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There are three acid-base indicators. Me...

There are three acid-base indicators. Methyl orange (end point at `pH=4`), bromothymol blue (end point at `pH-7`), phenolphthalein (end point at `pH=9`). Which is the most suitable indicator for the following titrations?
(a). `H_2SO_4` with KOH
(b). KCn with HCl
(c). `NH_3` with `HNO_3`
(d). HF with NaOH

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To determine the most suitable acid-base indicators for the given titrations, we need to analyze the nature of the acids and bases involved in each case. The indicators we have are: 1. **Methyl Orange**: pH endpoint at 4 (suitable for strong acids) 2. **Bromothymol Blue**: pH endpoint at 7 (suitable for neutral solutions) 3. **Phenolphthalein**: pH endpoint at 9 (suitable for strong bases) Now, let's analyze each titration step by step: ...
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A weak base MOH was titrated against a strong acid. The pH at 1/4 th equivalence point was 9.3. What will be the pH at 3/4 th equivalence point in the same titration? (log3=0.48)

In acid-base titration react rapidly to neutralise each other. Equivalence point is a point at which the acid and the base (or oxidising agent and reducing agent) have beem added in equivalent quantities. The end point in the point at which the titration stops. since the purpose of the indicator is to stop the titration close to the point at which the acid and base were added in equivalent quantities, it is important that the equivalent point and the end point be as close as must change colour at a pH close to that of a solution of the salt of the acid base. Singificantly, the pH changes most rapidly near the equivalent point. The exact shape of a titration curve depends on K_(a) and K_(b) of acid and base. The pH at equivalence point is

In acid-base titration react rapidly to neutralise each other. Equivalence point is a point at which the acid and the base (or oxidising agent and reducing agent) have beem added in equivalent quantities. The end point in the point at which the titration stops. since the purpose of the indicator is to stop the titration close to the point at which the acid and base were added in equivalent quantities, it is important that the equivalent point and the end point be as close as must change colour at a pH close to that of a solution of the salt of the acid base. Singificantly, the pH changes most rapidly near the equivalent point. The exact shape of a titration curve depends on K_(a) and K_(b) of acid and base. The curve represents the titration of

In acid-base titration react rapidly to neutralise each other. Equivalence point is a point at which the acid and the base (or oxidising agent and reducing agent) have beem added in equivalent quantities. The end point in the point at which the titration stops. since the purpose of the indicator is to stop the titration close to the point at which the acid and base were added in equivalent quantities, it is important that the equivalent point and the end point be as close as must change colour at a pH close to that of a solution of the salt of the acid base. Singificantly, the pH changes most rapidly near the equivalent point. The exact shape of a titration curve depends on K_(a) and K_(b) of acid and base. The following curve represents titration curve of HCI against KOH . The pH at equivalent point is Examine the titration curve below and answer the question.

Acid-base indicator such as methy 1 orange, phenolphthalein, and bromothymol blue ate substances which change colour accroding to the hydrogen ion concentration of the solution to which they are added. Most indicators are weak acids (or more rarely weak base) in which the undissociated and dissociated forms have different and distinct colours. If methy 1 orange is used as the examples and the un-dissociated forms is written as HMO , then dissociation occurs as shown below: Reaction: {:(HMOhArr,H^(o+)+,MO^(Theta),,),(Red,"Colourless","Yellow",,):} The indicator should have a sharp colour change with the equivalence point of the titration. Usually the colour change of the indicator occurs over a range of about two pH units. It should be noted that the eye cannot detect the exact end point of the tiytration. The pK_(a) of the indicator should be near the pH of the solution at the equivalance point. Which of the following sitution exists at the equivalence point of titration?

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