Limestone and it's uses

Question 1

What is limestone mainly made out of?

Answer 1

Calcium carbonate

Question 2

What is the chemical formula for calcium carbonate?

Answer 2

CaCO3

Question 3

How do you make cement?

Answer 3

Heat powdered limestone and powdered clay

Question 4

How do you make concrete?

Answer 4

Mix cement powder with sand and aggregate

Question 5

What is CaCO3 made up of?

Answer 5

Two calcium ions and carbonate ions

Question 6

What does the 2+ and 2- charges tell us?

Answer 6

There is the same number of calcium ions and carbonate ions in CaCO3.

Question 7

What is thermal composition?

Answer 7

Breaking down a chemical by heating

Question 8

What happens when we heat limestone strongly?

Answer 8

The CaCO3 breaks down to form calcium oxide.

Question 9

What is the Limestone thermal decomposition word equation?

Answer 9

Calcium Carbonate (heated) —-> Calcium Oxide + Carbon dioxide

Question 10

How can we make lots of Calcium oxide

Answer 10

A rotary lime kiln

Question 11

Describe the process of a rotary lime kiln.

Answer 11

1. Fill with crushed limestone and heat.
2. Calcium oxide comes out of the bottom of the kiln.
3. Calcium dioxide is also produced as a waste gas.

(Thermal decomposition)

Question 12

What happens when calcium carbonate reacts with acid?

Answer 12

Calcium carbonate (CaCO3) reacts with Sulfuric acid (H2SO4) and produces calcium sulfate (CaSO4) and Carbon dioxide (CO2) and water (H2O).

Question 13

With the limewater test how do we know the there is CO2?

Answer 13

It will turn cloudy.