Pure substances - Have specific melting and boiling points, A formulation - A mixture designed as a useful product, Examples of formulations - Paints, fuels, cleaning agents, Chromatography - This has a mobile and stationary phase, Rf value - Always less than 1, CO32- - Carbonate ion, NO3- - Nitrate ions, SO42- - Sulfate ion, Anions - Negative ions, Cations - Positive ions,

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