Question

pleaseeee helppp
Two chemicals at room temperature (about 22°C) were combined in a flask. At first, there were bubbles, then, white flakes appeared at the bottom of the flask. After five minutes, the temperature of the solution was 36°C. A portion of the solution was used to measure its density and boiling point, which were determined to be 4.5 g/L and 82°C, respectively.
Did a physical or chemical change occur?
How do you know it is not the other kind of change? Provide at least three points of evidence that support your claim.

Answer 1

Answer:

a pyshical change occured

Explanation:

sorry if wrong

Answer 2

Answer:

When the two chemicals were combined in the flask a chemical change occurred. It was not a physical change because a physical change is when you change the state of a pure substance and turn it into a solid, liquid, or gas. For example, melting ice would be a physical change because you're turning the ice back to its original form without having any major chemical reactions. In this case, when the chemicals were combined bubbles were formed then white flakes appeared at the bottom which indicates a chemical change occurred. There was also an increase in the temperature of the solution which indicates there was a chemical change.