S8P1 and S8P2 Review - Fall 2022

Front

What is a solution?

Back

A solution is a homogeneous mixture where one substance (the solute) is dissolved in another (the solvent). Example: Saltwater.

Front

How do you balance the equation HgO --> ?

Back

The balanced equation is 2HgO --> 2Hg + O2.

Front

Is milk going sour a physical or chemical change?

Back

It is a chemical change because it results in a change in the substance's chemical composition.

Front

What is a physical property?

Back

A physical property is a characteristic of a substance that can be observed without changing its chemical composition, such as size, shape, density, and phase.

Front

What type of energy does a battery convert?

Back

A battery converts chemical energy to electrical energy.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Example: Ice melting.

Front

What is a chemical property?

Back

A chemical property is a characteristic that can only be observed during a chemical reaction, such as reactivity with acid.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

Front

What is an example of a chemical change?

Back

An example of a chemical change is rust forming on iron.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.