Determine the mass of solid NaCH:COO that must be dissolved in an existing 500.0 mL solution of 0.200 M CH:COOH to form a buffer with a pH equal to 5.00. The value of Ka for CH:COOH is 1.8 × 10-8.
Ionic Equilibrium
Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Ionic equilibrium is established between the ions and unionized species in a system. Understanding the concept of ionic equilibrium is very important to answer the questions related to certain chemical reactions in chemistry.
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Bronsted Lowry Base In Inorganic Chemistry
Bronsted-Lowry base in inorganic chemistry is any chemical substance that can accept a proton from the other chemical substance it is reacting with.
Determine the mass of solid NaCH₃COO that must be dissolved in an existing 500.0 mL solution of 0.200 M CH₃COOH to form a buffer with a pH equal to 5.00. The value of Ka for CH₃COOH is 1.8 × 10⁻⁵.
![**Buffer Preparation Exercise**
**Objective:**
Determine the mass of solid NaCH₃COO that must be dissolved in an existing 500.0 mL solution of 0.200 M CH₃COOH to form a buffer with a pH equal to 5.00. The value of Ka for CH₃COOH is 1.8 × 10⁻⁵.
**Instructions:**
Let x represent the original concentration of CH₃COO⁻ in the water. Based on the given values, set up the ICE table in order to determine the unknown.
**Chemical Equation:**
\[ \text{CH}_3\text{COOH(aq)} + \text{H}_2\text{O(l)} \rightleftharpoons \text{H}_3\text{O}^+\text{(aq)} + \text{CH}_3\text{COO}^-\text{(aq)} \]
**ICE Table Setup:**
| | CH₃COOH (aq) | | H₃O⁺ (aq) | | CH₃COO⁻ (aq) |
|----------------|--------------|-----|-----------|-----|--------------|
| Initial (M) | | | | | |
| Change (M) | | | | | |
| Equilibrium (M)| | | | | |
**Data Entry Options:**
Below the ICE table, there are options for entering values such as:
- \( 1.0 \times 10^{-5} \)
- \( -1.0 \times 10^{-5} \)
- \( 1.8 \times 10^{-5} \)
- Other placeholders for values such as \( 0 \), \( x \), \( 0.200 \), and numeric adjustments of ±5 or ±1 × 10⁻⁹.
**Reset Button:**
There is a "RESET" button available to clear entries and restart the setup if necessary.
This setup is intended for calculating the equilibrium state necessary to achieve the desired pH in the buffer solution.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F032e5673-4a39-4f75-b1a9-31bfcb0adacb%2F08bfb5a2-2cb7-4d93-b676-6b28e5369534%2Fj03pve_processed.png&w=3840&q=75)
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