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attached is a lab. I have all the answers. Can someone just write a nice introduction for this lab for me!! thank you

attached is a lab. I have all the answers. Can someone just write a nice introduction for this lab for me!! thank you

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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attached is a lab. I have all the answers. Can someone just write a nice introduction for this lab for me!! thank you

 

2-14: Converting Concentrations to Different Units concentration unit, such as molarity, and then convert the concentration to a different unit. In this Occasionally, when making solutions in the laboratory, it is convenient to make a solution with a certain assignment, you will make a sodium bicarbonate (baking soda) solution of a certain molarity and then convert that concentration to molality, mass percent, and mole fraction. 1. Start Virtual ChemLab, select Reactions and Stoichiometry, and then select Converting Concentrations to Different Units from the list of assignments. The lab will open in the Titration laboratory. 2. In the laboratory, a bottle of baking soda (sodium bicarbonate, NaHCO,) will be next to the balance, and an empty beaker will be on the stir plate. Drag the empty beaker to the spotlight next to the balance, click in the Balance area to zoom in, place a weigh paper on the balance, and tare the balance. 3. Open the bottle by clicking on the lid (Remove Lid). Pick up the Scoop and scoop out some sample by first dragging the scoop to the mouth of the bottle and then pulling the scoop down the face of the bottle. As the scoop is dragged down the face of the bottle, it will pick up different quantities of solid. Select the largest sample possible and drag the scoop to the weighing paper on the balance until it snaps in place and then let go. This will put approximately 1 g of sample on the balance. Repeat this process six additional times so there is approximately 7.0 g of sample. Record the mass of the NaHCO, in the data table. 4. Drag the weigh paper to the beaker and add the NaHCO, sample to the beaker. Click on the green Zoom Out arrow to return to the laboratory. 5. Drag the beaker to the 50 mL graduated cylinder (the largest one) by the sink and empty the sample into the cylinder. Hold the cylinder under the tap until it fills with water to make an aqueous solution of NaHCO). (When the graduated cylinder is full, it will automatically snap back into place.) Note that the solid is added and dissolved before the volume is measured when making a molar solution. Chemists normally use a volumetric flask for making molar solutions, but this is not available in the simulation. Record the volume of the solution, in L, in the data table. 6. Calculate the moles of NaHCO, in the sample and record the data in the data table. Data Table mass NaHCO, moles NaHCO, liters NaHCO3 7. The molarity is calculated using the formula: molarity moles solute L solution =. mass solute molar mass solute L solution
Transcribed Image Text:2-14: Converting Concentrations to Different Units concentration unit, such as molarity, and then convert the concentration to a different unit. In this Occasionally, when making solutions in the laboratory, it is convenient to make a solution with a certain assignment, you will make a sodium bicarbonate (baking soda) solution of a certain molarity and then convert that concentration to molality, mass percent, and mole fraction. 1. Start Virtual ChemLab, select Reactions and Stoichiometry, and then select Converting Concentrations to Different Units from the list of assignments. The lab will open in the Titration laboratory. 2. In the laboratory, a bottle of baking soda (sodium bicarbonate, NaHCO,) will be next to the balance, and an empty beaker will be on the stir plate. Drag the empty beaker to the spotlight next to the balance, click in the Balance area to zoom in, place a weigh paper on the balance, and tare the balance. 3. Open the bottle by clicking on the lid (Remove Lid). Pick up the Scoop and scoop out some sample by first dragging the scoop to the mouth of the bottle and then pulling the scoop down the face of the bottle. As the scoop is dragged down the face of the bottle, it will pick up different quantities of solid. Select the largest sample possible and drag the scoop to the weighing paper on the balance until it snaps in place and then let go. This will put approximately 1 g of sample on the balance. Repeat this process six additional times so there is approximately 7.0 g of sample. Record the mass of the NaHCO, in the data table. 4. Drag the weigh paper to the beaker and add the NaHCO, sample to the beaker. Click on the green Zoom Out arrow to return to the laboratory. 5. Drag the beaker to the 50 mL graduated cylinder (the largest one) by the sink and empty the sample into the cylinder. Hold the cylinder under the tap until it fills with water to make an aqueous solution of NaHCO). (When the graduated cylinder is full, it will automatically snap back into place.) Note that the solid is added and dissolved before the volume is measured when making a molar solution. Chemists normally use a volumetric flask for making molar solutions, but this is not available in the simulation. Record the volume of the solution, in L, in the data table. 6. Calculate the moles of NaHCO, in the sample and record the data in the data table. Data Table mass NaHCO, moles NaHCO, liters NaHCO3 7. The molarity is calculated using the formula: molarity moles solute L solution =. mass solute molar mass solute L solution
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