Internal Examination Essay

Narki SACKEY IB1B

Topic: Acid-Base Titration

Aims:

1 ) To use methyl orange and phenolphthalein as indicators to determine accurately the end of an acid-base titration. installment payments on your To present titration data appropriately.

Findings:

Table of Results Demonstrating The Amount Of 0. 12 Mol/dm3 Hydrochloric Acidity Required to Neutralise 25cm3 Of Sodium Carbonate of an not known Concentration Applying Methyl Orange colored Indicator. Pipette Solution| Salt Carbonate| Mol/dm3

Burette Solution| Hydrochloric Acid| 0. 12Mol/dm3

Indicator| Methyl Orange|

| | Trial 1| Trial 2| Trial three or more

Burette readings| Final/cm3 В± 0. 05 | 14. 80| 14. 50| 13. 60| | Initial/cm3 В±0. 05| 0. 00| 0. 00| zero. 00

Amount Used (titre)/cm3В±0. 10 | | 16. 80| 14. 50| 16. 60| Imply Titre/cm3 В±0. 05| | 14. 63

2. The sodium chloride and hydrochloric chemical p solutions were both colourless at the start from the experiment. * When methyl orange was added to the sodium chloride, it turned orange. 2. As the hydrochloric acid solution was added to the solution in the conical flask, its shade began to change to pink. 2. When the remedy was swirled, it became lemon again. At the end point, the perfect solution is turned from orange to pink. Computations

2HCl & Na2CO3 -> 2NaCl & CO2 + H2O

Consequently , mole ratio of Hydrochloric Acid to Sodium Carbonate is two: 1 Percentage uncertainty of volume of HCl = 0. 10/14. 63 * 75

= zero. 68% Percentage uncertainty of volume of Na2CO3 = zero. 06/25 2. 100

=0. 24%

Volume of moles of sodium carbonate = 1

Number of skin moles of Hydrochloric acid a couple of

Therefore , skin moles of salt carbonate = 0. five *0. doze

= 0. 6Mols Attentiveness of Na2CO3 = Skin moles of sodium carbonate

Volume of Sodium Carbonate...



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