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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Please answer B:
![### Balancing Chemical Equations
Balancing chemical equations is a fundamental skill in chemistry. It ensures that the law of conservation of mass is followed, meaning the number of atoms for each element is the same on both sides of the equation.
**Problem Statement:**
Balance the following equations:
#### A)
\[ \text{BrO}_{3}^{-} + \text{N}_{2}\text{H}_{4} \rightarrow \text{Br}^{-} + \text{N}_{2} \quad \text{(acidic solution)} \]
#### B)
\[ \text{NO}_{2}^{-} \text{(aq)} + \text{Al} \text{(s)} \rightarrow \text{NH}_{3} \text{(aq)} + \text{Al(OH)}_{4}^{-} \text{(aq)} \quad \text{(basic conditions)} \]
**Guide to Solving:**
1. **Identify the Redox Pairs:** Determine which elements are oxidized and which are reduced.
2. **Balance Redox Changes:** Balance the changes in oxidation states.
3. **Balance Atoms and Ions:** Start with atoms involved in redox changes and then balance other atoms and charges.
4. **Apply Acidic or Basic Conditions:** In acidic solutions, balance using H\(_2\)O and H\(^+\). In basic conditions, use H\(_2\)O and OH\(^-\).
Notice that in acidic or basic conditions, additional steps are required to balance the hydrogen and oxygen atoms typically using H\(_2\)O, H\(^+\), or OH\(^-\) as necessary.
By applying these principles, ensure that each side of the equation has equal numbers of each atom type and that the charges are also balanced.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F43ef5448-495e-49e8-9cec-405cabc5c22f%2F273effcb-2594-4f60-9d8e-ddf2058b7f4c%2Ffklp16.jpeg&w=3840&q=75)
Transcribed Image Text:### Balancing Chemical Equations
Balancing chemical equations is a fundamental skill in chemistry. It ensures that the law of conservation of mass is followed, meaning the number of atoms for each element is the same on both sides of the equation.
**Problem Statement:**
Balance the following equations:
#### A)
\[ \text{BrO}_{3}^{-} + \text{N}_{2}\text{H}_{4} \rightarrow \text{Br}^{-} + \text{N}_{2} \quad \text{(acidic solution)} \]
#### B)
\[ \text{NO}_{2}^{-} \text{(aq)} + \text{Al} \text{(s)} \rightarrow \text{NH}_{3} \text{(aq)} + \text{Al(OH)}_{4}^{-} \text{(aq)} \quad \text{(basic conditions)} \]
**Guide to Solving:**
1. **Identify the Redox Pairs:** Determine which elements are oxidized and which are reduced.
2. **Balance Redox Changes:** Balance the changes in oxidation states.
3. **Balance Atoms and Ions:** Start with atoms involved in redox changes and then balance other atoms and charges.
4. **Apply Acidic or Basic Conditions:** In acidic solutions, balance using H\(_2\)O and H\(^+\). In basic conditions, use H\(_2\)O and OH\(^-\).
Notice that in acidic or basic conditions, additional steps are required to balance the hydrogen and oxygen atoms typically using H\(_2\)O, H\(^+\), or OH\(^-\) as necessary.
By applying these principles, ensure that each side of the equation has equal numbers of each atom type and that the charges are also balanced.
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