Substances and Mixtures
This type of matter has a uniform composition and includes elements and compounds.
What is a pure substance?
The substance that does the dissolving in a solution.
What is the solvent?
This scale measures how acidic or basic a solution is.
What is the pH scale?
The smallest unit of an element that still has the properties of that element.
What is an atom?
This snack is technically a heterogeneous mixture: marshmallows, chocolate, and graham crackers.
What are s’mores?
This type of mixture has visible different parts and is not evenly mixed.
What is a heterogeneous mixture?
The maximum amount of solute that can dissolve in a given amount of solvent at a certain temperature.
What is solubility?
A solution with a pH of 3 is considered this type of substance.
What is an acid?
When atoms share electrons, they form this type of bond.
What is a covalent bond?
This sport’s championship game is called the Super Bowl.
What is football?
This method separates a solid from a liquid using a filter.
What is filtration?
Increasing temperature usually (increases/decreases) the solubility of most solid solutes in liquids.
What is increases?
A solution with a pH of 11 is considered this type of substance.
What is a base?
The law that states matter cannot be created or destroyed in a chemical reaction.
What is the Law of Conservation of Mass?
If Takis are extremely sour and spicy, they would likely have a (high/low) pH.
What is low pH? (Acidic!)
Air is made of oxygen, nitrogen, and other gases evenly mixed together. This makes air a ________.
What is a homogeneous mixture (or solution)?
A solution that cannot dissolve any more solute at a given temperature.
What is a saturated solution?
When an acid reacts with a base, it forms water and this type of compound.
What is a salt?
(Bonus: What is a neutralization reaction?)
A change in matter that produces a new substance.
What is a chemical change?
This Disney movie features a girl who says “Let it go!”
What is Frozen?
Salt water is an example of a solution. Name the solute and the solvent.
What is salt (solute) and water (solvent)?
Name two ways to increase the rate at which sugar dissolves in water.
What is stirring, crushing it (increase surface area), or increasing temperature?
Litmus paper turns red in acids and this color in bases.
What is blue?
Energy transferred due to temperature differences is called this.
What is heat?
A student adds 10 g of salt to 100 mL of water at 25°C. Only 8 g dissolves.
Describe the type of solution and what happened to the extra salt.
What is a supersaturated solution? The extra 2 g remained undissolved because the solution reached its solubility limit.