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Chapter 5: Problem 45

Write the formula for each of the following compounds that contain polyatomic ions. Be sure to enclose the polyatomic ion in parentheses if more than one such ion is needed to balance the oppositely charged ion(s). a. ammonium nitrate b. magnesium acetate c. calcium peroxide d. potassium hydrogen sulfate e. iron(II) sulfate f. potassium hydrogen carbonate g. cobalt(II) sulfate h. lithium perchlorate

Short Answer

Expert verified
a. NH鈧凬O鈧� b. Mg(CH鈧僀OO)鈧� c. CaO鈧� d. KHSO鈧� e. FeSO鈧� f. KHCO鈧� g. CoSO鈧� h. LiClO鈧�

Step by step solution

01

a. Ammonium nitrate

First, identify the ions in the compound. Ammonium (NH鈧勨伜) has a positive charge, and nitrate (NO鈧冣伝) has a negative charge. Since both ions have charges of one (but opposite signs), we don't need to multiply any of them by a number. So, the formula for ammonium nitrate is NH鈧凬O鈧�.
02

b. Magnesium acetate

The ions in this compound are magnesium (Mg虏鈦�) and acetate (CH鈧僀OO鈦�). Magnesium has a charge of 2+, and acetate has a charge of 1-, so we need two acetate ions to balance the magnesium charge. The formula for magnesium acetate is Mg(CH鈧僀OO)鈧�.
03

c. Calcium peroxide

The ions in this compound are calcium (Ca虏鈦�) and peroxide (O鈧偮测伝). Both ions have charges of 2, so we don't need to multiply any of them by a number. The formula for calcium peroxide is CaO鈧�.
04

d. Potassium hydrogen sulfate

This compound contains potassium (K鈦�) and hydrogen sulfate (HSO鈧勨伝) ions. Both ions have charges of one, so we don't need to multiply any of them by a number. The formula for potassium hydrogen sulfate is KHSO鈧�.
05

e. Iron(II) sulfate

Iron(II) has a charge of 2+ (Fe虏鈦�), and sulfate has a charge of 2- (SO鈧劼测伝). Both ions have charges of 2, so we don't need to multiply any of them by a number. The formula for iron(II) sulfate is FeSO鈧�.
06

f. Potassium hydrogen carbonate

This compound contains potassium (K鈦�) and hydrogen carbonate (HCO鈧冣伝) ions. Both ions have charges of one, so we don't need to multiply any of them by a number. The formula for potassium hydrogen carbonate is KHCO鈧�.
07

g. Cobalt(II) sulfate

Cobalt(II) has a charge of 2+ (Co虏鈦�), and sulfate has a charge of 2- (SO鈧劼测伝). Both ions have charges of 2, so we don't need to multiply any of them by a number. The formula for cobalt(II) sulfate is CoSO鈧�.
08

h. Lithium perchlorate

This compound contains lithium (Li鈦�) and perchlorate (ClO鈧勨伝) ions. Both ions have charges of one, so we don't need to multiply any of them by a number. The formula for lithium perchlorate is LiClO鈧�.

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Most popular questions from this chapter

Write the name of each of the following ionic substances, using the system that includes a Roman numeral to specify the charge of the cation. a. \(\mathrm{SnO}\) d. \(\mathrm{Cu}_{2} \mathrm{S}\) b. \(\operatorname{SnO}_{2}\) e. \(\mathrm{FeCl}_{3}\) c. \(CuS\) f. \(\mathrm{Fel}_{2}\)

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