Write the complete ionic equations and net ionic equations for the following reactions. (a)...
Question:
Write the complete ionic equations and net ionic equations for the following reactions.
(a) Aqueous sulfuric acid is neutralized by aqueous potassium hydroxide.
(b) Aqueous magnesium hydroxide is neutralized by aqueous hydrochloric acid.
Writing Ionic Equations:
Generally, chemists use full balanced equations to communicate information about a chemical reaction. However, in some cases, it may be of more use if the equation were simplified so that only the reacting species were shown. This is because some of the ions of the species appear on both sides of the arrow unchanged, implying that they are merely 'spectators' - these can be cancelled out from both sides.
Answer and Explanation: 1
The two equations both refer to neutralization reactions between an acid and a base, forming a soluble salt and water only. First, we write the full equation, followed by the complete ionic equation, and lastly, the net ionic equation.
(a) Full equation: {eq}H_2SO_4 (aq) + 2KOH (aq) \rightarrow K_2SO_4 (aq) + 2H_2O (l) {/eq}
Complete ionic equation: {eq}2H^+ (aq) + SO_4^{2-} (aq) + 2K^+(aq) + 2OH^- (aq) \rightarrow 2K^+(aq) + SO_4^{2-} (aq) + 2H_2O(l) {/eq}
Net ionic equation: {eq}H^+ (aq) + OH^- (aq) \rightarrow H_2O(l) {/eq}
(b) Full equation: {eq}Mg(OH)_2(aq) + 2HCl(aq) \rightarrow MgCl_2(aq) + 2H_2O(l) {/eq}
Complete ionic equation: {eq}Mg^{2+} (aq) + 2OH^-(aq) + 2H^+(aq) + 2Cl^-(aq) \rightarrow Mg^{2+} (aq) + 2Cl^-(aq) + 2H_2O(l) {/eq}
Net ionic equation: {eq}H^+ (aq) + OH^- (aq) \rightarrow H_2O(l) {/eq}.
Note that the net ionic equation for the neutralization reaction is the same.
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Chapter 4 / Lesson 6Learn about neutralization definition and various types of acid-base neutralization reaction examples. Understand weak acids and bases, and the applications of neutralization reaction.
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