EXPERIMENT: DETERMINATION OF THE AMOUNT OF POTASSIUM HYDROXIDE IN THE GIVEN SOLUTION   Aim: To determine the amount of Potassium Hydroxide in the given solution. Materials: 0.1N, 100 ml Sodium carbonate solution Sodium carbonate (Na2CO3), hydrochloric acid (HCl), Potassium hydroxide(KOH), phenolphthalein indicator, methyl orange indicator, pipette, burette, conical flask, Measure cylinder (10 ml ), Volumetric flask(100) ml), Weighting machine balance. Theoretical Background: ……………………   Observations: Standardization of HCl Sl. No Volume    of sodium carbonate (V1) Initial burette reading Final burette reading Volume of HCl used 1 10 0.0 9.9 9.9 2 10 9.9 19.9 10.0 3 10 19.9 29.9 10.0   Concordant value (V2) = 10 ml Estimation of KOH Sl. No Volume   of KOH (V4) Initial burette reading Final burette reading Volume   of HCl used 1 10 0.0 8.1 8.1 2 10 8.1 16.1 8 3 10 16.1 24.1 8     Concordant value (V3) = 8 ml Calculations: Normality of Na2CO3 solution (N1) = 0.1 N Mass of Na2CO3 = ….. Standardization of HCl: N1V1 (Na2CO3) = N2 V2 (HCl) Normality of HCl, N2 =………………… *N3V3 (HCl) = N4V4 (Unknown KOH) [* N3 = N2 because same HCl is being used in both titration] Normality of KOH, N4 =…………………… Amount of KOH in g /L = N4 * Equivalent weight of KOH =……………………..

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EXPERIMENT: DETERMINATION OF THE AMOUNT OF POTASSIUM HYDROXIDE IN THE GIVEN SOLUTION

 

Aim: To determine the amount of Potassium Hydroxide in the given solution.

Materials: 0.1N, 100 ml Sodium carbonate solution Sodium carbonate (Na2CO3), hydrochloric acid (HCl), Potassium hydroxide(KOH), phenolphthalein indicator, methyl orange indicator, pipette, burette, conical flask, Measure cylinder (10 ml ), Volumetric flask(100) ml), Weighting machine balance.

Theoretical Background: ……………………

 

Observations:

Standardization of HCl

Sl. No

Volume    of sodium carbonate (V1)

Initial burette reading

Final burette reading

Volume of

HCl used

1

10

0.0

9.9

9.9

2

10

9.9

19.9

10.0

3

10

19.9

29.9

10.0

 

Concordant value (V2) = 10 ml

Estimation of KOH

Sl. No

Volume   of

KOH (V4)

Initial burette reading

Final burette reading

Volume   of

HCl used

1

10

0.0

8.1

8.1

2

10

8.1

16.1

8

3

10

16.1

24.1

8

 

 

Concordant value (V3) = 8 ml

Calculations:

Normality of Na2CO3 solution (N1) = 0.1 N

Mass of Na2CO3 = …..

Standardization of HCl:

N1V1 (Na2CO3) = N2 V2 (HCl)

Normality of HCl, N2 =…………………

*N3V3 (HCl) = N4V4 (Unknown KOH) [* N3 = N2 because same HCl is being used in both titration]

Normality of KOH, N4 =……………………

Amount of KOH in g /L = N4 * Equivalent weight of KOH =……………………..

Result discussion: ………………

Precautions:

References: ………

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