Chemistry
Ion Models Name_________________ Pre‐lab Questions: 1. An ionic compound is composed of __________________ and ________________ ions. 2. Cations are found on the ________________ side of the periodic table. Are they metals or non‐
metals? ____________________________ 3. To form an ionic compound, the positive charge of the _________________ must balance the negative charge of the ________________. 4. How do you determine the charges of monatomic ions? ______________________________ 5. Which group of elements on the table has various charges? _____________________________ 6. What is a polyatomic ion? ________________________________________________________ 7. Which polyatomic ion is shown in the graphic above? ____________________ What is the chemical formula for this compound? _____________________________________________ 8. Why are parentheses used with polyatomic ions? ____________________________________ Purpose: To model a chemical reaction using paper ion models. Procedure: Using the ion paper models, create a visual representation of the chemical reactions you performed in the Ionic Compounds lab. 1. Identify ion models with the same charge as the ions used in the experiment. Write their symbol on the model. (See example at top of page.) 2. Choose a unique color to identify each ion. On the big sheet, make a key to show the color of the elements. Example: ☐ Sodium ☐ Magnesium ☐ Sulfate ☐ Copper ☐ 3. Cute out and glue the models on the large sheet to show the entire reaction. Each person in your lab group will do one reaction. The big sheet will show all 4 reactions. Label the compounds on the sheet above the reaction. Example below. *Note: The charges are balanced, but the equation is not. Balance charges first, then balance the equation. Na3PO4 + CuSO4  Cu3(PO4)2 + Na2SO4 +3
-3
+2
-2
+6
-6
+2
Balanced equation is: 2Na3PO4 + 3CuSO4  Cu3(PO4)2 + 3Na2SO4 O’Ryan
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