Correct The solution in the buret (in this case, H2SO4) is called the titrant. T
ID: 636894 • Letter: C
Question
Correct The solution in the buret (in this case, H2SO4) is called the titrant. The sample in the fask (in this case, KOH) is called the analyte. The stage in a titration when the exact volume of solution needed to complete the reaction has been added is called the stolchiometric point or equivalence point To detect the equivalence point, a few drops of an acid-base indicator are added to the analyte before the titration. Part B agents in solution For example, a solution of hydrogen peraxide HoOs, can be trated 4 The following 2KMno(a)H202(aq)+3H,So4(ag)+ peroxide was dissolved in 100 ml, of water and then trated with 1 68 MKMnO hat mass of El,O, was assolved the tration required 21.3 mL ot the KMnO4 solution? Express your answer with the appropriate units.Explanation / Answer
ans)
from above information that
Given :
Volume of water= 100.0 mL
1.68 M =[KMnO4]
Volume of KMnO4 required = 21.3 mL = 0.0213 L
Calculation of moles of KMnO4
n KMnO4 = volume in L x molarity
= 0.0213 L x 1.68 M
= 0.0358 mol
Mol ratio of H2O2 : KMnO4 is 1 : 2
Moles of H2O2 required
= n KMnO4 x 1 mol H2O2 / 2 mol KMnO4
= (0.0358 x 1 / 2 ) mol H2O2
= 0.0179 mol H2O2
Mass of H2O2 = mol x molar mass
= 0.0179 mol H2O2 x 34.0147 g /mol
=0.608 g
Mass of H2O2 = 0.608g approximately 0.61 g