Roasting galena [lead(II) sulfide] is an early step in the

Problem 52P

Roasting galena [lead(II) sulfide] is an early step in the industrial isolation of lead. How many liters of sulfur dioxide, measured at STP, are produced by the reaction of 3.75 kg of galena with 228 L of oxygen gas at 220°C and 2.0 atm? Lead(II) oxide also forms.

Solution 52P:

Here, we are going to calculate the volume of SO2 which is produced by the reaction of galena with oxygen.

Step 1:

Calculation of the mol of PbS(s).

The balanced equation of the reaction is

Given that

The mass of PbS = 3.75 kg = 3.73

The molar mass of Pbs=239.3 g/mol

Thus, the mol of PbS = (3.73 PbS) = 15.587 mol PbS