Types of Chemical Reactions s2

Types of Chemical Reactions Name: Lab Group Members: X X The Lab Problem:

HCl and NaOH solutions are very corrosive. If you spill any on your skin, immediately begin flushing with water and notify your teacher.

1. Perform each reaction according to the directions and record your observations. For each observation, explain what it tells you about the products. 2. If you see no immediate evidence of reaction, set the test tube aside for 10 minutes then re-examine. 3. When the directions tell you to “perform the gas test”, you should have a partner light a match and hold it near the mouth of the test tube while you uncover the test tube. WARNING: It may be loud! Please don’t get scared and drop the test tubes!

4. Complete the equation for each reaction that occurs. Chemical Reactants and Products Evidence of Reaction 1. Mg (s) + HCl (aq) Place a 1/ inch piece of magnesium ribbon in a test tube. Add 10 2 drops of HCl and quickly cover the mouth of the test tube with another inverted test tube. Wait 1 minute and perform the gas test.

2. Ca (s) + H2O (l) Place a few pieces of calcium metal in a test tube. Add 25 drops of distilled water and quickly cover the mouth of the test tube with another inverted test tube. Wait 1 minute, then perform the gas test.

3. Cu(NO3)2 (aq) + Na2CO3 (aq) Put about 10 drops of copper (II) nitrate in a test tube. Add 10 drops of sodium carbonate and observe. 4. Zn (s) + HCl (aq) Place a piece of zinc metal in a test tube. Add 10 drops of 3M hydrochloric acid and quickly cover the mouth of the test tube with another inverted test tube. Wait 1 minute, then perform the gas test.

5. H2O2 (aq) Add about 25 drops of hydrogen peroxide in a test tube. Add a small pinch of manganese dioxide. Quickly light a match, hold it over the test tube and observe. MnO2 is a catalyst. It is not consumed in the reaction, and its formula is written over the arrow in the equation to indicate its presence.

6. CuCO3 (s) + HCl (aq) Put a pinch of copper (II) carbonate into a test tube. Add 10 drops of 3M HCl and observe.

7. Zn (s) + Cu(NO3)2 (aq) Place a piece of zinc metal into a test tube. Add 10 drops of copper (II) nitrate, mix well, and observe.

8. Mg (s) + O2 (g) Hold a 1 inch piece of magnesium ribbon with a pair a tongs, bring over a Bunsen burner flame and observe. DON’T LOOK DIRECTLY AT THE BURNING MAGNESIUM! Conclusion:

1. Classify the major type of each reaction as either: decomposition, synthesis, single replacement, or double replacement. 2. Write the complete balanced equation for each reaction. Include symbols to denote the state.

Type of Reaction Balanced Chemical Equation