Turn on thread page Beta
 You are Here: Home

# Calculations Involving Masses and Moles watch

1. Need help with this question please.

Sulfur dixoide is a pollutant formed in the burning of coal. It can be removed from the flue gases of a furnace by reacting it with calcium carbonate in air, according to the following equation:

2CaCO3 + 2SO2 + O2 --> 2CaSO4 + 2CO2

What mass of sulfur dioxide will be removed by 10.0kg of calcium carbonate?
2. Step-by-step:

Deduce the reaction ratio of calcium carbonate : SO2 from the equation.

Calculate the number of moles of calcium carbonate in 10.0kg

Deduce the number of moles of SO2 removed by that calcium carbonate.

Calculate the mass of that number of moles of SO2
3. (Original post by TutorsChemistry)
Step-by-step:

Deduce the reaction ratio of calcium carbonate : SO2 from the equation.

Calculate the number of moles of calcium carbonate in 10.0kg

Deduce the number of moles of SO2 removed by that calcium carbonate.

Calculate the mass of that number of moles of SO2
Can anyone carry out these steps for me? Im really bad at these questions.
4. (Original post by w0w1233334)
Can anyone carry out these steps for me? Im really bad at these questions.
Try the first step. what ratio do CaCO3 : SO2 do you see from the balanced equation?
5. Here's a step by step solution.

1. Use mass = mr x mole to find the moles of calcium carbonate in 10kg (remember mass is measured in grams for the equation)

moles = mass/mr
Ar of Ca = 40.1
Ar of C = 12
Ar or O = 16
So Mr of CaCO3 = 40.1 + 12 + 16x3 = 100.1
moles = 10000/100.1 = 99.9

2. Calculate moles of SO2 using mole ratio
The moles of SO2 and moles of CaCO3 is a 1:1 ratio, so moles of CaCO3 = moles of SO2 = 99.9

3. Using mass = mr x moles, calculate the mass of SO2 that reacts
Ar of S = 32.1
Ar of O = 16
Mr of SO2 = 32.1 + 16x2 = 64.1
mass = mr x moles
mass = 64.1 x 99.9 = 6403.59 grams
= 6.40 KG

I recommend doing a few more examples to make sure you understand the method. You'll learn nothing by copying solutions off this forum.

Turn on thread page Beta

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: October 16, 2017
Today on TSR

### Results day under a month away

How are you feeling?

### My Uni place has been confirmed in track?

Poll

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE