Question

hester, treyvon dtal- ch- term 1 - unit 4a assessment- 25-26 a solid substance was tested in the laboratory. the test results are listed below: dissolves in water is an electrolyte melts at a high temperature based on these results, the solid substance could be cu c cubr₂ c₆h₁₂o₆

Explanation:

Step1: Analyze properties of substances

We know that a substance that dissolves in water and is an electrolyte is likely an ionic - compound. Ionic compounds also generally have high melting points.

Step2: Evaluate each option

• Cu is a metal. Metals are good conductors in the solid state but are not electrolytes in the traditional sense when dissolved in water and do not dissolve in water like an ionic compound.
• C (carbon) in its common forms (diamond, graphite) does not dissolve in water and is not an electrolyte.
• CuBr₂ is an ionic compound. It dissociates into Cu²⁺ and Br⁻ ions when dissolved in water, making it an electrolyte. Ionic compounds also have high melting points.
• C₆H₁₂O₆ (glucose) is a covalent compound. It dissolves in water but does not dissociate into ions, so it is a non - electrolyte.

Answer:

CuBr₂