In the table below, record your observations before and after the interactions and note if the mass was conserved.

Describe the changes in properties that prove a chemical reaction occurred. The first row is an example


Example: Sugar + Heat
Observations Before Interaction- The sugar is in tiny white particles in a pile. Heat is not seen but is implied by the heat source. The pile of sugar in the pot has a mass of 100 grams.
Observations After Interaction- There is a solid, light brown mass at the bottom of the pot. It has a mass of 100 grams.
How was mass conserved- The mass of the sugar is the same in melted form as it is in solid crystal form.
Proof of a Chemical Reaction- There was not a chemical reaction. Sugar did not change the composition. It only melted. Melting point is a physical property, and this is a physical change.


For Zinc + Hydrogen Chloride and Sodium Hydroxide + Copper Sulfate, I just need "Proof of a Chemical Reaction"