Question

Your teacher is performing an experiment in the lab. She takes a test tube

with a clear liquid inside and pours it into another test tube with some sort
of solid. As she pours the liquid, it immediately starts to bubble up, but no color
change occurs. How do we know that a chemical reaction has occurred?

a. bubbles formed

b. the liquid was poured into the solid

c. the liquid mixed with the solid

d. no color change occurred

Answer 1

a. bubbles formed

Step-by-step explanation:

Bubbles are a sign of gaseous molecules escaping, meaning that something has forced molecules to break apart and escape. A chemical reaction involves any change that directly impacts the molecular formation of a substance.