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?
A
Neither substance smelled or looked different after she combined them.

B
Both substances turned litmus paper blue before and after she combined them.

C
There was no change in pH after she combined the substances.

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

Answer 1

Answer:

Sika combines two substances and determines that a chemical change has taken place.

the evidence are

. C. is correct answer

There was no change in pH after she combined the substances.

Answer 2

Answer:

D

Explanation:

The pH was closer to neutral after she combined the substances. The other answer is wrong I just put it in and got it wrong. D is RIGHT