Moles of HBr need to react = 5 moles
As the molar ratio is 1 is to 2 among them
Moles=molarity x volume
5=2.25 x volume
volume=2.22 litres of HBr required for this reaction
ANSWER IS 2.22 LITRES
Explanation: To calculate the moles, we use the equation:
Mass of calcium given = 100 g
Molar mass of calcium = 40 g/mol
Putting values in above equation, we get:
For the given reaction:
By Stoichiometry of the reaction,
1 mole of calcium reacts 2 moles of hydrogen bromide
So, 2.5 moles of calcium will react with = of hydrogen bromide.
Molarity is defined as the number of moles of solute dissolved per liter of solution.
Formula used :
n = moles of solute = 5 moles
= volume of solution in liter = ?
Therefore, the volume of solution in Liters is 2.22.
100 g Ca (1 mol Ca / 40 g Ca) (2 mol HBr / 1 mol Ca) (1 L HBr / 2.25 mol HBr)
= 2.22 L HBr
It would require 2.22 L of HBr to react completely 100 g of Ca.