Which of the following is the required property of an acid/base indicator?Question 4Answera.The protonated and the deprotonated forms of the indicator are different colours.b.It has a low molecular weight.c.It reacts violently with water.d.The protonated and the deprotonated forms of indicator are the same colour.
Question
Which of the following is the required property of an acid/base indicator?Question 4Answera.The protonated and the deprotonated forms of the indicator are different colours.b.It has a low molecular weight.c.It reacts violently with water.d.The protonated and the deprotonated forms of indicator are the same colour.
Solution
The correct answer is a. The protonated and the deprotonated forms of the indicator are different colours.
This is because an acid/base indicator works by changing its color depending on the pH of the solution it is in. This change in color is due to the protonation or deprotonation of the indicator. In an acidic solution, the indicator is protonated and it shows one color. In a basic solution, the indicator is deprotonated and it shows a different color. Therefore, for an indicator to function properly
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