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(D) In the titration of a weak acid and a strong base,the $pH$ at the equivalence point is greater than $7$ (typically between $8$ and $10$).Phenolpht

Vedclass · Accepted Answer

Phenolphthalein ($8.2$ to $10$)

Vedclass · Answer

(D) In the titration of a weak acid and a strong base,the $pH$ at the equivalence point is greater than $7$ (typically between $8$ and $10$).Phenolphthalein is the most suitable indicator because its $pH$ range ($8.2$ to $10$) coincides with the $pH$ change at the equivalence point of this titration.Methyl orange and Methyl red are suitable for strong acid-strong base or strong acid-weak base titrations,as their $pH$ ranges are in the acidic region.

The best indicator for the detection of the end point in the titration of a weak acid and a strong base is:

Similar Questions

The pink colour of phenolphthalein in an alkaline medium is due to -

$50 \ mL$ of $0.1 \ M$ of a weak acid $HA$ is titrated with $0.1 \ M$ of $NaOH$. The ionization constant of $HA$ $(K_a)$ is $1.8 \times 10^{-5}$. Using the given information and from the options shown below,the best indicator for the titration of $HA$ with $NaOH$ is $....$

Which indicator can be used in the titration of a strong acid and a strong base?

Phenolphthalein is not a good indicator for titrating :-

If a very small amount of $HPh$ (phenolphthalein) is added to a $0.1 \ M$ aqueous solution of $CH_3COONa$,the fraction of the indicator that exists in the colourless form is:
$[K_b(CH_3COO^{-}) = 10^{-9}, pK_a(HPh) = 9.6, \log 2 = 0.3]$

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