Question

1. Explain briefly formation of sodium chloride molecules
2. Write the balanced chemical equation for the following.
A. Zinc + silver nitrate
B. Barium chloride + potassium sulphate
A shiny brown coloured element 'X' on heating in air become black in colour name the element " X' and the black coloured compound formed.

Answer 1

Sodium chloride is formed whensodium atoms interact with chlorineatoms. When this occurs, sodium will donate an electron (which is a negatively-charged particle) tochlorine. This makes sodium slightly positive and chlorine slightly negative. ... So then, sodium ions will attractchloride ions and form an ionic bond .

A . Zn + AgNo3 -------- Zn(No3)2 +Ag
B. BaCl2 + k2So4 -------- BaSo4 + kCl
the X element is copper and the black coloured compound is copper oxide.


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