of the titrant, providing valuable information about the stoichiometry of the reaction and helping determine the equivalence point.
Which indicator is used in titration for strong acid?
For the titration of a strong acid, the indicator typically used is phenolphthalein. Phenolphthalein changes color in the pH range of 8.2 to 10, which is suitable for titrating a strong acid with a strong base to determine the equivalence point.
Why isn't the pH at the equivalence point always equal to 7 in a neutralization titration?
The pH at the equivalence point may not always be 7 in a neutralization titration because the nature of the acid and base being titrated can affect the pH. For example, if a strong acid is titrated with a weak base, the equivalence point may be acidic (pH < 7) due to the excess of the strong acid present. Conversely, if a strong base is titrated with a weak acid, the equivalence point may be basic (pH > 7) due to the excess of the strong base.
What will be the pH at the equivalence point of the titration in question 3?
For strong acid/strong base reactions: pH 7 is the equivalence point For titration of a weak base with strong acid : pH 6-3 is the equivalence point For titration of a weak acid with strong base : pH 8-11 is the equivalence point For weak acid/weak base reactions it is also around pH 7, but it happens so NON-sharply, vague, that titrations can't be used for these.
