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Ions - a qualitative analysis on our chemicals by flame testing.

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Introduction

Ions Introduction When an atom absorbs light or when an atom bonds an electron can be gained or lost and what is left is an ion. If the ion gains an electron it has become a negative ion and if it losses an ion it becomes a positive ion. This is because the balance of the electrons protons is disturbed. Nature is no stranger to science and within the great outdoors in area which mountainous fresh countryside areas are. It has statically been proven that these areas which make u feel comfortable and relaxed contain a high concentration of negative ions. Where as areas with high concentrations of positive ions seem to make us feel uncomfortable and irritable. After a storm the air feels clean and refreshed this because they are filled with negative ions. Many people find the atmosphere before a storm is heavy and oppressive. This is due to the build up of positive ions within the air. Within areas high with a high concentration of positive ions it has be known to trigger of allergies and asthma. It is all very well knowing what ions are and how they create an affect on us but how can they be recognised. The most obvious and fairly accurate way at the present time is qualitative analysis. Qualitative analysis is a body of features used to identify or quantify the chemical composition of a chemical substance. When seeking to identify a chemical in a substance scientist carry out a qualitative analysis experiment. On the other hand if a scientist wishes to find out the amount of a chemical in a substance the scientist will carry out a quantitative experiment. ...read more.

Middle

Lithium is used commonly with aluminium and magnesium to form alloys. It is also used in batteries, greases, glasses and medicine. iv. Potassium- An element found on the periodic table as K its atomic number is 19 and has an atomic weight of 39.0983 and is classed as an alkali metal. v. Sodium- An element found on the periodic table as Ca its atomic number is 11 and has an atomic weight of 22.989770 and is classed as an alkali metal. Sodium is generally used to make soap and table salt. vi. Barium- An element found on the periodic table as Ca its atomic number is 56 and has an atomic weight of 137.237 and is classed as an alkaline earth metal. Small amounts of barium compounds are used in glasses and paints. vii. Magnesium- An element found on the periodic table as Ca its atomic number is 12 and has an atomic weight of 24.3050 and is classed as an alkaline earth metal. is used commonly with aluminium and Lithium to form alloys. * Bunsen burner- A laboratory gas burner invented in 1855 by Roberts Bunsen. The Bunsen burner has a vertical metal tube flows through. The vertical tube has a while located at the bottom of it which is used to admit air. When the whole is closed a yellow safety flame is displayed. Where as when the whole is open it displays a power dull blue flame with a faint blue outer flame with a vibrant blue core used u for combustion and hearting. * Acid- a substance that is on a scale form 1 to 6 on the ph meter and can be used for neutralising alkalis. ...read more.

Conclusion

Another potential error standing in my way was the contamination of the wire. The wire could be contaminated due to the fact that it may not be totally cleaned by this acid. I overcame this error by changing the wire every 2 substances. Overall by looking at the problems and potential problems I had I think I didn't carry out a very accurate experiment. With all the minor problems I think the accuracy was not as good as it could have been. I think that the method and the equipment and the materials for this experiment are great for maximum accuracy but they do not eliminate the chance for human error. Over all out of the whole experiment I enjoyed the theory the most due to the fact that it enhanced me knowledge about preparing accurate chemical solutions and it showed me it just wasn't a basic skill but a crucial skill which involved a high level of accuracy I also enjoyed conducting the experiment even though I encountered many errors I enjoyed finding a solution to them. I also think that this experiment has challenged me mentally in every academic way. It has also helped me to develop personal thinking strategies. During this experiment I learnt quote a lot and enhanced my general knowledge of chemicals as a whole and I learnt practical skills of preparing chemical solutions which I will be able to use in the future. Over all this experiment has been an interesting and an enlightening experience which I have gained many skills and much knowledge even though I had encountered many problems I enjoyed the experiment thoroughly and would gladly repeat it. ...read more.

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