Front

What are some common characteristics of most acids?

Back

Acids are substances that taste sour, can dissolve metals, and cause a burning feeling. They are also known to be very reactive.

Front

What happens during a chemical reaction?

Back

Matter is neither created nor destroyed during a chemical reaction.

Front

True or false: Adding sugar to lemonade does not change its weight.

Back

False, adding sugar increases the weight of the lemonade.

Front

What is a chemical reaction?

Back

A chemical reaction occurs when two or more substances are mixed together and result in a new substance.

Front

What are acids?

Back

Acids are a group of substances that are very reactive, taste sour, can dissolve metals, and cause a burning feeling.

Front

What is the pH scale?

Back

The pH scale measures how acidic or basic a substance is, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

Front

What is a base?

Back

A base is a substance that tastes bitter, feels slippery, and can accept protons or donate a pair of valence electrons.

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.

Front

What is an example of a common acid?

Back

Common acids include hydrochloric acid (HCl), sulfuric acid (H2SO4), and acetic acid (CH3COOH).

Front

What is an example of a common base?

Back

Common bases include sodium hydroxide (NaOH), potassium hydroxide (KOH), and calcium carbonate (CaCO3).