Acid base and redox titration of vitamin C Lab Report

Acid base and redox titration of vitamin C - Lab Report Example 1:1 Moles of vitamin C 0.0031938mol Mass of vitamin C 0.564g Percent of vitamin C in the tablet 85.5% Table 2:The table below summarizes the results if the redox reaction experiment Data Trial Mass tablet used 0.67g Molarity of I3- (moles/L) 0.0990mol/l Initial volume of I3- (mL) 4.1 mL Final volume of I3- (mL) 28.6 mL Volume of I3- used 24.5 ml Moles of I3- used 0.0024mol Vitamin C: base molar ratio 1:1 Moles of vitamin C 0.0024mol Mass of vitamin C 0.43 g Percent of vitamin C in the tablet 64.18 % The equations used to find the answers in the trials are written bellow, Equation for table 1 C6H8O6(aq) + NaOH(aq) -> H2O(l) + Na+(aq) + C6H7O6-(aq) Equation for table 2 C6H8O6(aq) + I3-(aq) -> 3 I-(aq) +C6H6O6(aq) + 2H+(aq) Discussion/Conclusion:Chemical properties of substances initiate reactions. The reduction property of vitamin C, for example, is responsible for the chemical’s property to initiate reactions with other chemicals. The acid has a high tendency to donate electron s to other chemicals forming a basis for reactions. Based on stoichiometry and known information of a chemical in reaction with vitamin C, elements such as the number of moles and even mass of vitamin C can be determined from a reaction that can be either an acid base reaction or a redox reaction. The acid base reaction involved sodium hydroxide solution, the base in the reaction, and vitamin C, the acid. The equation for the reaction is given as follows C6H8O6(aq) + NaOH(aq) -> H2O(l) + Na+(aq) + C6H7O6-(aq) Vitamin C was oxidized in the process while sodium hydroxide was reduced. The redox reaction is on the other hand represented by the following equation, C6H8O6(aq) + I3-(aq) -> 3 I-(aq) +C6H6O6(aq) + 2H+(aq) The oxidation reaction is given by the following equation C6H8O6(aq)->C6H6O6(aq)+... Chemical properties of substances initiate reactions. The reduction property of vitamin C, for example, is responsible for the chemical’s property to initiate reactions with other chemicals. The acid has a high tendency to donate electrons to other chemicals forming a basis for reactions. Based on stoichiometry and known information of a chemical in reaction with vitamin C, elements such as the number of moles and even mass of vitamin C can be determined from a reaction that can be either an acid base reaction or a redox reaction. The acid base reaction involved sodium hydroxide solution, the base in the reaction, and vitamin C, the acid. The equation for the reaction is given as follows C6H8O6(aq) + NaOH(aq) -> H2O(l) + Na+(aq) + C6H7O6-(aq) Vitamin C was oxidized in the process while sodium hydroxide was reduced. The redox reaction is on the other hand represented by the following equation, C6H8O6(aq) + I3-(aq) -> 3 I-(aq) +C6H6O6(aq) + 2H+(aq) The oxidation reaction is given by the following equation C6H8O6(aq)->C6H6O6(aq)+ 2H+(aq) The reduction equation is given by I3-(aq) -> 3 I-(aq) From the chemical equation, vitamin C is oxidized while iodine ions are reduced. The accurate titration is the acid base reaction. This is because it offers the same percentage composition as indicated on the vitamin C tablet used. The experiments offered different results. While the redox reaction yielded a percentage composition of 64.19 percent, the acid base reaction yielded 85.5 percent. The difference in the numbers could be due to a number of errors. The first type of error that could have led to the difference is inaccurate measurement of the reactants. Such could occur in measuring readings in the titration process for the redox reactions.

Auguste Comte Research Paper Example | Topics and Well Written Essays - 1750 words

Auguste Comte - Research Paper Example Comte’s success in defining sociology from an all-embracive or universal perceptive provokes the frontiers of other branches of knowledge to accept it and utilize in various purposes. Due to these harmonious relations of sociology with other sciences, scholars were inspired to consider it as science and they began to consider human being as well as his society and culture as a subject matter of this branch of knowledge. According to Comte, the preamble of sociology is considered to be embedded in his Positive Philosophy, that is, Positivism. After theoretically reviewing all the origins of all sciences he comes to a conclusion that human knowledge about has gone along three different stages: theological, metaphysical and scientific. The later, according to Comte, is Positivism. Therefore it is evident that Comte’s Positivism involves the scientific exploration of human society and thus â€Å"sociology† emerges as a branch of human knowledge. In fact, the polysemu s connotation of the scientific exploration of society provokes him to use the term â€Å"positivism†. At the theological phase, the knowledge of society basically comes from how religion and religious beliefs tend to define it. This theological view is based on the dogmatic doctrine of religion that is devoid of any opposition unless another religious view comes up with a set of totally different dogmas. It defines man and society as the implementation of the will of God and the social rules and regulations are referenced to God. This view, in the first place, circumcises the scope of experimenting the validity of the religious doctrines of society under the blasphemous taboo. So according to Comte, it goes exclusively goes against the zeal of science. But the Enlightenment in Europe in the 19th Century challenged this superiority of religion to shape human and to determine the position of human