Types of salts

Question 1

Hydrated Vs Anhydrous. What are hydrated salts?

Answer 1

Some salts posess water of crystallization as part of their structure. They are loosely bounded water molecules that contribute to large well defined sharp crystals,

Question 2

What happens when you heat Hydrated salts

Answer 2

They can lose their water of crystallization as a condensate will be seen on the sides of the test tube

Question 3

How can hyrdated vs Anydrous salts be tested

Answer 3

with blue cobalt chloride paper which turns pink when water is added

Question 4

Give an example of a hydrated salt

Answer 4

eg. Copper Sulphate Pentahydrate or CuSO4 . 5H20 (5 water of crystallization), it is a large blue well defined, sharp crystal.
It turns into a white powder which is the anhydrous form

Question 5

What is a normal salt

Answer 5

A salt in which all the hydrogen ions from the acid has been completely replaced by a metal or ammonium ion
A normal salt should have a pH close to 7 when dissolved in water

Question 6

What is an acid salt

Answer 6

An acid salt will use less base and will not use all H+ ions for eg. H2SO4 and H3PO4 are acids that can produce and acid salt

Question 7

How can you test to see if one is an acid salt and the other a normal salt

Answer 7

Add 5cm^3 of each salt to two separate test tubes and 2 drops of universal indicator and match the colour of the pH, the lower pH is the acid salt

Question 8

How can you test to see if one is an acid salt and the other a normal salt

Answer 8

Add 5cm^3 of each salt to two separate test tubes and 2 drops of universal indicator and match the colour of the pH, the lower pH is the acid salt