Which of the following acts as solvent in ‘tincture of iodine’ solution?
Answer & explanation
Correct answer: option 3
The correct answer is option 2. Alcohol.
Out of the choices you listed, the solvent in a tincture of iodine solution is: Alcohol
Tincture of iodine is a solution made by dissolving iodine crystals in a mixture of alcohol and water. The alcohol acts as the primary solvent, while water helps dissolve some potassium iodide or sodium iodide (often added to improve solubility).
Here's a breakdown of the components:
Solute: Iodine \((I_2)\)
Solvent: Alcohol (usually ethanol)
Solubilizing agent (optional): Potassium iodide \((KI)\) or sodium iodide \((NaI)\)
Iodine itself is not very soluble in water. The alcohol provides a medium for the iodine to dissolve and distribute throughout the solution. The optional potassium iodide or sodium iodide can help improve the solubility of iodine in the alcohol-water mixture.