Chemical Reaction
Acids
Bases
Indicators
Chemical Reaction in the Environment
100

A process in which new substances are formed.

Chemical reaction

100

A substance that releases hydrogen ions (H⁺) in water.

Acids

100

What is the pH of a base?

Greater than 7

100

A common indicator of a chemical reaction.

Color change
100

It is a life process wherein carbon dioxide, water, and light are combined to form new products such as glucose and oxygen gas.

Photosynthesis

200

What happens to atoms during a chemical reaction?

They rearrange.
200

In what common household substances is acetic acid can be found? 

Vinegar

200

What color does red litmus paper turn in a base?

Blue

200

What does the appearance of bubbles usually indicate?

Gas is produced. 

200

Which type of chemical reaction wherein one compound breaks down into two products? 

Decomposition

300

What is the product from the reaction of metal to water?

Rust

300

What is PH level of an acid? 

Less than 7

300

A substance that produces hydroxide ions (OH⁻) in water or accepts hydrogen ions (H⁺).

Base

300

A solid that forms from a liquid during a chemical reaction.

Precipitate

300

Which environmental process or chemical reaction releases carbon dioxide into the atmosphere?

Combustion

400

What is the name of the product when sodium reacts with chlorine? 

Sodium chloride or table salt.

400

What color does blue litmus paper turn in an acid?

Red

400

What is the PH of neutral solutions? 

Seven (7)

400

Which indicator is easiest to observe in the reaction between vinegar and baking soda?

Bubbles
400

Which gas is needed for combustion?

Oxygen gas

500

What is the chemical formula of glucose? 

C6H12O6

500

Hydrochloric acid is commercially known as? 

Muriatic acid

500

What are the products of acid and base when combined together? 

Salt and water

500

Which indicator shows that energy is involved in a chemical reaction?

Temperature change or light production

500

What two substances are needed for iron to rust?

Oxygen and water

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