What is Brine? How we get common salt present underground.

What is Brine? How we get common salt present underground.

Brine: Solution of NaCl is called Brine.

Ø Common salt is obtained from the ground by pumping out in the form of Brine (salt solution).

Ø Hot water is pumped down the outer pipe. It dissolves the salt. The salt solution is then forced up the smaller inner pipe by the pressure of water.

Ø The brine gets stored in lakes until it is needed. It is then pumped straight to the chemical plant.

Brine (salt solution)

The second way that we can get salt from the ground is solution mining.

This method relies on salt dissolving in water.

Look at the diagram below:

Brine chemical plant

It dissolves the salt. The salt solution is then forced up the smaller, inner pipe by the pressure of water.

The salt solution is called brine.

The brine gets stored in lakes until it is needed.

It is then pumped straight to the chemical plant.

The holes left under the ground must be filled.

If not the land above con collapse and slide into the old mines. This is coiled subsidence.

Look at the old photograph:

Subsidence used to be more of a problem in Cheshire. Nowadays the holes are more carefully spaced out.

Class Assessment

 

1.   Solution of NaCl is called ----------------.

A.  Salt

B. Brine

C. Base  

 

2.   Common -------------- is obtained from the ground by pumping out in the form of Brine.

A.  Salt

B.  Acid

C. Base  

 

3.   Common salt formula is -------------.

A.  Na

B.  Cl

C. NaCl  

 

4.   The second way that we can get salt from the ground is---------------------.

A.  sea-water  

B. solution mining

C. Precipitation

 

5.   The salt is found about ------------------- below ground.

A.  200 m 

B. 300 m

C. 400 m

1.   Hot water is pumped down the outer pipe.

A. True

B.  False

2.   The salt solution is then forced up the smaller inner pipe by the pressure of water.

A. True

B.  False

3.   Subsidence used to be more of a problem in Cheshire.

A. True

B.  False

4.   The holes left under the ground must be unfilled.

A.  True

B. False