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*^{-}*, O*^{2-}* or NH*_{2}^{-}* 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 _{(}**

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

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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