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Sodium sulfate is soluble in water. Hydrochloric acid is a water solution of HCl. Solubility is considered a physical property.
Color is ALLWAYS a physical phenomenon (property) chemical composition of the compound does not change by 'having' a color whatsoever
Sodium sulfate anhydrous can absorb water.
We can not answer this as we were not there to observe the experiment. Only YOU can answer this!
Dissolving is a physical process.
it is a chemical change Sodium carbonate + Copper sulfate react to make Sodium sulfate + Copper carbonate
Physical
This is a homogeneous solution.
Sodium sulfate is a solid.
Sodium sulfate solution is neutral; the red litmus is purple.
Copper sulfate is a substance, not a change. It can undergo physical and chemical changes.
chemical