Question

You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture ?
(a) evaporation
(b) simple distillation
(c) fractional distillation
(d) crystallisation

Answer 1

Here, we will go for distillation because the alcohol will first evaporate and condense and will be collected in the collecting container while iodine will appear in the distillation flask.

Hope it helps .

Answer 2

Distillation is the method used to recover iodine and alcohol from tincture iodine.  

Explanation:  

• Tincture iodine is an antiseptic containing sodium iodide or potassium iodide, 2-7% elemental iodine, mixed in water and ethanol.
• The components of a mixture can be separated by using distillation method. When a mixture with two miscible liquids is boiled, the liquids are separated without decomposition.  
• In tincture iodine, alcohol is present in liquid form and iodine is present in solid form. Alcohol and iodine can be separated by simple distillation.
• It can be noted that their boiling points differences will be more than 25°C.