Chemical reaction trends and solubility

Topics: Ion, Potassium, Sodium Pages: 2 (440 words) Published: December 4, 2013
1. In the first group of four reactions, Iron phosphate and calcium phosphate are the two products that are insoluble in water. In the three of the four reactions a cloudy white or yellow formed. This indicated the formation of a precipitate, caused by the generally insoluble phosphate anion. Potassium chloride, Iron nitrate, and potassium sulfate where the products which were soluble in water. With these products there was no evidence of a precipitate forming.

2. Based on the results from reactions A and B for the first group of reactions, the generally insoluble anion is phosphate. In all three reactions that occurred, when phosphate mixed with iron or calcium a precipitate formed. Iron and calcium cations followed the rule of phosphate. Nonetheless in the reactants the potassium cation did not follow the rule of the phosphate anion, this is demonstrated by the fact that before mixing potassium phosphate was transparent clear liquid. No precipitate was formed before mixing.

3. In reaction C, the generally insoluble phosphate anion was not present in the reaction, all products formed were soluble because no precipitate formed. In reaction C essentially no reaction took place because I observed that nothing changed from before the reaction to when I mixed Iron Chloride and Potassium Nitrate. Both products and reactants remained transparent yellow liquids. In reaction D, the phosphate anion was present in the reaction. The reactants- Iron sulfate and Potassium Phosphate- were both soluble because they were both transparent liquids before the reaction. After the reactants were mixed in the tube a cloudy yellow liquid formed indicating the formation of solid Iron Phosphate. The Iron cation followed the generally insoluble rule of the Phosphate anion.

4. Chloride, nitrate, sulfate, and bromide are generally soluble anions. Phosphate, hydroxide, and carbonate are generally insoluble anions. Potassium, Sodium, and Ammonium are always soluble cations. Iron,...
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