What is the pH of 0.001 mol dm4 solution of sodium hydroxide?

Assessment: JAMB UTME - Chemistry - 2015 Subject: Chemistry

Question 1 Report

What is the pH of 0.001 mol dm4 solution of sodium hydroxide?
Answer Details
The pH of a solution of sodium hydroxide (NaOH) is a measure of its acidity or basicity. The pH scale ranges from 0 to 14, with 7 being neutral, less than 7 being acidic, and greater than 7 being basic. A 0.001 mol/dm^3 solution of NaOH is a very dilute solution, but it is still basic. NaOH is a strong base and dissociates completely in water to form hydroxide ions (OH-), which are responsible for its basicity. The pH of a basic solution can be calculated using the equation: pH = -log[OH^-] where [OH^-] is the concentration of hydroxide ions in the solution. In this case, the concentration of hydroxide ions is equal to the concentration of the NaOH solution, which is 0.001 mol/dm^3. So, pH = -log(0.001) = 3 Therefore, the pH of a 0.001 mol/dm^3 solution of sodium hydroxide is 11.

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