What is the molarity of NaOH, if 15g of NaOH is mixed with 600mL?

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02-06-2017
Chemistry

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What is the molarity of NaOH, if 15g of NaOH is mixed with 600mL?

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dec77cat dec77cat · Answer 1 · 2017-06-02T20:54:04+02:00

dec77cat dec77cat

02-06-2017

m(NaOH)=15 g

v=600 ml=0.6 l

n(NaOH)=m(NaOH)/M(NaOH)

C=n(NaOH)/v=m(NaOH)/[M(NaOH)v]

C=15g/[40g/mol*0.6 l]=0.625 mol/l

0.625M

[H⁺]=7.5*10⁻²
pOH=14-pH=14+lg[H⁺]
pOH=14+lg(7.5*10⁻²)=14-1.125=12.875

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