mass NaHCO3 (g) molar mass NaHCO3 (g/mol) moles NaHCO3 (mol) liters solution (L) Molarity NaHCO3 (M) . Start Virtual ChemLab, select Reactions and Stoichiometry, and then select Creating a Solution of Known Molarity from the list of assignments. The lab will open in the Titration laboratory. 2. In the laboratory, a bottle of baking soda (sodium bicarbonate, NaHCO3) 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 pickup 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 with a second Scoop. Record the mass of the NaHCO3 in the data table. 4. Drag the weigh paper to the beaker and add the NaHCO3 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 NaHCO3. (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.
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mass NaHCO3 (g)
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molar mass NaHCO3 (g/mol)
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moles NaHCO3 (mol)
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liters solution (L)
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Molarity NaHCO3 (M)
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. Start Virtual ChemLab, select Reactions and Stoichiometry, and then select Creating a Solution of Known Molarity from the list of assignments. The lab will open in the Titration laboratory.
2. In the laboratory, a bottle of baking soda (sodium bicarbonate, NaHCO3) 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 pickup 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 with a second Scoop. Record the mass of the NaHCO3 in the data table.
4. Drag the weigh paper to the beaker and add the NaHCO3 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 NaHCO3. (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.
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