Reactions in Our World Lab Report Instructions: In this laboratory activity, you will be comparing chemical reactions to nuclear reactions by observing chemical phenomena in action. To prepare for your observations and data collection, you must complete the pre-lab activity worksheet that goes with this lab. Otherwise, you will not have the chemical equations you need to match each chemical reaction. Fill in each section of this lab report and submit it to your instructor for grading.
Title:

Objective(s):

Hypothesis:
1. You will complete your hypotheses using the chart below and the balanced equations from your pre-lab activity. In each row, predict the reaction type(s) for each chemical reaction. Reaction type options are synthesis, decomposition, single displacement, double displacement, acid-base reaction, combustion, and oxidation-reduction. Some reactions can fit more than one type of reaction.
Chemical Reaction
Prediction of Reaction Type
Iron and copper (II) sulfate solution
I predict the reaction between and will yield a single replacement reaction/s.
Lead (II) nitrate and potassium iodide solutions
I predict the reaction between and will yield a double replacement reaction/s.
Magnesium metal and hydrochloric acid solution
I predict the reaction between and will yield a single replacement___ reaction/s.
Electrolysis of water
I predict the reaction between and will yield a decomposition reaction/s.
Burning magnesium
I predict the reaction between and will yield a combustion reaction/s.

Procedures:
Access the virtual lab and complete all sections of the experiments. A summary of steps has been provided for you. List and explain your controlled variables, independent variable, and dependent variable for this lab.
Materials:
Reactions in our World Virtual Lab
Variables:
List your controlled variables, independent variable, and dependent variable for each experiment in the chart below. Remember, controlled variables are factors that remain the same throughout the experiment. An independent (test) variable changes so that the experimenter can see the effect on other variables. The dependent (outcome) variable will change in response to the test variable.
Chemical Reaction
Controlled Variables
Independent Variable
Dependent Variable
Iron and copper (II) sulfate solution

Lead (II) nitrate and potassium iodide solutions

Magnesium metal and hydrochloric acid solution

Electrolysis of water

Burning magnesium

Summary of Steps:
1. Iron and copper (II) sulfate solution
Fill a small test tube halfway with copper (II) sulfate solution. Add a 2.0-gram iron rod to the solution and observe the reaction.

2. Lead (II) nitrate and potassium iodide solutions
Pour about 2.0 mL of lead (II) nitrate into the test tube. Add 5 to 10 drops of potassium iodide solution to the test tube and record your observations of the reaction.

3. Magnesium metal and hydrochloric acid solution
Place one scoop of magnesium turnings into the test tube. Add hydrochloric acid slowly and observe the reaction. Next, place a burning splint near the mouth of the test tube to test for the presence of hydrogen gas.

4. Electrolysis of water
Use a U-tube with electrodes at each end, connected to a battery. Fill the U-tube with water. Turning on the battery, observe the results at each electrode. Next, test for hydrogen and oxygen gas produced at each end of the tube.

5. Burning magnesium
Place magnesium ribbon in a clean crucible (on a clay triangle above a Bunsen burner). Heat until the magnesium begins to burn.
Data:
Complete a data table that includes reaction observations, balanced equation (from the pre-lab worksheet) identification of reaction type (single replacement, double replacement, synthesis, decomposition, acid-base, oxidation-reduction, or combustion) for each experiment in the lab.
Chemical Reaction
Observations
Reaction Type
Balanced Equation
Example:
Sodium and water
Violent reaction, sodium flames in solution
Single replacement, combustion reaction
2 Na + 2 H2O ---> 2 NaOH + H2
Iron and copper (II) sulfate solution

Lead (II) nitrate and potassium iodide solutions

Magnesium metal and hydrochloric acid solution

Electrolysis of water

Burning magnesium