The Solubility of Ionic Compounds
Purpose: The purpose of this lab was to find a set of guidelines that can help you predict the solubility of ionic compounds and to test various types of combinations of reactants to observe a precipitate. More importantly, this experiment gives us the experience on how to predict the solubility of other ionic compounds in different situations.
Hypothesis: I predict that some anions, once reacted with the cations, will be soluble and some will be insoluble.
Since the bigger molecule/atom is, the higher the level of solubility and the larger the charge, the less the solubility. I predict that Na, NH4, Ba, Ca, Cu, Mg, Ag and OH will be soluble due to their small charge and Cl, Br, CO3, PO4, SO4. CH3COO, Fe, S, and Zn will be insoluble.
Materials: 24-well spot plate
White paper
labelled dropper bottles of aqueous solutions with following cations: NH4+,
Ba2+, Ca2+, Cu2+, Fe2+, Mg2+, Ag+, Na+, Zn2+......
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