arellanohazel36
contestada

An experiment is performed in which a crystalline substance is added to a beaker filled with room temperature water. The following observations are made:
I. The crystals dissolve
II. A precipitate is formed.
III. The bottom of the beaker feels warm to the touch.
IV. Bubbles begin forming within the water. All of the observations are evidence of a chemical change EXCEPT -
A.observation I
B.observation II.
C.observation III.
D.observation IV.

Respuesta :

lolpopki98
A i think....don't take my word for it ompletely
jayilych4real

The observation which is not an evidence of a chemical change is:

  • A. observation I which states that the crystals dissolve

A chemical change is a reaction which involves a mixture or synthesis between two chemical substances which is irreversible.

As a result of this, when a crystalline substance is added to a beaker at room temperature, then the crystals dissolving is not a chemical change because it is not an evidence that there is a chemical reaction.

Therefore, the correct answer is option A

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