Calculate Ph of 0.005 M Naoh
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Reviewed by Calculator Editorial Team
This calculator helps you determine the pH of a 0.005 M NaOH solution. Sodium hydroxide (NaOH) is a strong base that completely dissociates in water, making it ideal for pH calculations.
Introduction
The pH of a solution is a measure of its acidity or basicity. For strong bases like NaOH, the pH can be calculated directly from the molarity (M) of the solution. This calculator provides an accurate pH value for a 0.005 M NaOH solution.
Note: This calculator assumes the solution is at standard temperature and pressure (STP) and that NaOH is a strong base with complete dissociation.
How to Calculate pH
The pH of a strong base solution can be calculated using the following formula:
pH = 14 + log₁₀[OH⁻]
Where [OH⁻] is the concentration of hydroxide ions in moles per liter (M). For a strong base like NaOH, the concentration of hydroxide ions is equal to the molarity of the solution.
For a 0.005 M NaOH solution:
[OH⁻] = 0.005 M
Plugging this into the pH formula:
pH = 14 + log₁₀(0.005)
Calculating the logarithm:
log₁₀(0.005) ≈ -2.3010
Therefore:
pH = 14 + (-2.3010) = 11.6990
Rounding to two decimal places, the pH of a 0.005 M NaOH solution is approximately 11.70.
Example Calculation
Let's walk through the calculation step-by-step for a 0.005 M NaOH solution:
- Identify the molarity of NaOH: 0.005 M
- Since NaOH is a strong base, [OH⁻] = 0.005 M
- Use the pH formula: pH = 14 + log₁₀[OH⁻]
- Calculate log₁₀(0.005) ≈ -2.3010
- Add to 14: 14 + (-2.3010) = 11.6990
- Round to two decimal places: pH ≈ 11.70
The result shows that a 0.005 M NaOH solution is strongly basic with a pH of approximately 11.70.
FAQ
What is the pH of a 0.005 M NaOH solution?
The pH of a 0.005 M NaOH solution is approximately 11.70.
How is pH calculated for strong bases?
For strong bases like NaOH, pH is calculated using the formula pH = 14 + log₁₀[OH⁻], where [OH⁻] is equal to the molarity of the solution.
Why is the pH of NaOH solutions high?
NaOH is a strong base that completely dissociates in water, producing a high concentration of hydroxide ions, which results in a high pH.
Can this calculator be used for other strong bases?
Yes, this method can be applied to any strong base solution by entering the appropriate molarity.