Question

1. A lab technician prepares solutions for student labs. She dissolves 660. grams of sodium

hydroxide in enough water to make a 2.00 liter of solution.
Questions:
i)
ii)
Is this solution acidic or basic?
Calculate this solution's hydrogen ion concentration, hydroxide ion concentration,
pH value and pOH value.

Answer 1

The solution prepared by dissolving 660 grams of sodium hydroxide in enough water to make a 2.00 liter solution is basic. The pH value of the solution is 0.48.

Step-by-step explanation:

The solution prepared by dissolving 660 grams of sodium hydroxide in enough water to make a 2.00 liter solution is basic. Sodium hydroxide is a strong base that dissociates completely in water to produce hydroxide ions (OH-).

To calculate the hydrogen ion concentration, we can use the equation [H+]=[OH-]=10^-pH. Since the solution is basic, the hydroxide ion concentration is 0.33 M (moles per liter). Therefore, the hydrogen ion concentration is also 0.33 M. The pH value can be calculated using the equation pH=-log[H+]. In this case, the pH is equal to 0.48. The pOH value can be calculated using the equation pOH=-log[OH-]. In this case, the pOH is equal to 0.48 as well.