Pure Sub and Mix Study Guide

Front

What is a substance with a pH of 3?

Back

An acid.

Front

What is the taste of acids and bases?

Back

Acids are sour and bases are bitter.

Front

Why is salt (NaCl) safe to eat despite sodium (Na) being explosive and chlorine (Cl) being poisonous?

Back

Compounds have different properties than the elements that make them up.

Front

What is a homogeneous mixture?

Back

A substance where you cannot see the individual parts.

Front

What is a mixture?

Back

A combination of two or more substances that retain their individual properties.

Front

What is a compound?

Back

A substance formed when two or more elements are chemically bonded together.

Front

What is the pH scale?

Back

A scale that measures how acidic or basic a substance is, ranging from 0 to 14.

Front

What is a solute?

Back

A substance that is dissolved in a solution.

Front

What is a solvent?

Back

A substance that dissolves a solute, forming a solution.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.