Qual IV Unknown Examination Obiective To identify the presence or ahsence of 5 c
ID: 560398 • Letter: Q
Question
Qual IV Unknown Examination Obiective To identify the presence or ahsence of 5 cations from a total of 14 cations. 32. Bi, Al, Mn, Ca, Ba week, you are to create a procedure showing how you can isolate and identify all of the cations on your list. Out of the 5 cations you have on your paper, there can be as little as 1 in your unknown or as many as 5, or any number in between. You must know how to isolate and identify those in your unknown. There will be no talking during this 2 hour, timed lab. It will be closed book exam, you must work from vour procedures only, and you may not confer with your classmates You have chosen a piece of paper from your instructor, which has 5 cations listed on it. In the nes Procedure To analyze the unknown, you must prepare a hand written procedure in advance. You are not allowed to use sections of the lab as cut out your unknown cations. Before you begin, note if there is a color associated with your unknown. Is it colorless? Does it have a color? If so what does that tell you about your solution? ts for your paper. Observation is critical in identifying Once you have examined your initial unknown for any identifiable characteristics it is a good idea to divide your unknown in half. This helps if you need to go back and try your experiment again, or if for some reason your sample becomes contaminated. You will always have the original sample to work with. Using your procedures, begin your experiment, following all the steps and procedures needed to isolate and identify your unknown cations. Once you have identified your cations, write down the ones you have in your solution below. I have these cations in my unknown solution. Cations present in solution Cations not present in solution Number Name from the piece of paper I received from my instructor. DO NOT FORGET TO SIGN YOUR NAME TO THIS PAGEExplanation / Answer
The alkaline earth metals are generally colourless. THe d-blochk elements are usually coloured.
Blue or Bluish green May be Cu2+ or Ni2+ Greenish May be Ni2+ Light Green May be Fe2+ Dark brown May be Fe3+ Pink May be Co2+ Light pink,flesh colour or earthy colour May be Mn2+ White May be Cu2+, Ni2+, Fe2+, Fe3+ and Co2+ etc are absent.