Can we use indicators for a titration between weak acid and weak base explain?

For the titration between a weak acid and a weak base, there is no sharp change of pH at the equivalence point. The pH changes gradually over a range of pH values. Thus, no indicator is suitable for this type of titration.

What indicator should you use for a weak base?

Substances such as phenolphthalein, which can be used to determine the pH of a solution, are called acid-base indicators. Acid-base indicators are either weak organic acids or weak organic bases. The anion of methyl orange, In−, is yellow, and the nonionized form, HIn, is red.

Which of the following indicators is best suited in the titration of a weak base versus a strong acid?

In the titration of strong acid and weak base, the indicator used is Methyl Orange. Note: Phenolphthalein is used as an indicator for Strong acid -strong base titration.

Why is an indicator a weak acid?

Acid – Base indicators (also known as pH indicators) are substances which change colour with pH. They are usually weak acids or bases, which when dissolved in water dissociate slightly and form ions. At low pH values the concentration of H3O+ is high and so the equilibrium position lies to the left.

What indicator is best for titration?

phenolphthalein
The indicator phenolphthalein, whose range spans from pH 8 to 10, therefore makes a good choice for this type of titration. If you don’t know the pH change around the equivalence point of your titration, consult a general chemistry textbook.

Which indicator is suitable for strong acid and strong base?

phenolphthalein indicator
A strong acid- strong base titration is performed using a phenolphthalein indicator. Phenolphtalein is chosen because it changes color in a pH range between 8.3 – 10. It will appear pink in basic solutions and clear in acidic solutions.

Why are indicators weak acids and bases?

Which indicator is best for strong acid and strong base?

A strong acid-strong base titration is performed using a phenolphthalein indicator. Phenolphtalein is chosen because it changes color in a pH range between 8.3 – 10.

Which of the following indicator is suitable for titration of strong acid with weak base consider vertical line in the titration graph is from 4 to 6?

In the acid-base titration involving strong base and weak acid, methyl red can be used as an indicator.

What is an acid-base indicator?

An acid-base indicator is a weak acid or a weak base. The undissociated form of the indicator is a different color than the iogenic form of the indicator. An Indicator does not change color from pure acid to pure alkaline at specific hydrogen ion concentration, but rather, color change occurs over a range of hydrogen ion concentrations.

What is the best indicator for weak acid titration?

Indicators for Weak Acid – Strong Base Titrations. A suitable indicator for the titration of the weak acid CH 3 COOH(aq) and the strong base NaOH(aq) would be either thymol blue (pH range 8.0 – 9.6) or phenolphthalein (pH range 8.3 – 10.0).

What is the difference between iogenic and acid base indicators?

Acid-Base Indicators. The undissociated form of the indicator is a different color than the iogenic form of the indicator. An Indicator does not change color from pure acid to pure alkaline at specific hydrogen ion concentration, but rather, color change occurs over a range of hydrogen ion concentrations.

How do you titrate for weak bases?

Weak bases should be titrated in the presence of indicators which change under slightly acidic conditions. Several acid-base indicators are listed below, some more than once if they can be used over multiple pH ranges. The quantity of indicator in aqueous (aq.) or alcohol (alc.) solution is specified.