In your own words, what is Qualitative Chemical Analysis? How is it useful in today's world?
20 Comments
2/2/2011 11:51:34 am
Qualitative Chemical Analysis is a method used to separate cations and anions in a sample substance. Using a series of tests with certain substances, the main substance can then be identified.
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Ms. Lalla
2/2/2011 12:23:14 pm
Hmmm..well Cheneisse what about its uses in our world today? Do you think Qualitative analysis only involves what we learnt in class?........What do you guys think?
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shoshana granger
2/2/2011 01:24:24 pm
gd night...i think that qualitative chemical analysis is a topic that deals with identifying or seekin to identify the elements present in a compound. Its almost as doin several tests to determine wheather a substance is made up of a certain metal, ion etc.
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Ms. Lalla
2/2/2011 01:37:53 pm
Ok Shoshana I think you're heading in the right direction. But how is this IDENTIFICATION useful to man? ANyone?
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3/2/2011 12:15:41 pm
I dont think it involves ONLY what we learnt in class. It can be used in biochemistry to determine the presence or absence of a particular compound, chemists also use it but more in depth methods to determine what what the compound could be. I am really not sure how this information is useful to the average person though. :(
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Nuriyah Ibrahim
3/2/2011 12:59:33 pm
hey...qualitative analysis is the identification, either present or absent of cations and anions in a particular mixture or substance, to identify an unknown compound, different substances are added and the reaction that takes place tells you what cation or anion is present or absent. In today's world qualitative analysis is used in the chemical industry, if something gets contaminated, qualitative tests are done to try to find out what the contaminant is and then they may want to find out how much contaminant was there...i hope my answers are correct!!...=]
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shoshana granger
3/2/2011 01:39:16 pm
In response to the question on how the identification of the ions present in a substance is usefull to man, i would say that in testing a compound for the absence or presence of a certain element will allow chemist the knowledge of what is then needed to be added to that substance for a desired product to be produced. What i'm sayin is simply that scientists makes drugs and different medications as they are familiar with what elements and substances blend to give a certain result so in using qualitative chemical analysis, when a substance is tested for cations or anions, it can be usefull to scientist/chemist in the sense that they would know what else is required for a product to be made in order for the proper functioning of that product when it is used by man....(drugs, tablets, medication, soaps etc)...thats jus what i think!
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Ms. Lalla
3/2/2011 02:33:39 pm
Ladies your contributions are much appreciated and it is not a matter of being right or wrong. We are all here to learn. Just remember our discussion page is not a test, so you girls can do some research and contribute. So Shoshana, the ideas that you have look them up and see whether there are facts to back up your claims......
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Kemega Smith
3/2/2011 02:44:52 pm
Hi evry1, a pleasant gdnite, in my opinion, as far as I cud think, qualitative chemical analysis is the simply testing substances with various compounds to determine what cation or anion is present, & this is determined by various observations, either a colour change, precipitate formed, solution formed or gas evolved. I will think that qualitative chemical analysis be used by lab technicians in hair products companies, probably to determine particular substances as to know what may have caused hair growth or less frizziness. In kitchens where chefs may wish to test ingredients b4 use or new fruits or newly discovered food to test 4 harmful substances, doctors to also test blood or body fluids for substances during diagnostics & also agricultural uses to help figure out elements that may help grow plants etc, in addition it may b helpful in testing rain 2 have an idea of harmful elements, gases present. Umm, while making various naturalized products, leafs, barks etc tested to find out if that item may contain a particular element that might b needed in the process of making new products... If I think of n.emre uses I'll post!!! Gdnite :)
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Rachael Edwards
4/2/2011 03:04:28 pm
Hi everybody :D Qualitative Analysis deals with conducting tests on a variety of substances to find out which anions or cations are present/absent. The results obtained usually involve a colour change of the unknown soultions and whether a soluble/insoluble precipitate or even gas ( as the case with NH4+) is formed. It can be useful in today's world. For example, in labs where snacks and other food items are manufactured, the scientists would need to know how and which cations/anions would react with various solutions and if it would be wise to use them in food.
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Jaya Ramkissoon
5/2/2011 09:10:32 am
hey everybody....well I think qualitative analysis is the identifying and separating of chemical components in a substance.It determines the presence or absence of a particular compound.This provides methods for us to determine which chemicals are present in the environment around us. I've found some more interesting uses of qualitative analysis so i'll post it up when i fully understand it and can properly explain it...
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Ria Bally
6/2/2011 07:58:23 am
HI!!! Quantitative analysis is the process by which various tests are conducted in order to identify the cations and anions present an an unknown substance. Finding the cations and anions will tell you what the unknown substance is composed of an thus, it will tell you what the substance is...
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6/2/2011 09:06:38 pm
Hi!!!!! :) Qualitative chemical analysis is a branch of chemistry that deals with the identification of elements or grouping of elements present in a sample. In today's world, it can be useful in forensics. Qualitative analysis is the necessary starting point. After all, it is necessary to know what is present before determining how much of it is there. Qualitative analysis is most often undertaken in forensic drug analysis. For example, if an unknown white powder is submitted for drug analysis. The results of a qualitative analysis might show that the powder contains cocaine mixed with flour.
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Ms. Lalla
7/2/2011 08:06:02 am
Bernelle good contribution however bear in mind that qualitative cannot be measured only describe!!
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Sarah Khadan
7/2/2011 12:01:31 pm
Hi everybody!! :) In my opinion, Qualitative analysis is a method used to identify cations or anions present or absent in a substance usually indicated by a colour change, precipitate formed, whether it is soluble/insoluble by adding excess and also a gas may be released. Qualitative analysis is used in the industry today, for example it might have been used to identify the melamine (a chemical used in plastics) that was used in baby's milk powder in China to increase protein level causing many deaths. It may also have been used to identify lead (which is extremely toxic) in the paint of some toys, resulting in a recall of millions of toys in America. This proves that qualitative analysis is a very important part of the industry and is widely used today.
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Shenyce John
12/2/2011 03:36:52 am
Morning!.......In my opinion qualitative analysis is breaking down a substance to identify what elements or compounds make up that substance and the behaviour of certains elements with eachother.
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Shenyce John
12/2/2011 03:46:52 am
It is used for identifying compounds and elements in medicine and food products and it is also used to test urine for drugs and alcohol. Basically,for me qualitative analysis is identifying what a substance is composed by using observations.
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Aisha Pierre
14/2/2011 09:38:50 am
Hey everyone, in my opinion qualitative analysis is finding out what cations or anions are found in a salt or mixture of salts. Also gases within the mixture can be identified by using various method. In today's world for example qualitative analysis can be used in airports and in the olympics when people use creative ways to sneak drugs and other dangerous substances into another country by mixing it with another substance. Some jobs requires harmful gas exchanges, simply by knowing what gas is present/escaped in the air can save the lives of employees.
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Tiffani Johnson
24/2/2011 10:40:51 am
Hi good day. This is Tiffani :D. I think Qualitative Analysis is the study of substances and the identification of their components. It is useful to mankind because it enables doctors to know what a certain substance contains and how it is either harmful or beneficial to our health as an example. It helps farmers because they are able to know what their soil and fertilizers contain and this in turn lets them produce healthy and abundant crops. Another way qualitative analysis has helped mankind is that it has enabled us to know what pollutants are involved in pollution and as a result we are able to educate ourselves and others about the effects of each pollutant and what we can do to reduce them if not completely stop them.
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cheneisse simmons
14/4/2011 12:41:34 pm
I love it!
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