Try making your own website
For those who are interested you can create a website that will host your lab reports. The result might look something like my example below for Lab 0301 - Types of Reaction.
Have a great day!
Have a great day!
Types of chemical reactions
The purpose of this lab is two fold. First I should gain experience working in the lab. Second, I will get to see a variety of reactions as they happen.
Reaction Type #1: Synthesis
- Use a piece of sandpaper to clean a piece of copper wire. Examine the wire and note its appearance.
- Using crucible tongs, hold the wire in the hottest part of the burner flame for 1 - 2 minutes. Examine the wire and note any changes in the wire caused by the heat.
- Repeat the process with a piece of magnesium ribbon. Place an evaporating dish next to the base of the burner. DO NOT LOOK DIRECTLY AT THE FLAME! HOLD THE BURNING MAGNESIUM AWAY FROM YOURSELF AND OVER THE EVAPORATING DISH!
Reaction Type #2: Decomposition
- Use the tip of your scoopula to obtain a small amount of copper (II) carbonate in a clean dry test tube. Note the appearance of the sample.
- Using a test tube holder, heat the sample in a burner flame for about 3 minutes. Turn off the burner and insert a burning wood splint in the test tube. What gas does the result of this test suggest as one of the product of the reaction? Note any changes in the appearance of the material in the test tube.
- Place a very small amount of manganese dioxide into a clean dry test tube and place the test tube in the test tube rack. Record your observation of the hydrogen peroxide and then add about 1.0 mL of hydrogen peroxide to the test tube with the MnO2. After the reaction begins, place a glowing wood splint in the mouth of the test tube. What gas does the result of this test suggest as one of the products? Note any changes in the appearance of the materials in the test tube.
Reaction Type #3: Single Replacement
- Half - fill one of the wells in the spot plate with 6M HCl. Record its appearance. Add a small piece of zinc to the acid and immediately cover the well with a small test tube. Observe what happens.
- After about 30 seconds of collecting the gas that is evolved, remove the inverted test tube using a test tube holder. QUICKLY insert a burning wood splint into the mouth of the test tube. What gas does the result of this test suggest is contained in the products?
- Add 5 drops of copper (II) sulfate solution to another well of the spot plate. Now place a clean piece of mossy zinc into the well and let it remain there for about 3 minutes. Remove the zinc from the solution. Note the appearance of the zinc and the solution before and after the reaction.
Reaction Type #4: Double Replacement
- Add 2 drops of 0.1 M zinc acetate to a clean dry well in the spot plate. Next add about 2 drops of 0.1 M sodium phosphate to the same well. Observe what happens and note any changes in the mixture.
- Repeat this procedure using 0.020 M lead (II) nitrate and 0.010 M potassium iodide.