Phenolphthalein indicator is used for the pH range:

3.2 - 4.4

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4.8 - 6.0

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6.8 - 8.4

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8.2 - 10.0

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Solution

The correct option is D $8.2 - 10.0$
Phenolphthalein is an acidic indicator which is used in the $p H$ range of $8.2 - 10$ .

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Similar questions

For phenolphthalein $p K_{i n}$ = 9.7. The indicator can be used for the pH range of 8.2 to 10. Calculate the $\frac{[I n^{-}]}{[H I n]}$ for the upper and lower limits of the range.

Indicator	pH range
Methyl violet	0.3-1.8
Methyl orange	2.8-3.8
Congo red	2.8-4.8
Methyl red	3.8-6.1
Bromothylmol blue	6.0-7.9
Phenol Red	6.8-8.6

The table above shows the pH ranges of some common indicators. Given that

K_{a}

7.3 \times 10^{- 10}

for boric acid

(H_{3} B O_{3})

, Choose an indicator that can be used for the titration of

0.10 M K H_{2} B O_{3}

with 0.10 M HCl.

Q. For a series of indicators, the colours and pH range over which colour change takes are as follows:

Indicator	Colour change over pH range
U	Yellow to blue pH 0.0 to 1.6
V	Red to yellow pH 2.8 to 4.1
W	Red to yellow pH 4.2 to 5.8
X	Yellow to blue pH 6.0 to 7.7
Y	Colourless to red pH 8.2 to 10.0

Which of the following statements is/are correct?

Q. Phenolphthalein is used to indicate the pH range between :

Q. Assertion :Phenolphthalein is used as indicator during the titration of oxalic acid against sodium hydroxide. Reason:

p H

range of phenolphthalein is from

8

9.6

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Phenolphthalein indicator is used for the pH range:

The correct option is D 8.2−10.0Phenolphthalein is an acidic indicator which is used in the pH range of 8.2−10.

The correct option is D $8.2 - 10.0$
Phenolphthalein is an acidic indicator which is used in the $p H$ range of $8.2 - 10$ .