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Question 1 of 16 Determine the mass of solid NaCH,CO0 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 x 10-5. NEXT Let x represent the original concentration of CH,COO- in the water. Based on the given values, set up the ICE table in order to determine the unknown. CH,COOH(aq) H:O(I) H,O (aq) CH,COO (aq) Initial (M) Change (M) Equilibrium (M)

Question 1 of 16 Determine the mass of solid NaCH,CO0 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 x 10-5. NEXT Let x represent the original concentration of CH,COO- in the water. Based on the given values, set up the ICE table in order to determine the unknown. CH,COOH(aq) H:O(I) H,O (aq) CH,COO (aq) Initial (M) Change (M) Equilibrium (M)

Chemistry
Chemistry
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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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m NaCH3COO=___g is the final part

**Buffer Preparation and Ka Expression Setup** **Question 1 of 16** **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 \(1.8 \times 10^{-5}\). **Instructions:** Based on your ICE (Initial, Change, Equilibrium) table and the definition of Ka, set up the expression for Ka in order to determine the unknown. Do not combine or simplify terms. **Given:** \[ K_a = \underline{\quad \quad \quad} = 1.8 \times 10^{-5} \] **Options for Input:** - [0] - [500.0] - [0.200] - [5.00] - [1.0 × 10⁻⁵] - [1.0 × 10⁻⁹] - [1.8 × 10⁻⁹] - [x + 5.00] - [x - 5.00] - [x = 1.0 × 10⁻⁹] - [x = 1.0 × 10⁻⁷] - [x = 1.8 × 10⁻⁷] - [x - 1.8 × 10⁻⁷] **Tools:** - Reset Button to clear selections. Use the information and prompts provided to set up the correct expression for \(K_a\) and solve the question step-by-step.
Transcribed Image Text:**Buffer Preparation and Ka Expression Setup** **Question 1 of 16** **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 \(1.8 \times 10^{-5}\). **Instructions:** Based on your ICE (Initial, Change, Equilibrium) table and the definition of Ka, set up the expression for Ka in order to determine the unknown. Do not combine or simplify terms. **Given:** \[ K_a = \underline{\quad \quad \quad} = 1.8 \times 10^{-5} \] **Options for Input:** - [0] - [500.0] - [0.200] - [5.00] - [1.0 × 10⁻⁵] - [1.0 × 10⁻⁹] - [1.8 × 10⁻⁹] - [x + 5.00] - [x - 5.00] - [x = 1.0 × 10⁻⁹] - [x = 1.0 × 10⁻⁷] - [x = 1.8 × 10⁻⁷] - [x - 1.8 × 10⁻⁷] **Tools:** - Reset Button to clear selections. Use the information and prompts provided to set up the correct expression for \(K_a\) and solve the question step-by-step.
**Question 1 of 16** **Problem Statement:** 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. **ICE Table:** | | CH₃COOH(aq) | + | H₂O(l) | ⇌ | H₃O⁺(aq) | + | CH₃COO⁻(aq) | |---------------------|-------------|---|---------|---|----------|---|-------------| | **Initial (M)** | | | | | | | | | **Change (M)** | | | | | | | | | **Equilibrium (M)** | | | | | | | | **Options for Input:** - Initial concentrations, changes, and equilibrium concentrations are presented in a selectable format below the ICE table. The following values can be assigned: - Buttons are available for various numeric values such as the following: 1.0 × 10⁻⁵, -1.0 × 10⁻⁵, 1.8 × 10⁻⁵, -1.8 × 10⁻⁵, 0.200, 5.00, -5.00, x, x + 1.0 × 10⁻⁵, x - 1.0 × 10⁻⁵, x + 1.8 × 10⁻⁵, x - 1.8 × 10⁻⁵. - A “RESET” button is available to clear the inputs. **Purpose:** The exercise helps understand the application of the ICE table in solving buffer problems and calculating the required mass of solute for a desired pH level in a chemical solution.
Transcribed Image Text:**Question 1 of 16** **Problem Statement:** 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. **ICE Table:** | | CH₃COOH(aq) | + | H₂O(l) | ⇌ | H₃O⁺(aq) | + | CH₃COO⁻(aq) | |---------------------|-------------|---|---------|---|----------|---|-------------| | **Initial (M)** | | | | | | | | | **Change (M)** | | | | | | | | | **Equilibrium (M)** | | | | | | | | **Options for Input:** - Initial concentrations, changes, and equilibrium concentrations are presented in a selectable format below the ICE table. The following values can be assigned: - Buttons are available for various numeric values such as the following: 1.0 × 10⁻⁵, -1.0 × 10⁻⁵, 1.8 × 10⁻⁵, -1.8 × 10⁻⁵, 0.200, 5.00, -5.00, x, x + 1.0 × 10⁻⁵, x - 1.0 × 10⁻⁵, x + 1.8 × 10⁻⁵, x - 1.8 × 10⁻⁵. - A “RESET” button is available to clear the inputs. **Purpose:** The exercise helps understand the application of the ICE table in solving buffer problems and calculating the required mass of solute for a desired pH level in a chemical solution.
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