Qualative Analysis Lab Report Example | Topics and Well Written Essays - 1250 words

Qualative Analysis - Lab Report ensampleAt the end of the practical it was possible to establish the cations present in our foreigner sample 19.qualitative analysis is a method in analytical chemistry which involves the identifying of unknowns in a devoted ancestor. It is valuable in chemistry especially when one is dealing with unknown mixtures to be able to establish the termination properties and the methods of separation if you need to separate. In the general Laboratory set up, qualitative analysis is aimed at acquiring a deeper understanding of the cations and also learns how to handle them and detect them effectively when in any solution.The main hypothetic question in qualitative analysis is whether a certain cation is present in a given solution. To prove that hypothesis null, then a series of chemical reactions are conducted and the color changes are in the first place used to establish their presence. It should be noted that many cations will have similar color chan ges and so a series of subsequent reactions are used in the detection of a certain cation (Page & comfort 11).In this lab we divided the cations to be characterized into two sub groups, this was done by selective precipitation. The hang was then separated physically be centrifuging as it settles out and the supernatant liquid decanted. This was the first mensuration where the large group was separated into smaller groups so that a definitive test can be performed to verify the presence or absence of a specific cation. The cations were classified into two groups according to their power to dissolve. Group A had ( Bi+3, Fe+3 and Mn+2) while group B had (Al+3, Cr+3 and Sn+4) which were to be used in the two labs. The ions were in a combined unknown solution and they were to be analyzed to establish the cations present. To be sure where any of the cations was present in the solution it was important to run a number of procedures that are described below.In test 1, Mn+2 ions were conf irmed present. In the addition of NaBiO3 the color of