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Chapter 2: Problem 44

Write formulas for the following ionic compounds. (a) hydrochloric acid (b) sodium nitrite (c) chromium(III) sulfite (d) potassium chlorate (e) iron(III) perbromate

Short Answer

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Question: Write the chemical formulas for the following ionic compounds: (a) Hydrochloric acid, (b) Sodium nitrite, (c) Chromium(III) sulfite, (d) Potassium chlorate, (e) Iron(III) perbromate. Answer: (a) HCl, (b) NaNO_2, (c) Cr_2(SO_3)_3, (d) KClO_3, (e) Fe(BrO_4)_3.

Step by step solution

01

(Identify Ions)

First, it is important to know the common ions and their charges. For each compound, determine the cation (positive ion) and the anion (negative ion) present, along with their respective charges. (a) Hydrochloric acid cation: H^+ (hydrogen ion) anion: Cl^- (chloride ion) (b) Sodium nitrite cation: Na^+ (sodium ion) anion: NO_2^- (nitrite ion) (c) Chromium(III) sulfite cation: Cr^{3+} (chromium(III) ion) anion: SO_3^{2-} (sulfite ion) (d) Potassium chlorate cation: K^+ (potassium ion) anion: ClO_3^- (chlorate ion) (e) Iron(III) perbromate cation: Fe^{3+} (iron(III) ion) anion: BrO_4^- (perbromate ion) ##Step 2: Write the chemical formulas for each compound##
02

(Write the Formulas)

To write the chemical formula for each compound, combine the cations and anions with subscripts according to their charges, so that the overall charge of the compound is neutral. (a) Hydrochloric acid Formula: HCl (since the charges of H^+ and Cl^- are equal and opposite) (b) Sodium nitrite Formula: NaNO_2 (since the charges of Na^+ and NO_2^- are equal and opposite) (c) Chromium(III) sulfite Formula: Cr_2(SO_3)_3 (requires 2 Cr^{3+} ions and 3 SO_3^{2-} ions to form a neutral compound) (d) Potassium chlorate Formula: KClO_3 (since the charges of K^+ and ClO_3^- are equal and opposite) (e) Iron(III) perbromate Formula: Fe(BrO_4)_3 (requires 1 Fe^{3+} ion and 3 BrO_4^- ions to form a neutral compound)

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