Q3 of 16 Page 57

Write the steps in deducing the chemical formulae of the following compounds.

Sodium sulphate

Sodium Sulphate-


Formula: Na2SO4


Steps to obtain the chemical formula:


Step 1: To write the symbols of the radicals. (Basic radical on the left.)


Na SO4


Step 2: To write the valency below the respective radical. Na SO4


1 2


Step 3: To cross-multiply as shown by the arrows the number of the radicals.



Step 4: To write down the chemical formula of the compound.


Na2SO4


More from this chapter

All 16 →
1

Give examples.

A. Positive radicals


B. Basic radicals


C. Composite radicals


D. Metals with variable valency


E. Bivalent acidic radicals


F. Trivalent basic radicals

 2

Write symbols of the following elements and the radicals obtained from them, and indicate the charge on the radicals.

Mercury, potassium, nitrogen, copper, sulphur, carbon, chlorine, oxygen

 3

Write the steps in deducing the chemical formulae of the following compounds.

potassium nitrate

 3

Write the steps in deducing the chemical formulae of the following compounds.

Ferric phosphate