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Multiple Choice
According to the reaction 2 LiOH + FeCl2 → 2 LiCl + Fe(OH)2, how many moles of Fe(OH)2 can be formed from 175.0 mL of 0.227 M LiOH solution?
A
0.0397 moles
B
0.113 moles
C
0.0794 moles
D
0.227 moles
Verified step by step guidance
1
Identify the balanced chemical equation: 2 LiOH + FeCl2 → 2 LiCl + Fe(OH)2. This tells us that 2 moles of LiOH react with 1 mole of FeCl2 to produce 1 mole of Fe(OH)2.
Calculate the number of moles of LiOH in the solution. Use the formula: \( \text{moles of LiOH} = \text{Molarity} \times \text{Volume in Liters} \). Convert 175.0 mL to liters by dividing by 1000.
Determine the stoichiometric relationship between LiOH and Fe(OH)2 from the balanced equation. According to the equation, 2 moles of LiOH produce 1 mole of Fe(OH)2.
Use the stoichiometric ratio to calculate the moles of Fe(OH)2 that can be formed. Divide the moles of LiOH by 2 to find the moles of Fe(OH)2, since the ratio is 2:1.
Review the possible answers and compare them with your calculated moles of Fe(OH)2 to identify the correct answer.