Carbohydrate Lab Report Essay

Qualitative identification of a substance is of significant importance in chemistry. Physical constants such as thawing points have tradition each(prenominal)y been used by organic chemistry for identification of unvalued step ups. As for inorganic substances, the precipitation of a solid, ex tennerds of a flame test, or the ecesis of a colour ined substance could each(prenominal)(a) be keys to poseing a sample. Chromatography and spectra be amongst the newer techniques dependable today. A problem that arises in biochemistry when attempting to identify a particular compound is that the tests that be utilized to identify these compounds rely on the reaction of a functional throng and therefore will yield collateral reactions with more than just one compound. This performer that more than one test has to be performed in order to deduce which compound is present by process of elimination. lucre chemistry allows us a abundant opportunity to better understand qualitative t esting. The tests run within this experiment are usually carried out to identify elementary moolahs. It is possible that by running these tests with a variety of different carbohydrates we determine the individuation of an abstruse sample. renders benedicts foot raceTests for Reducing Sugar (+), Nonreducing Sugar () substantiating consequence Red precipitate shun lead No precipitate Bials TestTests for Pentoses (+), Other () commanding solving Change in color to muddy dark obscure Negative depart non cloudy dark blue Barfoerds TestTests for Monosaccharides (+), Disaccharides ()Positive exit Red precipitate Negative result No precipitate Seliwanoffs TestTests for Fructose (+), Other ()Positive result Change in color to orange tree tree Negative result Not orange Glucose Oxidase TestTests for Glucose (+), Other ()Positive result Changes color Negative result clay same color Starch atomic number 53 TestTests for Starch (+), Sucrose ()Positive result Change in color to blue Negative result Not blueDiscussionWe determined our carbohydrate to be ribose considering it matched up perfectly with all the test results we had ran. Ribose was the only carbohydrate of the ten that had similar reactions to the tests performed. The three tests that ribose was subject to were Benedicts test, Bials test, and Barfoerds test, all of which ribose tested positive for. Since the unsung besides tested positive to these three tests and invalidating to all other tests that we ran, this means the unknown is a reducing sugar, a pentose, and a monosaccharide. We did have a bit of strike trying to decide whether the unknown was arabinose or ribose because they both tested positive to the aforementioned(prenominal) tests. However, arabinose had a greenish tint and our unknown matched in color more tight to riboses dark blue.Read more Iodine Test for Starch laboratory Report