At half - equivalence point in the titration of weak acid by a strong base , pH = `…………..`

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

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

Which of the following pH curve represent the titration of weak acid and strong base (dotted line show equivalence point)?

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.

Statement-1:Phenolphathalein can be used as indicator in the titration of weak acid with NaOH. Statement-2 :Near the end point in the titration of weak acid with NaOH, the pH of the solutions is alkaline due to hydrolysis of anion.

(a). IF both (A) and (R) are correct and (R) is the correct explanation of (A). (b). If both (A) and (R) are correct but (R) is not the correct explanation of (A). (c). If (A) is correct, but (R) is incorrect. (d). If (A) is incorrect, but (R) is correct. ltbr. (e) if both (A) and (R) are incorrect. Q. Assertion (A): In the titration of strong acid and strong base, phenolphthalein is used as suitable indocator. Reason (R): IN the titration of strong acid and strong base, the equivalence points lies is the pH range of (3.0-10.5) and phenolphthalein have pH range of (8.0-9.8) .

If the equilibrium constant for the reaction of weak acid HA with strong base is 10^(9) , then pH of 0.1M Na A is:

Why the pH at the equivalence point of a titration may differ from 7 ?

Degree hydrolysis (h) of a salt of weak acid and a strong base is given by

Assertion(A) : The value of enthalpy of neutralization of a weak acid by strong base is numerically less than 57.1 kJ . Reason(R ) : All OH^(-) ions of strong base are not completely neutralized by H^(+) ions obtained from acid.