No of equivalent of

**A**reacted = No of equivalent of**B**reacted = No of equivalent of**C**formed = No of equivalent of**D**formed**RELATION BETWEEN NORMALITY (N) AND MOLARITY (M):**

**SOME COMMON OXIDISING AGENT:**

**SOME COMMON REDUCING AGENT:**

**ILLUSTRATIVE EXAMPLE (1):**Calculate the moles of KMnO

_{4}required to reacting with 180 gm of Oxalic acid (H

_{2}C

_{2}O

_{4}). Also calculate the volume of CO2 at STP produce in the reaction? (K=39, Mn=55, Of=16)

**SOLUTION:**

**ILLUSTRATIVE EXAMPLE (2):**Calculate the weight of K

_{2}Cr

_{2}O

_{7}which reacts with KI to liberate 254 gm of I

_{2}?.(Cr=51.9961, I=127)

**SOLUTION:**

**ILLUSTRATIVE EXAMPLE (3):**Calculate volume of 0.05 M KMnO

_{4}required to react with 50 ml of 0.1M H

_{2}S in acidic medium , given H

_{2}S oxidized to SO

_{2}?.

**SOLUTION:**

**ILLUSTRATIVE EXAMPLE (4**

**):**Calculate the mass of Fe

_{3}O

_{4}required to react completely with 25 ml of 0.3 M K

_{2}Cr

_{2}O

_{7}?.

**SOLUTION:**

**ILLUSTRATIVE EXAMPLE (5):**Calculate the concentration of H

_{2}O

_{2}if 20 ml H

_{2}O

_{2}Solution react with 10 ml of 2M KMnO

_{4}in acidic medium ?

**SOLUTION:**

**ILLUSTRATIVE EXAMPLE (6):**Calculate the moles of KCl which required to produce 10 ml of Cl

_{2}when reacted with KClO

_{3}?

**SOLUTION:**

**ILLUSTRATIVE EXAMPLE (7):**Calculate the moles of KMnO

_{4}required for Oxidation of 1.25 moles Cu

_{2}S.

**SOLUTION:**

**ILLUSTRATIVE EXAMPLE (8):**Calculate the Molarity of H

_{2}O

_{2}if 11.2 ml H

_{2}O

_{2}require 30 ml of 0.5 M K

_{2}Cr

_{2}O

_{7}for its Oxidation . also calculate the volume of strength of H

_{2}O

_{2}.

**SOLUTION:**

**ILLUSTRATIVE EXAMPLE (9**

**):**696 gm of Fe

_{2}O

_{3}and FeO reacts completely with 158 gm of KMnO

_{4}in acidic medium . Calculate the composition of mixture.

**SOLUTION:**

**ILLUSTRATIVE EXAMPLE (10):**829 gm of K

_{2}Cr2O

_{7}and H

_{2}C

_{2}O

_{4}reacts completely with 7/3 moles of K

_{2}Cr

_{2}O

_{7}.

(1) Calculate the moles of each in mixture.

(2) Calculate the moles of NaOH required to react with above mixture.

**SOLUTION:**

**ILLUSTRATIVE EXAMPLE (11):**50ml of KMnO

_{4}is mixed with excess of KI the I

_{2}liberated require 30 ml of 0.1M Na

_{2}S

_{2}O

_{3}solution calculate the Molarity of KMnO

_{4}solution.

**SOLUTION:**

**ILLUSTRATIVE EXAMPLE (12):**50 Cm

^{3}of 0.04 M K

_{2}Cr

_{2}O

_{7}in acidic medium oxidized a sample of H

_{2}S gas to Sulphur . The volume of 0.03 M KMnO

_{4}required to Oxidize the same amount of H

_{2}S gas to Sulphur, in acidic medium is.

**SOLUTION:**

**ILLUSTRATIVE EXAMPLE (13):**What volume of 0.4 M Na

_{2}S

_{2}O

_{3}would be required to react with the I

_{2}liberated by adding excess of KI to 50 ml of 0.2 M CuSO

_{4}? (Ans= 25 ml).

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