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Acids and Bases in Water

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Question

Write the formula and names of the compounds formed between:
Potassium and carbonate ions
Sodium and sulphide ions
Ammonium and phospate ions

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Solution

Dear Student,
The compound formed between potassium(K⁺) and carbonate(CO₃^-2) is Potassium Carbonate (K₂CO₃)
The compound formed between sodium(Na⁺) and sulphide(S^-2) ions is Sodium Sulphide (Na₂S)
The Compound formed between ammonium (NH₄⁺) and phosphate (PO₄^-3) is ammonium phosphate (NH₄)₃PO₄
Regards!

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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

P b^{2 +}, N_{2}, B, P H_{3}, A g, I^{-}

Name the compound formed from

P b^{2 +}

I^{-}

ions and write a formula for it.

Q. The correct chemical formulae of the given compounds (i) Aluminium phosphate (ii) Potassium permanganate and (iii) Ammonium carbonate are:

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Acids and Bases in Water

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