Question

question 10 (1 point)
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the correct names of fe₃(po₄)₂ and zn(no₃)₂ are:

1. iron(iii)phosphate and zinc nitrate
2. iron(ii)phosphate and zinc nitrate
3. iron(ii)phosphide and zinc nitrogen oxide
4. iron(iii)phosphide and zinc nitrogen oxide

Explanation:

• For \(Fe_3(PO_4)_2\):
• The phosphate ion \((PO_4^{3 -})\) has a charge of \(- 3\). Let the oxidation state of \(Fe\) be \(x\). Using the formula for charge balance in a compound (\(3x+2\times(-3)=0\)), we solve \(3x - 6 = 0\), so \(x = + 2\). So it is Iron(II) phosphate.
• For \(Zn(NO_3)_2\):
• The nitrate ion \((NO_3^{-})\) has a charge of \(-1\). Zinc (\(Zn\)) has a common oxidation state of \(+2\) in such compounds. The name of \(NO_3^{-}\) is nitrate. So it is Zinc nitrate.

Answer:

1. Iron(II)Phosphate and Zinc nitrate