Confidence Report: I am confident that our data in the experiment was “good data”. We had the expected positive results occur from the identification experiments. We made sure to measure everything correctly. We correctly identified the precipitate by performing the acid and base test on our precipitate. We received a positive result for each test performed for the presence of the zinc hydroxide compound. It was interesting to note the appearance of the zinc hydroxide from only the mixture of zinc, iodine and denizen water.
To me, it did not look as expected. It was a little more “Wet” than other precipitates we have worked with and even had to be separated with the centrifuge. We also found ourselves needing to pipette the excess water moisture room our precipitate because it was difficult to decant without also losing the precipitate. Perhaps the “wetness” could have been attributed to the fact that we did not place this precipitate over the Bunsen burner. Even though our precipitate seemed to contain moisture, it was positively Zen(OH)2.
I am confident that our tests were performed correctly and our results were as described in the lab manual. Our Results: The results showed that Zen(OH)2 was what was produced in the experiment. The acid and base tests for Zen(OH)2 showed positive results because zinc hydroxide is an empathetic oxide and can act as either an acid or a base in a reaction by either losing or gaining a proton. Tests for Acetic Acid Testable of 0. MM added to precipitate.
I + positive respectability dissolved in the acetic acid I Sodium Hydroxide Testes I + positive results colorless and clear solution was formed I Post Lab Questions: 1 . The chemical equation of the formation of zinc hydroxide after zinc and iodine react: CNN+12+Shannon(OH)2+12 2. When zinc hydroxide and acetic acid are reacted, the zinc hydroxide dissolves and a clear liquid is formed which contains zinc acetate and water. Because zinc hydroxide is empathetic, it can either give or receive a proton. When zinc hydroxide reacts with acetic acid, the reaction yields zinc acetate and water.
The reaction is as follows: + schnozzle(CHOC) 2 + OH 3. What is a side reaction? A side reaction is an unwanted chemical reaction that diminishes the yield of the desired product. 4. Acetic acid was used in the synthesis of zinc iodide because addition of a weak acid prevents the formation of Zen(OH)2 that occurs when zinc and iodine react with denizen water. The formation of the precipitate inhibits the production of the product Zinc and may make it seem as if the Asia law of conservation of mass was not obeyed.
Since acetic acid and water are both volatile, they can both be easily removed from the solution by heating which would possibly leave behind more Zinc . When the acid is not added, it is interesting to observe the Zen(OH)2 precipitate that is formed. A New Inquiry: What if we had heated this precipitate too like in the last experiment to remove all H2O from it? Would the heating have produced different results or would they remain the same since no acetic acid was present? Works cited: definition for “side reaction” found on Wisped, http://en. Wisped. Org/wick/chemical_synthesis.