In 1901, Thomas Edison invented the nickel-iron battery. The follwing reaction takes place in the battery.

Fe(s) + 2 NiO(OH)(s) + 2 H2O(l) Fe(OH)2(s) + 2 Ni(OH)2(aq)

How many mole of Fe(OH)2, is produced when 3.60 mol Fe and 8.20 mol NiO(OH) react?

The number of moles of  produced are, 3.60 moles.

Explanation :

First we have to calculate the limiting and excess reagent.

The balanced chemical equation is:

From the balanced reaction we conclude that

As, 1 mole of react with 2 mole of

So, 3.60 moles of react with moles of

From this we conclude that, is an excess reagent because the given moles are greater than the required moles and is a limiting reagent and it limits the formation of product.

Now we have to calculate the moles of

From the reaction, we conclude that

As, 1  mole of react to give 1 mole of

So, 3.60 mole of react to give 3.60 mole of

Therefore, the number of moles of  produced are, 3.60 moles.

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