Chem lab module 7 Essay Example | Topics and Well Written Essays - 750 words

Chem lab module 7 - Essay ExampleThe declaration and the solid were separated by decantation.I divided the remaining solid available to perform vinegar. Since no bubbles were seen, the possible compounds were narrowed bring down to Plaster of Paris and cream of tartar. On addition of hydrochloric acid, the precipitous didnt dissolve, thereby, validating the solid precipitate to be Plaster of Paris.Moving to the answer part, a violet color was obtained on carrying out the pH outpouring, which narrowed down the compounds to table salt, glucose and sucrose. On copper sulphate test, no reddish brown precipitate was find hence presence of glucose was not possible. The exclusively other sugar that could be present other was sucrose.I took 2g of the given unknown salmagundi in a test electron tube and added water. After decanting the solution from the solid, I carried out the identification tests separately on the solid and the solution parts.I, first, carried out the iodine test on the solid precipitate and got a negative result. Next I performed the vinegar test and observed bubbles rise from the test tube, hence confirming the presence of baking soda.In the remaining solid part, which I had previously separated into another test tube, I added hydrochloric acid. Since the precipitate didnt dissolve, the other constituent of the mixture was identified as Plaster of Paris.I added 2g of mixture 2 in a test tube followed by 10 ml of water. After separating the solution from the solid, I performed the pH test on the solution and obtained green color. To distinguish between the possible presence of drain opener and washing soda, I added vinegar, after(prenominal) taking 2ml of the solution in another clean test tube. Bubbles were seen to rise in the tube, hence confirming the presence of drain opener.In the solid part, I performed the iodine test, followed by vinegar test only to be met by a negative result. The possible compounds were narrowed