Making and Naming Ionic Compounds Name:_______________________________________Period:_____________Clean-up:________ Background: By mixing ionic compound solutions, precipitates may form when the cation of one solution comes into contact with the anion of the other solution. The formation of these precipitates indicates a chemical change has occurred. In Part 1, students will observe the formation of ionic compounds by precipitation, write the formula for the compounds, and write overall ionic & net ionic equations with physical states for these precipitates. In Part 2, students will use the information they obtained in Part 1 to identify ionic compounds formed from mixing unknown solutions. After identifying the ionic compounds, students will name the compounds and write the ionic equations with the physical states. Part 1: Making Ionic Compound by Precipitation Procedure: Using the data table as a guide, add equal amounts of chemicals to the reaction vessel. Not the minimum number of drops to determine if a chemical change has occurred. Use this amount of drops for each reaction. Create your own data table and record the color and texture of the precipitates. Note if no precipitate occurred. Be sure to include detailed observations of the reactions. Data Table: (The cations are in the top row as compounds and the anions are in the leftmost column as compounds.) AgNO3 Na2(CO3)2 Na3PO4 NaOH Na2SO4 Pb(NO3)2 CaCl2 FeCl3 MgSO4 CuSO4 Part 2: Identifying Cations and Anions by Making Ionic Compounds Procedure: Using the labels on the chemicals, create a data table to test the solutions for the formation of precipitates. Chemicals A, B, and C contain the cations which can form precipitates. Chemicals X, Y, and Z contain anions which can form precipitates. Design a procedure you will use to identify each cation and anion. Be sure to include observations of the reactions. Data Table: Produce another data table. In each box where a precipitate formed, write the formula and name of the compound. If no precipitate was formed, place an X in the box. TYPED LAB REPORT Must Include: Title of experiment; Date Performed; Your group members names; Purpose; Typed completed data table (Part 1) 1. Write the name and formula for the chemical compounds produced in the mixings. (The cation or anion is the reacting ion causing the chemical change. The other ion is called a spectator ion. Spectator ions are present during a chemical reaction, but do no participate in the reaction.) 2. Type detailed observations including the color & texture of any precipitate. Typed Equations 1. Type overall ionic & net ionic equations, including physical states, for the precipitates formed from these chemical reactions. 2. Net ionic equations do not include the spectator ions because only the particles that are directly involved in the chemical change are used. The precipitate is written to the right of the arrow, and the ions that produced it are to the left of the arrow. Typed completed data table (Part 2). Identify Unknowns A, B, C, X, Y, & Z. Typed Conclusion Clean-up Initials for all Group Members.