Answer :
Final answer:
The molarity of the solution is 0.307 M.
Explanation:
To find the molarity of the solution, we need to first convert grams of the solute, potassium iodide, to moles. The molarity (M) is calculated by taking the moles of solute and dividing it by the volume of the solution in liters.
Step 1: Calculate moles of potassium iodide (KI)
First, calculate the molar mass of KI: K (39.10 g/mol) + I (126.90 g/mol) = 166 g/mol
Next, divide the mass of KI by its molar mass:
38.6 g / 166 g/mol = 0.232 moles of KI
Step 2: Calculate molarity (M)
Molarity (M) = moles of solute / volume of solution in liters
Given: volume = 755 mL = 0.755 L
Molarity = 0.232 moles / 0.755 L = 0.307 M
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