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 =……………………..
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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