Question

write valency and formula of a. Sulphate b. Nitrate c. Zincate d. Ammonium e. phospate​

Answer 1

• valency of sulphate is 2 because sulphate can bond with 2 positive hydrogen atoms its valency is the opposite charge and often expressed as -2 formulae of Sulphate is SO₄²-
• Nitrate ion has one nitrogen and 3 oxygen molecules oxygen lies in group 16 and thus have the valency of -2 nitrogen lies in group 15 and has the charge of +5 forming the bond with 3 oxygen atoms so the valency of Nitrate is -1 formulae of Nitrate is NO3-
• zincate anion has valency of 2 but the aluminate anion has valency of 1 we get the formulae by criss crossing the valencies that is 2 formulae of zincate is H4Na2O4Zn
• the formulae of ammonia is NH4 and valency is 1
• phosphate valency is 3 and formulae is PO₄³⁻

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Answer 2

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