Question

classify as physical or chemical change a addition of sodium to water​

Answer 1

Answer:

Addition of sodium chloride to water is considered a physical change because it does not form any new substance. but when the addition of dilute sulphuric acid is added to zinc. They forms zinc-sulphate hence it is considered as a chemical change.

Explanation:

It is physical change

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Answer 2

$\mathfrak{\bf{\underline{\underline{Answer \ :Chemical \: Change}}}}$

Dissolving salt in water is a chemical change. The reactant (sodium chloride, or NaCl) is different from the products (sodium cation and chlorine anion).

In contrast, dissolving a covalent compound like sugar does not result in a chemical reaction.