Answer to Question #62748 in General Chemistry for John

Question

According to the following reaction, how many grams of bromine monochloride will be formed upon the complete reaction of 26.6 grams of chlorine gas with excess bromine?

Answer 1

The equation for this reaction is:
Br2 + Cl2 → 2BrCl
The number of moles of chlorine gas equals:
ν(Cl2) = m(Cl2)/Mr(Cl2) = 26.6 g / (2×35.5 g mol-1) = 0.3746 mol
According to the equation the amount of formed BrCl is in two times more than that for Cl2.
Thus, ν(BrCl) = 2ν(Cl2) = 0.7493 mol
And its mass is:
m(BrCl) = ν(BrCl)×Mr(BrCl) = 0.7493 mol × 115 g mol-1 = 86.17 g