ChemLab #12 - Predicting Reaction Products
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6M HCl and NaOH are corrosive. If you spill any on your skin, immediately begin flushing with water and notify your facilitator. |
2. Use your knowledge of reaction types to complete the equations. Have your teacher approve the completed equations.
3. Perform each reaction according to the directions and record all evidence of a chemical reaction. Hint: some reactions may be slow.
Teacher Demo - Hint: there are two products, one is a gas the other is an aqueous base.
2. Mg (s) + HCl (aq) →
Place a piece of magnesium ribbon in a chemplate well. Add 10 drops of 6M HCl and observe.
3. Zn (s) + HCl (aq) →
Place a piece of mossy zinc metal in a chemplate well. Add 10 drops of 6M HCl and observe.
4. Cu (s) + HCl (aq) →
Place a piece of copper metal in a chemplate well. Add 10 drops of 6M HCl and observe.
5. Zn (s) + CuSO4 (aq) →
Place a piece of mossy zinc metal in a chemplate well. Add 10 drops of copper (II) sulfate and observe.
6. CuSO4 (aq) + ZnCl2 (aq) →
Put about 10 drops of copper (II) sulfate in a chemplate well. Add an equal amount of zinc chloride and observe.
7. Ca (s) + H2O (l) →
Put a piece of calcium in a chemplate well. Add 10 drops of water and observe.
8. HCl (aq) + NaOH (aq) →
Put 1 drop of phenolphthalein in a chemplate well. Phenolphthalein is an "indicator" that is colorless in an acid and purple in a base. Add 10 drops of 6M HCl to the well. Slowly add the same amount of 6M sodium hydroxide, 1 drop at a time, and observe.
9. Mg (s) + O2 (g) →
With tongs, bring a piece of magnesium ribbon over a burner flame and hold until the reaction is complete. Place the reaction product in a chemplate well and observe.
10. KI (aq) + Pb(NO3)2 →
Put 10 drops of potassium iodide in a chemplate well. Slowly add 5 drops of lead (II) nitrate and observe.