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During the titration of a weak base with...

During the titration of a weak base with a strong acid, one should use an acid-base indicator that changes colour in the :

A

acid range

B

basic range

C

buffer range

D

neutral range

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The correct Answer is:
A
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Acid base titration

The solution of a weak acid and a strong base is alkaline.

Statement: In an acid-basic titration involving a strong base and a weak acid, methyl orange can be used as an indicator. Explanation: Methyl orange changes its colour in the pH range 3 to 5.

The following curve shows the change of pH during the course of titration of weak acid HA with a strong base. At which point in the titration curve is the concentration of acid equal to that of its conjugate base.

Consider the following statements: (a) Both acids and bases change colour of all indicators. (b) If an indicator gives a colour change with an acid, it does not give a change with a base. (c) If an indicator changes colour with a base, it does not change colour with an acid. (d) Change of colour in an acid and a base depends on the type of the indicator. Which of these statements are correct?

Assertion : In an acid-base tiration involving strong base and a weak acid, methyl organe can be used as an indicator. Reason : Methyl orange changes it colour in pH range of 7 to 9.

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