Phet: Sugar & Salt Solutions
Simulation
*Go to Ms Bs website – click on S & S Sol Sim
Phase II: Explain
FQ: How does the amount of water influence the
concentration of a solute?
Answer the following in your science notebooks…
Phase I: Explore
1.
Select the
“Macro” tab on the sim.
2.
Check the
“Show values” box for
various measurements
to appear.
3. For 1-2 minutes freely explore the sim by
creating different solution combinations and
concentrations.
TIPS:
*You can empty the shaker by clicking on it and moving
it back and forth.
*A shaker is empty when the color changes from white to
gray.
DO NOT USE ANYTHING IN THE
“CONDUCTIVITY” BOX!!!
Please answer the following questions using
vocabulary such as increases, decreases, or stays
the same. Include any relevant measurements
that will provide further supporting evidence.
a. What happens to the volume of water when
you move the slider all the way to the right
on the faucet on top of the screen?
b. What happens to the volume of water when
you move the slider all the way to the right
on the faucet attached to the tub?
1. Find and click the “Reset All” button
2.
Check
Amt of water
Salt Concentration
the “Show
(L)
(mol/L)
Values” box for
2.0
various
measurements to
1.5
appear.
3.
Make a
1.0
table like this
0.5
one…
4.
Add
water to tub
until reach 2.0 L mark.
5. Pour all of the salt into the tub.
6. Record the salt concentration in the table
7. Change the volume by using EVAPORATION
to reach each of the volumes in the chart
8. Construct a line graph of the amount of water
vs. salt concentration.
9. Describe the relationships between the two
variables.
Phase III: Application
1. Select the “Reset All”.
2. Check the “Show values” box for concentration
measurements to appear.
3. In the “Solute” box choose “Sugar”.
4. Follow steps 4-9 from the previous Phase using
sugar instead of salt.
Amount of
Water (L)
Sugar
Concentration
(mol/L)
2.0
c. What happens to the volume of water when
you move the evaporation slider to “lots”?
1.5
1.0
0.5
d. Is it possible to have 0L of water in the tub?
If yes, how?
Phase IV: Investigation
1. Click “Reset all”
2. Move the “Conductivity” system into the
water.
3. Record what happens with the light
4. Start adding salt
7. Describe what happens when sugar is
dissolved in the water
8. Draw a quick picture of this situation
9. Use these two simulations to make a
prediction of why salt dissolved in water
conducts electricity, but sugar does not.
5. Record what happens to the light
6. Click “Remove Salt” (leave conductivity
in)
7. Add salt until the concentration reads
about 1.0 mol/L
8. Record if the light is shining or not
9. Add 0.5 L more water to the tank
10. Record observation of the light brightness
11. WITHOUT resetting anything, find two
ways to increase the brightness of the
light again
12. “Reset all” again.
13. Repeat steps 1-5 with sugar rather than
salt…be sure to record observations of the
conductivity system.
PHASE V – MICRO
1. Click on “micro”
2. Add salt to the solvent
3. Describe what happens when salt is
dissolved in the solvent.
4. Draw a quick picture of this solution
5. “Reset All”
6. Now add sugar
PHASE VI – Water
1. Click on “Water”
2. Click and drag the Salt particles into the
water.
3. Note what happens
4. Reset All
5. Click and drag the sugar molecules into
the water
6. Note what happens.