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Chemical reaction trends and solubility

Categories: Chemical Reaction

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 enerally 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.

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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.

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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, Calcium, Copper, Zinc, Nickel, and Magnesium follow the rule of the anion. 5. On scratch paper. 6. If potassium hydroxide mixed with zinc sulfate the reactants would mix to form solid zinc hydroxide and soluble potassium sulfate.

This is because hydroxide is a enerally insoluble anion and zinc is a cation that follows the rule of the anion so zinc hydroxide is insoluble and a precipitate will form. Potassium is a cation that is always soluble, therefore it overrides the rule of the anion but regardless, sulfate is also a generally soluble anion. My observations coincide with my prediction because when I mixed potassium hydroxide and zinc sulfate, a slightly cloudy clear liquid formed which indicates the formation of the solid zinc hydroxide in the reaction. 1 . The reactivities of the four elements in increasing order are Cu

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Chemical reaction trends and solubility. (2018, Oct 12). Retrieved from https://studymoose.com/chemical-reaction-trends-and-solubility-essay

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