Types Of Water

Question 0

What are the two types of hardness?

Answer 0

Permanent and temporary hardness

Question 1

What are the two types of water?

Answer 1

Hard and soft water

Question 2

What makes hard water hard?

Answer 2

Dissolved calcium and magnesium ions

Question 3

What forms when hard water reacts with soap?

Answer 3

Scum

Question 4

Is scum soluble or insoluble?

Answer 4

Insoluble

Question 5

What does hard water form when heated?

Answer 5

Scale

Question 6

What does scale do to the efficiency of heating appliances?

Answer 6

Reduce the efficiency

Question 7

Is scale a conductor or insulator of heat?

Answer 7

Insulator

Question 8

What is hard water good for?

Answer 8

Healthy teeth and bones, less risk of developing heart disease

Question 9

What is temporary hardness caused by?

Answer 9

Calcium Hydrocarbonate

Question 10

How do you remove temporary hardness?

Answer 10

Boiling

Question 11

What does calcium hydrogencarbonate decompose to form?

Answer 11

Calcium carbonate, water and carbon dioxide

Question 12

Why won’t boiling remove hardness from permanently hard water?

Answer 12

Heating a sulfate ion doesn’t do anything

Question 13

How can both types of hardness be removed?

Answer 13

Adding washing soda or running water through ion exchange columns

Question 14

What does soft water react with soap to form?

Answer 14

A nice lather

Question 15

Why is hard water more expensive?

Answer 15

Takes longer to boil water
Need more soap for a nice lather
Replace pipes more often