Problem: What volume of a 15.0% by mass NaOH solution, which has a density of 1.116 g/mL, should be used to make 5.05 L of an NaOH solution with a pH of 10.6?

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We are being asked to what volume of a 15.0% by mass NaOH solution, which has a density of 1.116 g/mL, should be used to make 5.05 L of a NaOH solution with a pH of 10.6.


For NaOH:

Any Group 1A metal when combined with OH-, H-, O2- or NH2- makes a strong base
Na (Group 1A metal) is paired with OH-
NaOH → strong base


Since NaOH is a strong base, it will completely dissociate in the solution:

NaOH(aq) → Na+(aq) +  OH-(aq)

Since the pH of the solution is given. We need to compute for pOH to calculate for the concentration of [OH-]. 

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Problem Details

What volume of a 15.0% by mass NaOH solution, which has a density of 1.116 g/mL, should be used to make 5.05 L of an NaOH solution with a pH of 10.6?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Strong Acid-Base Calculations concept. If you need more Strong Acid-Base Calculations practice, you can also practice Strong Acid-Base Calculations practice problems.