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0.15g of sodium hydroxide (NaOH) pellets are dissolved in water to make 3.0L of solution. What is the pH of this solution?

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M = mols/L
mols = 0.15g/molar mass NaOH.
L = 3.0
pOH = -log(OH^-), then
pH + pOH = pKw = 14
You know pOH and pKw, solve for pH.

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