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ph of 0.001 m naoh

Understanding the pH of 0.001 M NaOH Solution

The pH of a solution is a crucial parameter that reflects its acidity or basicity. The concept of pH is deeply rooted in chemistry and signifies the concentration of hydrogen ions (H⁺) present in a solution. In this article, we delve into the pH of a 0.001 M sodium hydroxide (NaOH) solution, a common strong base used in various chemical applications.

Sodium hydroxide is a strong alkaline compound that completely dissociates in water. In a 0.001 M NaOH solution, the dissociation can be represented as follows

\[ \text{NaOH} \rightarrow \text{Na}^+ + \text{OH}^- \]

From this reaction, we see that for every mole of NaOH that dissociates, one mole of hydroxide ions (OH⁻) is produced. Therefore, a 0.001 M NaOH solution will yield an equal concentration of hydroxide ions, 0.001 M OH⁻.

To find the pH, we first need to calculate the pOH of the solution using the following relationship

\[ \text{pOH} = -\log[\text{OH}^-] \]

Substituting the concentration of hydroxide ions into the equation gives

\[ \text{pOH} = -\log[0.001] = -\log[10^{-3}] = 3 \]

ph of 0.001 m naoh

The relationship between pH and pOH is established through the equation

\[ \text{pH} + \text{pOH} = 14 \]

Using the previously calculated pOH, we can now find the pH of the 0.001 M NaOH solution

\[ \text{pH} = 14 - \text{pOH} = 14 - 3 = 11 \]

Thus, the pH of a 0.001 M NaOH solution is 11, indicating that the solution is alkaline. This elevated pH level signifies a low concentration of hydrogen ions, affirming the strong basic nature of sodium hydroxide.

Understanding the pH of 0.001 M NaOH is essential not just in laboratory settings but also in practical applications. For instance, it plays a vital role in industries involving waste treatment, soap manufacturing, and food processing, where pH levels must be tightly controlled to ensure chemical reactions proceed as intended.

Moreover, the ability to control and predict pH is paramount in biological systems. For example, human blood maintains a pH between 7.35 and 7.45, which is slightly basic. However, if hydroxide ions from substances like NaOH were introduced excessively into the system, it could lead to serious health issues due to the disruption of this pH balance.

In conclusion, the pH of a 0.001 M NaOH solution is 11, reflecting its strong basicity. Understanding the pH and its implications is vital across various fields, from industrial applications to healthcare. Whenever working with strong bases like sodium hydroxide, proper care must be exercised to avoid hazardous reactions that could arise from improper pH levels.

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