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Chemical Reactions

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Question

write a chemical formula of a compound using zinc ion and phosphate ion.

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Solution

The compound is zinc phosphate having formula Zn₃(PO₄)₂.

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Q. Pick out the polyatomic anions from the following and write the formula.
a) Chloride ion b) Fluoride ion
c) Phosphate ion d) Sulphate ion

Q. (a) 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 :

Ion	Valency (Charge)	Ion	Valency (Charge)
Sodium ion	1+	Bromide ion	1–
Ammonium ion	1+	Hydroxide ion	1–
Calcium ion	2+	Sulphate ion	2–
Lead ion	2+	Phosphate ion	3–

Using this information, write down the formulae of the following compounds :
(i) Sodium phosphate
(ii) Ammonium sulphate
(iii) Calcium hydroxide
(iv) Lead bromide

Q. write the basic and acidic radicals of the following and then write the chemical formulae of the compound.
Magnesium phosphate

The ionic compound formed by the ions ${Fe}^{3 +}$ and $({SO}_{4})^{2 -}$ has the chemical formula ________.

Q. The chemical formula of the ionic compound containing copper(II) & sulphate ions is .

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