In your experiment, follow the instructions below. Step 1 : Obtain Electronic Ba
ID: 913425 • Letter: I
Question
In your experiment, follow the instructions below.
Step 1: Obtain Electronic Balance.
Use the Equipment selection from the toolbar.Select Electronic Balance from the choices for Balance.
Step 2: Obtain a 250 mL beaker.
Use the Equipment selection from the toolbar.Select the 250 mL beaker from the choices for Beaker.
Step 3: Weigh dry 250 mL beaker, record weight.
Place the beaker on the balance.Read the mass, in grams, from the front of the balance.
Step 4: Add 10 mL of unknown (salt solution).
Move the beaker from the balance onto the workspace (notice that the value on the front of the balance changes to 0).Right-click on beaker and select Chemicals. A Chemicals window will appear on the workspace.Select Unknown from the dropdown menu.Increase the volume from 0 to 10 mL.Click OK. The solution will be placed in the picked beaker.You will see a white area appear on the bottom of the beaker. This represents your solution.
Step 5: Weigh beaker + solution, record weight.
Place the beaker on the balance.Read the mass, in grams, from the front of the balance.
Step 6: Evaporate the water.
Move the beaker from the balance onto the workspace.Right-click on the beaker and select Thermometer. A thermometer will appear in the beaker. Record the temperature reading.From the Equipment selection on the toolbar, select Bunsen Burner.Place it directly under the beaker. The increase in temperature shows that the water is heating up.As the water begins to boil, record the temperature.Allow the water to boil off. (You will see only a black mass, with exactly two bouncing spheres, when the water is completely gone.)Once the water is gone, remove the flame from the beaker and allow it to cool to 20 degrees Celsius.Weigh the beaker. This will be the weight of the salt. Record its mass.
Step 7: Calculate the percentage of mass for salt to water.
Follow the steps shown in the Observations area of the Model ChemLab Experiment.
STEP 3: Write Your Lab Report
Follow the directions above to write your lab report. Write your lab report in Microsoft Word. A lab report template is available in Doc Sharing to assist you in writing your lab report.
In the discussion section of your lab report, include the following information.
Calculate the percentage of salt to water concentration. Use the step-by-step calculations shown in the Observation tab of the lab.How many moles of NaCl were present in the saltwater solution? Be sure to show your work.Calculate the molar mass of these common kitchen substances. Be sure to show your work.Vinegar (CH3COOH)Baking soda (NaHCO3)Sugar (C12H22O11)Caffeine (C8H10N4O2)Is salt water a homogeneous or heterogeneous mixture? Why?Why are you able to use heat to separate a mixture of salt and water? (Hint: Look up the boiling point of water and the melting point of NaCl.) I also have to conduct introduction, major finding results, conclusion
Explanation / Answer
This is a software based question to demonostrate the calculation of Molarity of an aqueous solution.
Without help of the software or the website mentioned it is not possible to write the lab report.
The mixture is a Homogenous solution.
Boiling can be used to separate the components of the mixture. Boiling Point of water is 100 oC and the Melting Point is 801 oC. Thus at the boiling point of water NaCl will remain unaffected.
Molar Mass of NaCl = 58.44 g/mol
Molar Mass of CH3COOH = 60.05 g/mol
Molar Mass of Baking Soda = 84.01 g/mol
Molar Mass of Sugar = 342.30 g/mol
Molar Mass of Caffeine = 194.19 g/mol