Question

SCIENCE FOR NINTH CLASS : CHEMISTR
Ion
1-
1+
1-
1+
Answer Type Questions
- () What is an ion ? How is an ion formed ? Explain with the help of two examples of different ions.
(b) The valencies (or charges) of some of the ions are given below:
lon
Valency
Valency
(Charge)
(Charge)
Sodium ion
Bromide ion
Ammonium ion
Hydroxide ion
Calcium ion
Sulphate ion
2-
Lead ion
2+
Phosphate ion 3-
Using this information, write down the formulae of the following compounds:
(1) Sodium phosphate
(ii) Ammonium sulphate
(iii) Calcium hydroxide
(iv) Lead bromide
ween a nation and an anion ? Explain with examples.
2+
batean​

Answer 1

Explanation:

According to Werners theory each coordinate complex compound exhibits two types of valencies.The are a) primary valency and b) secondary valency. Primary valencies are satisfied by only negative charge and it is equal to oxidation state of central metal ion.

Secondary valencies are satisfied by either negative charge or neutral species and it is equal to the coordinate number. Primary valencies are denoted by dotted lines and ionisible. Secondary valenices are denoted by dark or straight lines and non ionisible.