Question
An alcoholic iodine solution (“tincture” of iodine) is prepared by dissolving 5.15 g of iodine crystals in enough alcohol to make a volume of 225 mL. Calculate the molarity of iodine in the solution.
Step 1
The molar mass of iodine is approximately 253.8 g/mol. We can use the formula: \[ moles = \frac{mass}{molar \, mass} \] Substituting the given values: \[ moles = \frac{5.15 \, g}{253.8 \, g/mol} \approx 0.020 \, moles \] Show more…
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