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The pH of a 0.05% NaOH Solution Sodium hydroxide (NaOH), commonly known as lye or caustic soda, is a strong base that plays a significant role in various industrial and laboratory applications. Understanding the pH of sodium hydroxide solutions is crucial for chemists and professionals in the field. This article focuses on a specific concentration a 0.05% NaOH solution. The pH of a 0 .05% NaOH Solution A 0.05% NaOH solution can be prepared by dissolving 0.05 grams of sodium hydroxide in 100 milliliters of water. Given that NaOH is a strong base, it completely ionizes in aqueous solution to produce sodium ions (Na⁺) and hydroxide ions (OH⁻). The concentration of hydroxide ions in a 0.05% solution can be calculated straightforwardly. The molecular weight of NaOH is approximately 40 g/mol, meaning that 0.05 grams corresponds to about 0.00125 moles of NaOH. When this sodium hydroxide dissolves, it produces the same number of moles of hydroxide ions. 0.05 m naoh ph To calculate the pH, we first need to determine the concentration of hydroxide ions. In 100 mL of solution, 0.00125 moles of OH⁻ gives a concentration of 0.0125 moles per liter (M) or 12.5 mM. The pOH of this solution can be calculated using the formula pOH = -log[OH⁻]. Thus, the pOH of our 0.05% NaOH solution is approximately 1.9. To find the pH, we can use the relationship pH + pOH = 14. Therefore, pH = 14 - pOH. Substituting the calculated pOH gives a pH of approximately 12.1. This indicates that the solution is highly alkaline, which is consistent with expectations for a NaOH solution. Understanding the pH of a 0.05% NaOH solution is vital not only for chemical applications but also for ensuring safety in handling. Sodium hydroxide is corrosive, and precautions should be taken to avoid contact with skin or eyes. In laboratory settings, proper dilution techniques and personal protective equipment (PPE) are essential when working with strong bases like NaOH. In summary, a 0.05% NaOH solution exhibits a pH of around 12.1, demonstrating its strong alkalinity. This information is fundamental for both practical applications and safety protocols in environments where sodium hydroxide is utilized. Appreciate the power of chemistry and the significance of understanding solution pH in various contexts.

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