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Chapter 10: Problem 50

Use the solubility rules to predict whether the following compounds are soluble or insoluble in water. If a compound is soluble, write the net ionic equation for the dissolution of the compound into its component ions in water. (a) iron(III) bromide

Short Answer

Expert verified
Iron(III) bromide is soluble; net ionic equation: FeBr鈧�(s) 鈫� Fe鲁鈦�(aq) + 3Br鈦�(aq).

Step by step solution

01

Identify the Cation and Anion

Iron(III) bromide is composed of iron(III) ions and bromide ions. The formula for iron(III) bromide is FeBr鈧�, which means the cation is Fe鲁鈦� and the anion is Br鈦�.
02

Apply Solubility Rules for Bromides

Refer to the solubility rules for bromides: "Most bromides are soluble in water, with the exceptions being bromides of lead (Pb虏鈦�), mercury (Hg鈧偮测伜), and silver (Ag鈦�)." Since Fe鲁鈦� is not one of the exceptions, FeBr鈧� is soluble in water.
03

Write the Dissolution Equation

Since iron(III) bromide is soluble, we write the net ionic equation for its dissolution. When dissolved in water, FeBr鈧� dissociates into Fe鲁鈦� and Br鈦� ions.
04

Write the Net Ionic Equation

For the dissolution of iron(III) bromide, the net ionic equation showing the ions in solution is: FeBr鈧�(s) 鈫� Fe鲁鈦�(aq) + 3Br鈦�(aq)

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

iron(III) bromide
Iron(III) bromide is a chemical compound with the formula FeBr鈧�. It consists of iron and bromine, where iron is in the +3 oxidation state. This compound is often encountered in chemistry due to its interactions with water and the role it plays in reactions. Iron(III) bromide is a brown solid, and when discussing its solubility, we refer to the solubility rules for bromides. Most bromides are soluble except for those paired with ions like lead or silver. Since iron isn't one of these exceptions, iron(III) bromide is considered soluble in water. Further, understanding iron(III) bromide helps in predicting and explaining its behavior in aqueous solutions.
net ionic equation
A net ionic equation is a streamlined version of a chemical reaction. It specifically shows the ions involved in the actual chemical change, omitting any spectator ions that do not participate directly. For iron(III) bromide, once dissolved in water, it dissociates into cations and anions: Fe鲁鈦� (iron ions) and Br鈦� (bromide ions). The net ionic equation focuses on these ions in aqueous solution: - FeBr鈧�(s) 鈫� Fe鲁鈦�(aq) + 3Br鈦�(aq) Here, the equation shows iron(III) bromide solid separating into aqueous ions. This net ionic equation helps in understanding the dissociation process and the ionic interactions occurring in solution.
dissolution process
Dissolution is the process by which a solid solute forms a solution in a solvent. For iron(III) bromide, dissolution involves breaking apart its ionic bonds when introduced to water. Water, being a polar solvent, interacts with the ions composing FeBr鈧�.
  • The polar water molecules surround the Fe鲁鈦� and Br鈦� ions.
  • Hydration shells form as water molecules align their dipoles to stabilize these ions.
  • This action dissolves FeBr鈧� into Fe鲁鈦� and Br鈦�, ready to participate in chemical processes in the solution.
Understanding the dissolution process is crucial for predicting solubility and writing net ionic equations. It allows chemists to elucidate how ionic compounds behave in water, a common solvent for many chemical reactions.

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Most popular questions from this chapter

Complete and balance the equations for the following combination reactions: (a) \(\mathrm{Mg}(s)+\mathrm{N}_{2}(g) \rightarrow\) (b) \(\mathrm{H}_{2}(g)+\mathrm{S}(s) \rightarrow\) (c) \(\mathrm{MgO}(s)+\mathrm{SO}_{2}(g) \rightarrow\)

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Classify each of the reactions described by the following chemical equations as combination, decomposition, single replacement, or double replacement. If the equation is not balanced, balance it. (a) \(\mathrm{NaClO}_{3}(s) \rightarrow \mathrm{NaCl}(s)+\mathrm{O}_{2}(g)\) (b) \(\mathrm{CaO}(s)+\mathrm{SO}_{3}(g) \rightarrow \mathrm{CaSO}_{4}(s)\) (c) \(\mathrm{H}_{2}(g)+\mathrm{AgCl}(s) \underset{\mathrm{H}_{2} \mathrm{O}(t)}{\mathrm{Ag}(s)+\mathrm{HCl}(a q)}\) (d) \(\mathrm{Hg}_{2}\left(\mathrm{NO}_{3}\right)_{2}(a q)+\mathrm{CH}_{3} \mathrm{COOH}(a q) \rightarrow\) \(\mathrm{Hg}_{2}\left(\mathrm{CH}_{3} \mathrm{COO}\right)_{2}(s)+\mathrm{HNO}_{3}(a q)\)

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Write the balanced chemical equation for the following reactions: (a) When table sugar, \(\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}(s)\), is heated on a stove, it decomposes, forming a black solid and water. (b) When chlorine gas is bubbled through a clear solution of sodium bromide, the solution turns light brown. (c) When lithium oxide is added to water, it forms a basic solution.
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