Identifying Chemical Reactions Flashcard

Front

Which of the following is a physical property that can be used to identify a substance? Options: Flammability, Color, Reactivity with acid, Ability to rust

Back

Color

Front

Term for a substance present at the start of a chemical reaction.

Back

Reactant

Front

What is evidence that a chemical reaction has occurred?

Back

Formation of a gas

Front

Property most useful for distinguishing between salt and sugar?

Back

Melting point

Front

A student mixes two clear liquids and observes the formation of a solid. What type of change has most likely occurred?

Back

Chemical change

Front

Why does iron rust when left outside in the rain?

Back

Iron reacts with oxygen and water to form a new substance.

Front

A student observes that when vinegar is added to baking soda, bubbles form and the temperature drops. Which evidence supports that a chemical reaction has occurred?

Back

Bubbles are produced.

Front

How can tests of solubility in water, melting point, and reaction with vinegar help identify if a chemical reaction occurs?

Back

By looking for bubbling or fizzing when vinegar is added

Front

A student records the mass of a steel wool pad before and after it rusts. The mass increases after rusting. What does this data suggest about the chemical reaction?

Back

The steel wool absorbed oxygen from the air, forming a new substance.

Front

Back

A chemical reaction occurred, producing a new substance and releasing energy.