1. The figure below shows the hydronium ion concentration for various concentrations of hydrochloric acid (orange line) and acetic acid (blue line). Compare the slopes and clearly explain what chemical property relates to the difference in slopes between the two acids Hydronium lon Concentration (M) 1.40E-02 1.20E-02 1.00E-02 8.00E-03 6.00E-03 4.00E-03 2.00E-03 0.00E+00 0.00E+00 2.00E-03 4.00E-03 6.00E-03 8.00E-03 1.00E-02 1.20E-02 1.40E-02 Acid Concentration (M)

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 Figure 1. Plot of hydronium ion concentration versus acid concentration. The orange line shows data for hydrochloric acid with a trendline of y = 0.9972x + 5E-05 and R2 of 0.9989. The blue line shows data for acetic acid with a trendline of y = 0.033x + 9E-05 and R2 of 0.9555

The graph depicts the relationship between the hydronium ion concentration and various concentrations of hydrochloric acid (orange line) and acetic acid (blue line).

- **Y-axis**: Represents the hydronium ion concentration in moles per liter (M).
- **X-axis**: Represents the acid concentration in moles per liter (M).

**Description of Lines:**

1. **Orange Line (Hydrochloric Acid)**: 
   - The graph demonstrates a strong positive linear relationship between hydrochloric acid concentration and hydronium ion concentration.
   - As the concentration of hydrochloric acid increases, the hydronium ion concentration increases proportionally.

2. **Blue Line (Acetic Acid)**:
   - This line shows a much gentler slope compared to the orange line.
   - The increase in hydronium ion concentration is less pronounced with increasing acetic acid concentration.

**Explanation:**

The difference in slopes of the lines relates to the chemical properties of the acids. Hydrochloric acid is a strong acid, meaning it dissociates completely in solution, resulting in a direct proportional increase in hydronium ions with increasing concentration. Acetic acid, on the other hand, is a weak acid and only partially dissociates in solution, which is why the increase in hydronium ions is less significant at similar concentrations.
Transcribed Image Text:The graph depicts the relationship between the hydronium ion concentration and various concentrations of hydrochloric acid (orange line) and acetic acid (blue line). - **Y-axis**: Represents the hydronium ion concentration in moles per liter (M). - **X-axis**: Represents the acid concentration in moles per liter (M). **Description of Lines:** 1. **Orange Line (Hydrochloric Acid)**: - The graph demonstrates a strong positive linear relationship between hydrochloric acid concentration and hydronium ion concentration. - As the concentration of hydrochloric acid increases, the hydronium ion concentration increases proportionally. 2. **Blue Line (Acetic Acid)**: - This line shows a much gentler slope compared to the orange line. - The increase in hydronium ion concentration is less pronounced with increasing acetic acid concentration. **Explanation:** The difference in slopes of the lines relates to the chemical properties of the acids. Hydrochloric acid is a strong acid, meaning it dissociates completely in solution, resulting in a direct proportional increase in hydronium ions with increasing concentration. Acetic acid, on the other hand, is a weak acid and only partially dissociates in solution, which is why the increase in hydronium ions is less significant at similar concentrations.
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