1.2g of a monoprotic acid HA,is titrated with 0.222 M NaOH solution. The pH of the analyte solution is tiration curve is shown in the diagram. The different indicators used in this titratation and their pK_(a) values are as follows : Methyl Red (pK_(a) = 5.8) , Neutral Red (pK_(a) = 7.2), Cresol Purple (pK_(a) = 8.6) Choose the correct statement from the following

1.2g of a monoprotic acid HA,is titrated with 0.222 M NaOH solution. T

1.	1.2g of a monoprotic acid HA,is titrated with 0.222 M NaOH solution. The pH of the analyte solution is tiration curve is shown in the diagram. The different indicators used in this titratation and their pK_(a) values are as follows : Methyl Red (pK_(a) = 5.8) , Neutral Red (pK_(a) = 7.2), Cresol Purple (pK_(a) = 8.6) Choose the correct statement from the following
Answer» In the titration using METHYL red a premature end pointis OBTAINED and the CALCULATED molar mass of HA is found to be greater than the actual value. In the titration using methyl red a premature end pointis obtained and the calculated molar mass of HA is found to be SMALLER than the actual value. In the titration using cresol purple end POINT is crossed and the calculated molar mass of HA is found to be smaller than the actual value. In the titration using cresol purple the correct choice of indicator for this titration is neutral red. Solution :N//A