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Ions

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Question

Write the formulae and names of the compounds formed by the following ions: 1.Pottasium ion and iodine ion 2.Sodium ion and sulphide ion 3.Aluminium ion and phosphate ion.

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Solution

Dear Student,

The compound formed between potassium(K⁺) and Iodide (I^-1) ions is Potassium Iodide (KI)
The compound formed between sodium(Na⁺) and sulphide(S^-2) ions is Sodium Sulphide (Na₂S)
The Compound formed between aluminium (Al⁺³) and phosphate (PO₄^-3) is aluminium phosphate (AlPO₄)

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Similar questions

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. 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 the difference between a cation and an anion ? Explain with examples.
(b) The valencies (or charges) of some of the ions are given below :

Ion	Valency (Charge)	Ion	Valency (Charge)
Sodium ion	1+	Nitrate ion	1–
Copper ion	2+	Sulphide ion	2–

Using this information, write down the formulae of :
(i) Sodium sulphide
(ii) Copper nitrate

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