Calculation of pH
The pH of a NaOH solution with a concentration of 6.17 Ã 10^-5 is calculated by first determining the pOH (which is 4.21 in this case) and then subtracting it from 14 to yield a final pH of 9.79.
The pH of a solution indicates its acidity or basicity on a scale of 0 to 14, with 7 being neutral, below 7 being acidic, and above 7 being basic. In this case, we are dealing with a NaOH (sodium hydroxide) solution which is a strong base.
To calculate the pH of a NaOH solution, we first need to determine the pOH (the negative logarithm of the hydroxide ion, OH-, concentration). Given that the NaOH concentration is 6.17 Ã 10^-5, we can assume this to be the OH- concentration since NaOH fully ionizes in water.
Next, we calculate the pOH:
pOH = -log(6.17 Ã 10^-5)
pOH = 4.21
Using the relationship between pH and pOH, we can find the pH of the solution. The formula to convert pOH to pH is:
pH = 14 - pOH
pH = 14 - 4.21
Therefore, the pH of the NaOH solution is 9.79.
This process of determining the pH from the concentration of hydroxide ions is essential in understanding the chemical properties of solutions and their behavior in various reactions.