How would you test for so4 2- in an aqueous solution?

Answer :

The test for ion :

Procedure :

1) In a test tube, add 5-10 drops of aqueous solution of .

2) Add 1-2 ml of HCl solution and Barium chloride solution in the test tube.

The formation of white precipitate indicates the presence of ion.

The chemical reaction is,

The White precipitate of formed in this reaction.

the correct answer is:

a. formation of precipitation

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.