Name
Concentration Simulation Worksheet
Define the following terms:
SolutionSoluteSolventMolarityMoles-
a. Question: What is the equation for Molarity?
b. Question: What is the equation for molecular weight?
Part 1: Concentration Simulation
1. For trial 1: Fill up the tank to 1 L, choose solute: Drink mix (solid), drag the purple concentration
meter into the tank.
2. Shake the shaker to add solute to the water until you have approx. concentration = 2 mol/L
Record the exact concentration or “Molarity” in Table 1.
3. Click the circle arrow to begin next trial.
4. Choose Cobalt (II) nitrate (solid). Record its chemical formula in Table 1.
5. Fill your tank to 0.9 L, add solute until your concentration is ~2 mol/L. Record the exact
concentration or “Molarity” in Table 1. If the solution reaches saturation before you are able to
reach this concentration, write “SATURATED” in the molarity column AND place a line through
the moles & grams columns.
6. Repeat steps 4-6 for each of the other solid solutes listed in Table 1. **Be sure to use the
specific volume for each solute listed in Table 1** (e.g. Cobalt chloride should have 0.8 L)
Part 2: Analysis
1. Using the chemical formula you filled out for each solute and the periodic table below, calculate
and fill out the molar mass of each solute in Table 1.
2. For unsaturated trails ONLY, using the formula for molarity, calculate and fill out the “moles of
solute” section on Table 1 for each solute. For Cobalt (II) nitrate only, show your calculations
below:
3. Using the information from the “moles of solute” and the “molar mass” columns on Table 1,
calculate the “grams of solute” for each solute.
Table 1
Solute
Drink mix
Chemical
Formula
Molar Mass
(g/mol)
UKNOWN
UNKNOWN
Volume of
Water (L)
1.00
Cobalt (II)
nitrate
0.90
Cobalt chloride
0.80
Potassium
dichromate
0.70
Potassium
chromate
0.60
Nickel (II)
chloride
0.50
Copper sulfate
0.40
Potassium
permanganate
0.30
Molarity or
concentration
(mol/L)
Moles of
Solute (mol)
Grams of
solute (g)
OMIT
UNKNOWN