State at least three problems that may be involved when using flame tests for identification purposes

Flame test is a common analytical method in which an aliquot of the solution of a substance is held over a flame and the color imparted to the flame serves as a means of identifying the cation present.

May cations can be identified through the unique color that they impart to a flame. This is of utmost importance in analytical chemistry.

However, there are many issues associated with flame test such as;

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a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.