Which of the following statements is incorrec | vedclass

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(A) Indicator$pH$ rangeMethyl orange$3.2-4.5$Phenolphthalein$8.3-10.5$Indicators are chosen based on the $pH$ range of the equivalence point of the ti

Vedclass · Accepted Answer

Methyl orange may be used for a weak acid vs. weak base titration.

Vedclass · Answer

(A) Indicator$pH$ rangeMethyl orange$3.2-4.5$Phenolphthalein$8.3-10.5$Indicators are chosen based on the $pH$ range of the equivalence point of the titration.$1$. Methyl orange is suitable for titrations where the equivalence point falls in the acidic range $(pH \approx 3-5)$,such as strong acid vs. weak base.$2$. Phenolphthalein is suitable for titrations where the equivalence point falls in the basic range $(pH \approx 8-10)$,such as weak acid vs. strong base.$3$. Both indicators can be used for strong acid vs. strong base titrations because the $pH$ change at the equivalence point is very sharp $(pH \approx 4-10)$.$4$. For weak acid vs. weak base titrations,there is no sharp change in $pH$ at the equivalence point,so no simple indicator is suitable. Therefore,the statement that Methyl orange may be used for a weak acid vs. weak base titration is incorrect.

Which of the following statements is incorrect regarding the use of indicators in acid-base titration?

Similar Questions

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

If we use phenolphthalein as an indicator in a titration of $Na_2CO_3$ with $HCl$,the usual result is:

$A$ compound '$X$' is a weak acid and it exhibits colour change at $pH$ close to the equivalence point during neutralization of $NaOH$ with $CH_3COOH$. Compound '$X$' exists in ionized form in basic medium. The compound '$X$' is.

Which indicator is used for the titration of $CH_3COOH$ and $NaOH$?

Phenolphthalein is not a good indicator for titrating :-

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