Please complete the entire experiment as instructed in the lab manual except for any modifications noted below. Fill out the report below, insert your digital photographs into the report, and submit it me electronically to the email address
Compare your results with the solubility rules. Do your results generally agree with them? Yes, I feel like my results were comparable to the rules on the table in the chemistry text. 2. Why is water a good solvent for ionic substances?
Water is a great solvent because it has an uneven distribution of its charge on its surface. The oxygen atom holds the shared electrons more closely than the two hydrogen atoms. The partially negative dipoles of the water are attracted to positively charged components of the solute, and vice versa for the positive dipoles. 3. Describe what happens when ionic substances dissolve in water. Because of its high polarity, is an especially good solvent for ionic substances. When ionic substances are dissolved in water, the ions separate and become surrounded by water molecules. This separation of ions is called dissociation. Thus, when sodium chloride dissolves in water, the resulting solution contains sodium ions and chloride ions. 4. Why might spectator ions be necessary a reaction?
Because any solution we make has to be electrically neutral. You can’t have a solution of just chloride ions; it has to have a positive ion with it. So although the positive ion may be just a spectator ion, it had to be there in the solution before mixing. 5. Are precipitates electrically charged?
The Essay on Ionic Bond Solutions Of Lead Nitrate
When ionic solids dissolve, they divide to give their positive and negative ions that make up the solids. These ions become hydrates and have the same relative proportions when in solution and when solid. The more the solid dissolves, the more the ion's concentration increases. This increase and build-up allows for the reverse reaction to occur. In this phase of the reaction the ions crystal lise ...
If the two solutions are mixed, the combined solution will appear milky. This is caused by the formation of an insoluble solid. Since the two solutions were clear initially, this newly formed substance must be the result of achemical reaction. An insoluble product such as this is known as a precipitate. Therefore, precipitates are electrically uncharged.
Write a balanced chemical equation and a net ionic equation for each combination of reactants below. (You might want to see the tutorials titled Balancing Chemical Equations and Net Ionic Equations in the Course Documents section of your course site. Also, your textbook will help.
