Density
What two measurements do you need to calculate density?
Mass and volume
What is mass?
The amount of matter in an object
In salt water, which substance is the solute?
Salt
What does concentration tell us?
The amount of solute in a solution
Why can iron be separated from an iron and sulfur mixture using a magnet?
The substances keep their own properties
An object has a large mass but a small volume. Would you expect its density to be high or low?
High
What is volume?
The amount of space an object takes up
In salt water, which substance is the solvent?
Water
If more solute is added to the same amount of water, what happens to concentration?
It increases
What is the main difference between a mixture and a compound?
Mixtures are not chemically joined; compounds are
Object A and Object B have the same volume. Object A has more mass. Which object is more dense?
Object A
Two objects have the same mass. Object A has a smaller volume. Which is more dense?
Object A
A student adds sugar to water until no more sugar dissolves. What is the solution called?
Saturated
Which is more concentrated: 10 g in 1 L or 20 g in 1 L?
20 g in 1 L
A solution contains lots of solute compared with its volume. Would it have a high or low concentration?
High concentration
An object has a mass of 120 g and a volume of 40 mL. Calculate its density.
3 g/mL
A liquid has a mass of 200 g and a volume of 100 mL. Calculate its density.
2 g/mL
A student dissolves 30 g of salt in 0.5 L of water. Calculate the concentration.
60 g/L
25 g of solute is dissolved in 0.5 L of solution. Calculate the concentration.
50 g/L
Object A: 100 g ÷ 50 mL. Object B: 180 g ÷ 60 mL. Calculate both densities. Which is denser?
A = 2 g/mL, B = 3 g/mL. Object B
A metal block has a mass of 450 g and a volume of 150 mL. Calculate its density.
3 g/mL
A rock has a mass of 360 g and a volume of 120 mL. A second rock has a mass of 240 g and a volume of 60 mL. Which rock is more dense?
Rock 2: 4 g/mL vs Rock 1: 3 g/mL
Solution A has 40 g in 1 L. Solution B has 30 g in 0.5 L. Calculate both. Which is more concentrated?
A = 40 g/L, B = 60 g/L. Solution B
75 g of solute is dissolved in 1.5 L of solution. Calculate the concentration.
50 g/L
Solution A: 60 g ÷ 2 L. Solution B: 50 g ÷ 1 L. Calculate both concentrations. Which is more concentrated and by how much?
A = 30 g/L, B = 50 g/L. B is 20 g/L more concentrated