Dissolving Salt
Dissolving Salt
Dissolving Salt
Scenario: Student takes Conductivity measurements after introducing table salt into the water by inserting the sensor probe. In addition, there will be a circuit which will be completed by the water’s ionic compounds which lights a lightbulb.Dissolving Salt Multiple Choice Questions:
Q1: What will happen to the conductivity measurement and lightbulb when the sensor probe is introduced to the salt water?
CONDUCTIVITY SPIKES UPWARD, LIGHTBULB LIGHTS UP
Because salt is an ionic compound, it enhances the conductivity of the water and allows for a completed circuit which lights the bulb.
ADD MORE SALT, PROCEED TO QUESTION 2.
CONDUCTIVITY SPIKES DOWNWARD, LIGHTBULB LIGHTS UP
Because salt is an ionic compound, it enhances the conductivity of the water and allows for a completed circuit which lights the bulb.
ADD MORE SALT, PROCEED TO QUESTION 2.
CONDUCTIVITY SPIKES UPWARD, LIGHTBULB DOES NOT LIGHT UP
Because salt is an ionic compound, it enhances the conductivity of the water and allows for a completed circuit which lights the bulb.
ADD MORE SALT, PROCEED TO QUESTION 2.
CONDUCTIVITY SPIKES DOWNWARD, LIGHTBULB DOES NOT LIGHTS UP
Because salt is an ionic compound, it enhances the conductivity of the water and allows for a completed circuit which lights the bulb.
ADD MORE SALT, PROCEED TO QUESTION 2.
Q2: How does adding some more salt impact the conductivity of the water in the tank?
INCREASE
More salt added:
Now notice what happens when a moderate amount of salt is introduced. The conductivity is clearly going up due to the introduction of ionic compounds (in this case salt).
PROCEED TO PHASE 3/QUESTION 3.
DECREASE
More salt added:
Now notice what happens when a moderate amount of salt is introduced. The conductivity is clearly going up due to the introduction of ionic compounds (in this case salt).
PROCEED TO PHASE 3/QUESTION 3.
NO DIFFERENCE
More salt added:
Now notice what happens when a moderate amount of salt is introduced. The conductivity is clearly going up due to the introduction of ionic compounds (in this case salt).
PROCEED TO PHASE 3/QUESTION 3.
Q3: How does adding the last bit of salt impact the conductivity of the water in the tank?
INCREASE
Finally, notice the increase in conductivity when the last pinch of salt is added to the tank.
DECREASE
Finally, notice the increase in conductivity when the last pinch of salt is added to the tank.
NO DIFFERENCE
Finally, notice the increase in conductivity when the last pinch of salt is added to the tank.