Question

In the science lab, Sika combines two substances and determines that a chemical change has taken place. What evidence might she have based this on?

Answer 1

Answer:

evidence might be:

1. evolution of gas

2. change in temperature

3. change in colour

4. formation of precipitate

Explanation:

hope this helps you

Answer 2

Answer:

The pH was closer to neutral after she combined the substances.

Explanation: