Mass NaHCO36.9341 5. Calculate the moles of NaHCO3 in the sample and record the data below. 0.0825 mol g 6. Drag the 25 mL empty graduated cylinder under the sink tap and hold it there till it fills with water. (When the graduated cylinder is full, it will automatically snap back into place.) Pour that water into the beaker with the NaHCO3. Then pour the beake with the solution into the 50 mL graduated cylinder (the largest one). Hold the 50 mL cylinder under the tap until it fills with water to make an aqueous solution of NaHCO3. 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, below. Volume NaHCO3 = 0.05 L 7. The molarity is calculated using the formula: Calculate the molarity of the NaHCO3 solution in units of mol/L. M 8. If the density of the solution is 1.047 g/mL, calculate the molality of the solution in units of mol/kg. molality= mol/kg 9. Calculate the mass percent of sodium bicarbonate in the solution. % molarity = 10. Calculate the mole fraction of sodium bicarbonate in the solution. moles solute L solution (mass solute/molar mass solute) L solution.
Mass NaHCO36.9341 5. Calculate the moles of NaHCO3 in the sample and record the data below. 0.0825 mol g 6. Drag the 25 mL empty graduated cylinder under the sink tap and hold it there till it fills with water. (When the graduated cylinder is full, it will automatically snap back into place.) Pour that water into the beaker with the NaHCO3. Then pour the beake with the solution into the 50 mL graduated cylinder (the largest one). Hold the 50 mL cylinder under the tap until it fills with water to make an aqueous solution of NaHCO3. 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, below. Volume NaHCO3 = 0.05 L 7. The molarity is calculated using the formula: Calculate the molarity of the NaHCO3 solution in units of mol/L. M 8. If the density of the solution is 1.047 g/mL, calculate the molality of the solution in units of mol/kg. molality= mol/kg 9. Calculate the mass percent of sodium bicarbonate in the solution. % molarity = 10. Calculate the mole fraction of sodium bicarbonate in the solution. moles solute L solution (mass solute/molar mass solute) L solution.
Chemistry
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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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Transcribed Image Text:Mass NaHCO3 = 6.9341 g
5. Calculate the moles of NaHCO3 in the sample and record the data below.
0.0825 mol
6. Drag the 25 mL empty graduated cylinder under the sink tap and hold it there till it fills with water. (When the graduated cylinder is full, it will automatically snap back into place.) Pour that water into the beaker with the NaHCO3. Then pour the beaker
with the solution into the 50 mL graduated cylinder (the largest one). Hold the 50 mL cylinder under the tap until it fills with water to make an aqueous solution of NaHCO3. 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, below.
Volume NaHCO3 = 0.05
7. The molarity is calculated using the formula:
L
Calculate the molarity of the NaHCO3 solution in units of mol/L.
M
8. If the density of the solution is 1.047 g/mL, calculate the molality of the solution in units of mol/kg.
molality =
mol/kg
9. Calculate the mass percent of sodium bicarbonate in the solution.
%
molarity =
10. Calculate the mole fraction of sodium bicarbonate in the solution.
moles solute
L solution
=
(mass solute/molar mass solute)
L solution
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