Mixtures and Solutions: Investigation 3

To make a solution less concentrated:

• Volume

• Concentration

• Dilute

The amount of material dissolved in a certain amount of liquid:

• Volume

• Concentration

• Dilute

The amount of space taken up by something:

• Volume

• Concentration

• Dilute

I have 2 pitchers of Kool-Aid. Both of them have 1 Liter of water. I add 6 scoops of Kool-Aid to pitcher A, and 9 scoops of Kool-Aid to pitcher B. Which pitcher will be more concentrated?

• A

• B

I have two pitchers filled with 7 scoops of Kool-Aid powder. I add 2 Liters of water to pitcher A, and 4 Liters of water to pitcher B. Which pitcher will be more dilute?

• A

• B

I have 3 salt solutions. How can I tell which ones are the least concentrated?

• I compare all 3 with a balance. The heaviest one is the most concentrated.

• I measure out 70 ml of each solution. I compare all three using a balance. The lightest one is the least concentrated.

• I compare all 3 solutions with a balance. The one that has the least amount of solvent is the least concentrated.

Answer explanation

Remember: we always have to make sure we have the same amounts when comparing in order for our measurement to be accurate.

As more solute is added to a solution, it becomes more concentrated.

• True

• False

You are able to tell which solution is the most concentrated by looking at it.

• True

• False

Answer explanation

We may have been able to do this with the Kool-Aid, but that is not true for all solutions.

If you have 2 solutions, the one with less solute will be more:

• Diluted

• Concentrated

A - 30 grams of solute is added to 100 mL of water.

B - 20 grams of solute is added to 200 mL of water.

Which one will be more diluted?

• A

• B

Answer explanation

Not only does it have less solute, but there is more solvent for it to dissolve into.