Question: What happens when I dissolve $2 g$ of anhydrous copper sulfate (CuSO4) in $100 \mathrm{~mL}$ of water (please mention why the solution turns blue and why the temperature of the solution...

What happens when I dissolve $2 \mathrm{~g}$ of anhydrous copper sulfate (CuSO4) in $100 \mathrm{~mL}$ of water (please mention why the solution turns blue and why the temperature of the solution increases after adding anhydrous copper sulfate).

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Question: What happens when I dissolve $2 g$ of anhydrous copper sulfate (CuSO4) in $100 \mathrm{~mL}$ of water (please mention why the solution turns blue and why the temperature of the solution...

What happens when I dissolve $2 \mathrm{~g}$ of anhydrous copper sulfate (CuSO4) in $100 \mathrm{~mL}$ of water (please mention why the solution turns blue and why the temperature of the solution increases after adding anhydrous copper sulfate).

Accepted Answer

∻Solution∻ ‖ 1 ⋮ **Identify the phenomena**: When anhydrous copper sulfate ($ ext{CuSO}_4$) is dissolved in water, two main phenomena are observed: the solution turns blue, and the temperature increases. ‖ ‖ 2 ⋮ **Explain the color change**: The anhydrous copper sulfate is white because it lacks water of hydration. When it dissolves in water, it forms a hydrated copper sulfate complex, $ ext{CuSO}_4 \cdot 5 ext{H}_2 ext{O}$, which is blue due to the presence of $ ext{Cu}^{2+}$ ions surrounded by water molecules in a specific arrangement that causes d-d electron transitions, absorbing some wavelengths of light and reflecting others, which we perceive as the color blue. ‖ ‖ 3 ⋮ **Explain the temperature increase**: The process of dissolving anhydrous copper sulfate is exothermic. When the ionic solid dissolves, the lattice energy of the solid is overcome, and the hydration energy of the ions is released. The hydration energy, in this case, is greater than the lattice energy, resulting in a net release of energy as heat, which increases the temperature of the solution. ‖ ∻1 Answer∻ ⚹ When $2 \mathrm{~g}$ of anhydrous copper sulfate ($ ext{CuSO}_4$) is dissolved in $100 \mathrm{~mL}$ of water, the solution turns blue due to the formation of a hydrated copper sulfate complex, and the temperature increases because the dissolution process is exothermic. ⚹ ∻Key Concept∻ ⚹ Color change upon hydration and exothermic dissolution ⚹ ∻Explanation∻ ⚹ The color change is due to the formation of a hydrated complex with $ ext{Cu}^{2+}$ ions, and the temperature increase is due to the exothermic release of energy when the ionic solid dissolves and the ions are hydrated. ⚹◊What is the chemical equation for the dissolution of anhydrous copper sulfate in water?⍭ Generate me a similar question◊

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