When a solution is diluted, its concentration decreases.
TRUE
300
Explain what a "characteristic property" is and name 2 for matter.
It actually describes something specific and helps us identify it. (Melting point, boiling point, freezing point, density, solubility)
300
What are the 2 types of homogeneous mixtures?
Colloids and solutions.
300
Lucy prepares a salt water solution containing 60g of salt and 12L of water. What is the concentration of the solution?
5g/L
300
C1 = 7.5% m/V
V1 = ? mL
C2 = 2.5% m/V
V2 = 0.9 L
1) Convert 0.9 L to 900mL
2) Calculate: 300mL
300
You need a microscope to be able to tell the difference between a homogeneous and heterogeneous mixture.
FALSE
400
What does solubility mean?
It is the maximum amount of solute you can successfully mix into a solvent.
400
Explain what the solute and solvent are.
Solute: substance you are dissolving (ex: kool aid mix)
Solvent: substance that is doing the dissolving (water)
400
C= 14% m/v
m = ?
v = 500 mL
7000g
400
Mr. Costanza dilutes 250 mL of a 0.6 g/L solution to a volume of 750 mL. What is the new concentration?
0.2g/L
400
A solute always takes the same phase of matter as the solvent.
TRUE
500
What does it mean if a solution is saturated?
You have reached the point of solubility - you cannot absorb anymore into the solvent.
500
What is the difference between a colloid and a solution?
You can see different parts of a colloid under a microscope, but not a solution - it looks the same all the way through.
500
Josh's aquarium contains 50L of water. The fish need water with a concentration of 15% m/V in order to survive. How much salt does Josh need to add to the water?
1) 50L = 50,000 mL
2) 15/100 = x/50,000
3) Cross-multiply : 7,500g of salt!
500
Ms Benis has a 0.5 g/L solution with a volume of 800 mL. What will the solution be if she adds 1200 mL more water to it?