Answer : The limiting reagent is, potassium
Explanation : Given,
Mass of potassium = 155 g
Mass of potassium nitrate = 122 g
Molar mass of potassium = 39 g/mole
Molar mass of potassium nitrate = 101 g/mole
First we have to calculate the moles of and .
Now we have to calculate the limiting and excess reagent.
The balanced chemical reaction is,
From the balanced reaction we conclude that
As, 2 moles of react with 10 mole of
So, 1.21 moles of react with moles of
That means, in the given balanced reaction, is a limiting reagent because it limits the formation of products and is an excess reagent.
Hence, the potassium is the limiting reagent.