Ib Chemistry Essay

Travis Diffenbaugh
Kelly Owens
Chemistry HL
Titration IA

Aim-
The aim was to find the amount of Vitamin C in orange juice, (ascorbic acid) through extraction procedure called titration Data collection;

Vitamin C
Initial amount of Vitamin C
Uncertainty ± 0.1 ml Trial 1 | Trial 2 | Trial 3 | 25 ml | 25 ml | 25 ml |

Iodine
Uncertainty ± 0.1 ml Trial 1 | Trial 2 | Trial 3 | 3.5 ml | 3.6 ml | 3.4 ml | Average: | 3.5 ml | |

Orange Juice
Initial amount
Uncertainty ± 0.1 ml Trial 4 | Trial 5 | Trial 6 | 25 ml | 25 ml | 25 ml |

Iodine added
Uncertainty ± 0.1 ml Trial 4 | Trial 5 | Trial 6 | 9.2 ml | 9.3 ml | 9.3 ml | Average: | 9.3 ml | | Data;

-Vitamin C in in a 450 ml Minute Maid orange juice:
.2 g of Vitamin C x g 3.5 ml of I2 9.3 ml

.05 g x g
25 ml 450 ml

.9 g x g
100 ml 180 ml Percent Error= 55%
Observations:

* I placed the Vitamin C under the burette and I measured how much iodine was in the flask, after I was finished it turned from dark green to dark blue. * The Vitamin C experienced more variations than orange juice * Vitamin C was a natural clear color * Orange juice turned black * The reactions didn’t see any change until equilibrium was reached and colors changed

Conclusion: When Iodine and vitamin C mix, there is no visible evidence until equilibrium is reached. Once it was reached it was obvious titration was occurring because of the orange juice changing colors to black. The amount of iodine solution is equal to the vitamin C when added to the orange juice. Some errors might have influenced the results although. Some limitations include the fact my solution had to be remade, as well as the fact the