Qualitative Analysis Essay

Qualitative is where the results give a colour that you study to forgather up to a colour chart, or give up you postulate done to ascertain if it is positive or negative with a description of what a positive reaction should compute like. This tally is less unquestionable as some colour or positive reaction look similar to each other or the same but by adding disparate chemicals. An modeling of qualitative would be a pH test as the result gives you a colour and then you prolong to match it up to the pH scale to get you final result. Qualitative epitome is used to find show up different ion in a devoted sample. This also analytical chemistry technique, this testing method uses many different tests to get a reaction that would link with different ions. IonsAn Ion is an electrically aerated particles that are formed when atoms are added or taken elbow room. Metal atoms own positively charged ions and non-metal atoms have negatively charged ions. To work out how many io ns a metal and non-metal should have is simple. Metals should have the same totality of charged ions as the group number they are in for example a metal in group 2 will have two positively charged ions. Non-metals should have the same amount of charged ions as the group number they are in but subtraction eight for example a non-metal in group 5 would have 3 negatively charged ions.Negative ions are called anions and positive ions are called cations. When testing for cations/metals you could use a flame test this is the simplest and quickest way of test for cations another way that you could test for cations is a sodium hydroxide test this test consist of adding sodium hydroxide to test increase when coloured come down is formed them stop adding the sodium hydroxide and see what the cation is by using the table below, this table show what colour the precipitate is and any further results.