25. compare the compositions of binary ionic and binary molecular compounds. 26. write the general chemical formula for an acid, and discuss what each component of the formula represents.

Explanation:

25. Binary ionic compounds: They are known as the compounds which contains a cation formed from a metal and an anion formed from a non-metal or a polyatomic anion. For example : Barium sulfate

Ba : +2 ( metal of group II-A)

: -2 ( sulfate)

These two ions combine to form a binary ionic compound having formula

Binary Molecular compounds: They are known as the compounds which contain two or more non-metals that are bonded covalently. In these compounds, no ions are present because the electrons are shared by the atoms. Examples are: : phosphorous trichloride

: sulfur dioxide

26. The general chemical formula for an acid is HX where H is the hydrogen and X is the non-metal or polyatomic ions. Examples of acids are:

HF : Hydrofluoric acid

: Sulfuric acid

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