Calculate The Ph of Each of The Following Aqueous Solutions

What is pH?

The pH scale measures how acidic or basic a solution is. It ranges from 0 to 14, where:

• pH 0-6: Acidic solutions (e.g., lemon juice, vinegar)
• pH 7: Neutral (e.g., pure water)
• pH 8-14: Basic solutions (e.g., baking soda, soap)

The pH scale is logarithmic, meaning each whole number change represents a tenfold difference in acidity or basicity.

pH Formula

The pH of a solution is calculated using the concentration of hydrogen ions ([H⁺]) in moles per liter (M):

Where:

• [H⁺] = concentration of hydrogen ions in moles per liter (M)
• log₁₀ = base-10 logarithm

For example, if a solution has a hydrogen ion concentration of 1 × 10^-5 M, its pH would be 5.

Calculating pH

To calculate the pH of an aqueous solution:

1. Determine the concentration of hydrogen ions ([H⁺]) in the solution.
2. Take the negative base-10 logarithm of the hydrogen ion concentration.
3. Round the result to one decimal place for practical use.

For example, a solution with [H⁺] = 1 × 10^-3 M would have a pH of 3.

The pH Scale

The pH scale is a logarithmic scale that measures the acidity or basicity of a solution. Key points include:

• pH 0: Most acidic (e.g., battery acid)
• pH 7: Neutral (e.g., pure water)
• pH 14: Most basic (e.g., drain cleaner)

Each pH unit represents a tenfold difference in hydrogen ion concentration. For example, a pH 3 solution has 10 times more hydrogen ions than a pH 4 solution.

Common Aqueous Solutions

Here are some common aqueous solutions and their typical pH values:

These values can vary based on concentration and other factors, but they provide a general guide.