Consider this reaction:FeCl2 + 2NaOH Fe(OH)2(s) + 2NaClIf 6 moles of FeCl2 are added to 6 moles of NaOH, how many moles of NaOH will be used up in the reaction?A.1B.3C.6D.2SUBMITarrow_backPREVIOUS
Question
Consider this reaction:FeCl2 + 2NaOH Fe(OH)2(s) + 2NaClIf 6 moles of FeCl2 are added to 6 moles of NaOH, how many moles of NaOH will be used up in the reaction?A.1B.3C.6D.2SUBMITarrow_backPREVIOUS
Solution 1
The balanced chemical equation shows that 2 moles of NaOH react with 1 mole of FeCl2. Therefore, if you have 6 moles of each, all 6 moles of FeCl2 will react, but they will only use up 3 moles of NaOH (because 2 moles of NaOH react with 1 mole of FeCl2, so 6 moles of FeCl2 will react with 3 moles of NaOH). Therefore, the answer is B.3.
Solution 2
The balanced chemical equation shows that 2 moles of NaOH react with 1 mole of FeCl2. Therefore, if you have 6 moles of each, all 6 moles of FeCl2 will react, but they will consume only 2*6 = 12 moles of NaOH. However, since you only have 6 moles of NaOH, all 6 moles will be used up in the reaction. So, the answer is C.6.
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