What is the formula of Zinc Nitrate?

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Study for the IGCSE Edexcel Chemistry Test. Access flashcards and multiple choice questions with hints and explanations. Get ready for your exam!

Multiple Choice

What is the formula of Zinc Nitrate?

Explanation:
Balancing charges to form a neutral ionic compound when a metal cation pairs with a polyatomic anion. Nitrate carries a -1 charge (NO3−), and zinc typically forms a +2 ion (Zn2+). To balance the +2 with -1 charges, you need two nitrate ions for each zinc ion, giving Zn2+ with 2×NO3−. This is written as Zn(NO3)2, with the parentheses indicating two nitrate units. The other forms wouldn’t balance to zero charge: one nitrate would leave a net positive charge, and three nitrates would require a different metal charge to balance. So the correct formula is Zn(NO3)2.

Balancing charges to form a neutral ionic compound when a metal cation pairs with a polyatomic anion.

Nitrate carries a -1 charge (NO3−), and zinc typically forms a +2 ion (Zn2+). To balance the +2 with -1 charges, you need two nitrate ions for each zinc ion, giving Zn2+ with 2×NO3−. This is written as Zn(NO3)2, with the parentheses indicating two nitrate units.

The other forms wouldn’t balance to zero charge: one nitrate would leave a net positive charge, and three nitrates would require a different metal charge to balance. So the correct formula is Zn(NO3)2.

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