Element, Compound, Homogeneous Mixture, Heterogeneous Mixture?
Water
Water is a compound
H2O
What is a pure substance made from only one type of atom called?
Element
What pH values are expected for a substance that is acidic?
pH values less than 7
Lemon juice has a pH around 2 and orange juice has a pH around 4.
Which is the stronger acid?
Lemon juice (pH = 2) is a stronger acid than orange juice (pH = 4)
Classify carbon dioxide as an element, compound, homogeneous mixture, or heterogeneous mixture
carbon dioxide is a compound
Chocolate Chip Cookie Dough
Chocolate chip cookie dough is a Heterogeneous Mixture
Combination of 2 or more substances that are not chemically combined
What is a Mixture?
What taste do acids and bases have?
Acids = sour taste
Bases = bitter taste
Any substance with a pH greater than 7 is a _______
Base
Pizza is an example of what type of mixture?
Pizza is a heterogeneous mixture.
Oxygen
Oxygen is an element
What is a compound?
A compound is a pure substance made from 2 or more different elements that are chemically combined.
Name a property that both acids and bases have in common.
Strong Acids and bases can be corrosive.
Define Heterogeneous Mixtures
Heterogeneous Mixtures are not evenly mixed. You can see the different parts of the mixture.
True/False
Mixtures can be separated through physical means (evaporation, filtration, etc.)
True
Salt Water
Salt Water is a Homogeneous Mixture
Define a Homogeneous Mixture
A Homogeneous Mixture is a mixture in which the substances are evenly distributed.
(Examples: Air, Sugar Water)
Name 2 examples of pH indicators (substances that take on different colors in the presence of an acid or base).
Red and blue litmus paper is a pH indicator
Red cabbage juice is a pH indicator
When classifying matter, what are the 2 pure substances called?
elements and compounds are pure substances
What is the pH of a neutral solution?
pH of 7 = neutral solution
Mouthwash
Mouthwash is a Homogeneous Mixture
What is matter?
Matter is anything that has mass and takes up space.
What is neutralization?
Neutralization is a chemical process that changes the pH of a solution to neutral 7.
Adding an acid and base of equal strength will neutralize a solution.
What is a molecule?
2 or more atoms bonded together
True/False
Many bases are used in cleaning products.
True