A mixture is a combination of two or more substances. A new substance is not formed in a mixture. Fruit salad, soda, lemonade, mud, a jar of coins– these are all mixtures!
Compounds A mixture is different from a compound. Have you ever heard of H2O? It’s water! Water is a compound made of two hydrogen atoms and one oxygen atom.
A compound has molecules with atoms of different elements. Here are some common compounds: salt, sugar, water, and carbon dioxide. Compounds cannot be separated and you can’t see the individual elements each atom is made of.
A compound has molecules with atoms of different elements. Here are some common compounds: salt, sugar, water, and carbon dioxide. Compounds cannot be separated are each compounds. When you mix them together, you get a mixture.
Solutions
A solution is a special type of mixture. A solution is a mixture in which one substance dissolves in another substance. Solutions are homogeneous, meaning they look the
same throughout.
In a sugar and water solution, sugar dissolves in water. When a substance dissolves, it gets smaller and smaller until you can’t see it. Sugar is the solute, or substance that dissolves in another substance. Water is the solvent, the substance that something dissolves in.
Soda is fizzy because it is a solution that has a gas called carbon dioxide dissolved in liquid.
Physical Properties
In many mixtures, each substance maintains its physical properties. If you combine red grapes and green grapes in a bowl, the red grapes and green grapes still have their physical properties.
In a solution, ingredients’ physical properties can change. Sugar looks different on its own than when it is dissolved in a sugar-water solution.
Separating Mixtures
Mixtures can usually be easily separated into its individual ingredients. For examples, in a mixture of iron filings and pepper, you can use a magnet to attract the iron filings because iron is magnetic. You can separate a mixture of sand and water using a paper filter. Sand collects in the paper coffee filter while the water passes through. You can use a sieve to separate pebbles and sand.
Question 1
1.
Question 2
2.
Question 3
3.
Question 4
4.
Question 5
5.
Question 6
6.
Select ALL the ways each mixture can be separated. There are 6 total checkmarks.
Determine if each item on the left is a solution or not a solution.
solution
not a solution
Question 19
19.
Question 20
20.
Question 21
21.
Question 22
22.
Question 23
23.
Why do you think the recipe calls for sugar to be dissolved in hot water instead of cold water?
Which mixtures are solutions?
Shampoo and water
Nickels, pennies, and quarters
Sugar, powdered drink mix, and water
Gravel, sand, and water
Iron filings and sand
Which mixtures are NOT solutions?
Nickels, pennies, and quarters
Sugar, powdered drink mix, and water
Shampoo and water
Gravel, sand, and water
Iron filings and sand
Which mixtures can be easily separated with your fingers?
Gravel, sand, and water
Shampoo and water
Nickels, pennies, and quarters
Sugar, powdered drink mix, and water
Iron filings and sand
Which mixtures can be easily separated with a magnet?
Nickels, pennies, and quarters
Shampoo and water
Sugar, powdered drink mix, and water
Gravel, sand, and water
Iron filings and sand
Is fruit salad a mixture or a compound?
mixture
compound
neither
When you combine red grapes and green grapes into a mixture, do the physical properties of the ingredients change?
No
Yes
Sometimes
In a saltwater solution, what ingredient would be considered the solvent?
oxygen
container
salt
water
What tool can be used to separate a mixture of iron filings and pepper?
magnet
hot plate
paper filter
sieve
When you combine sugar and water, what special type of mixture forms?
solution
compound
mixture
Select only mixtures. Select THREE mixtures.
pure water
Legos
Chex Mix
Soda
Watermelon
fruit salad
A bag of M & M's
Is lemonade a mixture?
Yes
No
Maybe
Is lemonade a solution? How do you know?
Yes, because the solute, sugar, is being dissolved.
Yes, because all mixtures are solutions.
No, because all solutions are mixtures.
No, because the sugar and lemon juice gets evenly mixed.
A solvent is the substance that there is the most of in a solution. A solute is the substance that is dissolved in a solution.