Question

Please help!!!!!!!!!!!!!!!!!!!!!1

Steve fills a jar with water and adds Epsom salts and ammonia. After five minutes, he observes that white particles have formed and settled at the bottom of the jar. Steve is unable to change these particles back to any of the three original substances by heating or stirring the solution. He isolates the white particles and finds that they have properties that are very different from any of the three starting materials. Which statement BEST explains Steve's observation?

Group of answer choices


A physical change occurred because no color change was observed.


A chemical change occurred because a new substance formed.


A physical change occurred because stirring did not change the solution.


A chemical change occurred because a solid substance formed.

Answer 1

It’s a chemical change that occurred because a new substance formed.

Even though not much seemed to change, the question mentioned that Steve is unable to reverse the substance, which means there was a chemical reaction. If he was able to reverse it by heating or stirring, this would be a physical change because those can be reverted back to its original property.

As he was not able to do so, this was a chemical change. A new substance was formed. I think there was also a precipitate involved because of what was produced at the bottom, which is also a chemical change.

Hope my explanation was clear!! :)

Answer 2

A physical change occurred because stirring did not change the solution is the right answer