When dissolved in water, which one or more of the following compounds gives rise to a basic solution? A)calcium hydroxide, Ca(OH)₂ B)washing soda, Na₂CO₃ C)methanol, CH₃OH D)copper sulfate, CuSO₄ E)Both A and B

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Calcium hydroxide (Ca(OH)2) is a strong base and dissociates in water to produce hydroxide ions (OH-), making the solution basic. Washing soda (Na2CO3) is a salt of a strong base (NaOH) and a weak acid (H2CO3), and it hydrolyzes in water to produce hydroxide ions, also resulting in a basic solution. Methanol and copper sulfate do not produce basic solutions when dissolved in water.

When Dissolved in Water, Which One or More of the Following