Introduction The majority of ionic solids are soluble in water, the ones that are not, form precipitants when two aqueous solutions are mixed. When certain cations and anions combine, they create a solid product called a precipitant, but determining factors of the formation may vary. These can form because of chemical reactions (demonstrated in this experiment) or by the change in the solubility of a substance by the change in temperature, pressure, etc. Precipitants are most likely to form in an aqueous double displacement reaction with occurs with the ions of two compounds switching places or an aqueous single displacement reaction, where a single ion will replace an ion in a compound. Whether or not a reaction occurs can be based on the …show more content…
The questions that don’t match up with my observations are questions; 6, 7, 8, 10, 14 & 16. 3. Which cations tend to form precipitates and which anions tend to form precipitates? The cations that tend to form precipitates are 4. When a precipitate does not form, why is it stated that no reaction has taken place even though the compounds were mixed together? When a precipitate does not form even though the compounds were mixed it is proper to write that the compounds had no reaction. This occurs because a precipitate forms when a chemical reaction has taken place leading to one of the products becoming a solid and one aqueous. If the reactants of the product are both aqueous then the two solutions will just mix into each other but on the chemical level have produced “No reaction”. 5. How and why do precipitates form? Precipitates form during chemical reactions when cations and anions in aqueous solutions combine to form a solid called a “precipitate”. Precipitates form because some anions that mix with cations become an insoluble solid but, this can also end up with the products both being aqueous and having no reaction. 6. Use the solubility rule to predict the products of the following