MgCl2(aq) + H2(g)os uoy ob td Example. 2 H2O2(aq) Mn02 2 H20(1) + O2(g) renfe) hydrogen peroxide are generated. 1.2 Ca(NO3)2(s) → 2 CaO(s) + 4 NO2(g) + O2(g) 2. ZnCl2(aq) + 2 NaOH(aq) → Zn(OH)2(s) + 2 NaCI(aq) + 3. Mg(s) + 2 HCI(aq) hydrochloric acid SIO Last updated: 10/3/20

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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### Example: Decomposition of Hydrogen Peroxide

**Reaction:**
\[ \text{2 H}_2\text{O}_2(aq) \xrightarrow{\text{MnO}_2} \text{2 H}_2\text{O}(l) + \text{O}_2(g) \]

**Description:**
Hydrogen peroxide in aqueous solution decomposes in the presence of manganese(IV) oxide. As a result of the reaction, liquid water and oxygen gas are generated.

---

### Chemical Reactions

1. **Decomposition Reaction**
   \[ \text{2 Ca(NO}_3\text{)}_2(s) \rightarrow \text{2 CaO(s) + 4 NO}_2\text{(g) + O}_2\text{(g)} \]

2. **Double Displacement Reaction**
   \[ \text{ZnCl}_2(aq) + \text{2 NaOH}(aq) \rightarrow \text{Zn(OH)}_2(s) + \text{2 NaCl}(aq) \]

3. **Single Displacement Reaction**
   \[ \text{Mg(s) + 2 HCl(aq)} \rightarrow \text{MgCl}_2(aq) + \text{H}_2(g) \]
   - \emph{Hydrochloric acid}

---

**Last updated:** 10/3/20
Transcribed Image Text:### Example: Decomposition of Hydrogen Peroxide **Reaction:** \[ \text{2 H}_2\text{O}_2(aq) \xrightarrow{\text{MnO}_2} \text{2 H}_2\text{O}(l) + \text{O}_2(g) \] **Description:** Hydrogen peroxide in aqueous solution decomposes in the presence of manganese(IV) oxide. As a result of the reaction, liquid water and oxygen gas are generated. --- ### Chemical Reactions 1. **Decomposition Reaction** \[ \text{2 Ca(NO}_3\text{)}_2(s) \rightarrow \text{2 CaO(s) + 4 NO}_2\text{(g) + O}_2\text{(g)} \] 2. **Double Displacement Reaction** \[ \text{ZnCl}_2(aq) + \text{2 NaOH}(aq) \rightarrow \text{Zn(OH)}_2(s) + \text{2 NaCl}(aq) \] 3. **Single Displacement Reaction** \[ \text{Mg(s) + 2 HCl(aq)} \rightarrow \text{MgCl}_2(aq) + \text{H}_2(g) \] - \emph{Hydrochloric acid} --- **Last updated:** 10/3/20
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