Calculate The Ph of The Following Solutions 1.0 M Hi
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Reviewed by Calculator Editorial Team
This calculator helps you determine the pH of a 1.0 M HI (hydroiodic acid) solution. The pH scale measures the acidity or basicity of a solution, with values ranging from 0 (most acidic) to 14 (most basic).
Introduction
Hydroiodic acid (HI) is a strong acid that dissociates completely in water. When dissolved in water, it forms hydronium ions (H₃O⁺) and iodide ions (I⁻). The pH of a solution can be calculated using the concentration of these hydronium ions.
The pH of a solution is defined as the negative logarithm (base 10) of the hydronium ion concentration:
pH = -log[H₃O⁺]
For a 1.0 M HI solution, the concentration of H₃O⁺ is equal to the concentration of HI because HI is a strong acid and completely dissociates in water.
pH Calculation Formula
The pH of a 1.0 M HI solution can be calculated using the following formula:
pH = -log[HI]
Where [HI] is the molar concentration of hydroiodic acid.
For a 1.0 M solution, [HI] = 1.0 M. Plugging this into the formula gives:
pH = -log(1.0) = 0
This means a 1.0 M HI solution has a pH of 0, which is highly acidic.
Worked Example
Let's calculate the pH of a 1.0 M HI solution step by step.
- Determine the concentration of H₃O⁺ ions. For a strong acid like HI, [H₃O⁺] = [HI] = 1.0 M.
- Take the negative logarithm (base 10) of the H₃O⁺ concentration.
- Calculate: pH = -log(1.0) = 0.
The pH of the 1.0 M HI solution is 0, indicating a highly acidic solution.
Interpreting Results
A pH of 0 means the solution is extremely acidic. This is characteristic of strong mineral acids like HI. The pH scale is logarithmic, so each whole number change represents a tenfold difference in acidity.
For comparison:
| pH Range | Characteristic |
|---|---|
| 0-3 | Very strong acid (e.g., concentrated sulfuric acid) |
| 4-6 | Strong acid (e.g., vinegar) |
| 7 | Neutral (e.g., pure water) |
| 8-10 | Strong base (e.g., sodium hydroxide) |
| 11-14 | Very strong base (e.g., concentrated lye) |
A pH of 0 indicates a solution that is 100 million times more acidic than a pH of 2.
FAQ
- What is the pH of a 1.0 M HI solution?
- The pH of a 1.0 M HI solution is 0, indicating a highly acidic solution.
- Why is the pH of HI solution 0?
- The pH of 0 occurs because HI is a strong acid that completely dissociates in water, producing a high concentration of H₃O⁺ ions.
- Is HI solution acidic or basic?
- HI solution is acidic with a pH of 0, which is characteristic of strong acids.
- How does the concentration of HI affect the pH?
- The pH of a HI solution is directly related to its concentration. A higher concentration results in a lower pH (more acidic).
- Can I use this calculator for other strong acids?
- Yes, this calculator can be used for any strong acid with a known concentration, as they all follow the same pH calculation formula.