Question

question 41 (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:

To determine the correct names, analyze each compound:

1. For $\ce{Fe3(PO4)2}$: The phosphate ion ($\ce{PO4^{3-}}$) has a charge of $3-$. Let the charge of Fe be $x$. Using charge balance: $3x + 2(-3) = 0 \implies 3x = 6 \implies x = 2$. So Fe has a $2+$ charge (iron(II)). The anion is phosphate ($\ce{PO4^{3-}}$), so the compound is iron(II) phosphate.
2. For $\ce{Zn(NO3)2}$: The nitrate ion ($\ce{NO3^-}$) has a charge of $1-$. Zinc (Zn) typically has a $2+$ charge (since $2(1-) + 2+ = 0$). The anion is nitrate, so the compound is zinc nitrate.

Option 2 matches these names.

Answer:

1. Iron(II)Phosphate and Zinc nitrate