2g of NaOH is dissolved in water to make 1L solution. What is the pH of solution?

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10.25

8.256

12.69

10.89

answer is C.

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Detailed Solution

Weight of NaOH dissolved = 2g∴ Equivalent of NaOH dissolved =240NNaOH=240=0.05[OH]-=0.05=5×10-2pOH=-logOH-=-log5×10-2=1.3010pH+pOH =14pH =14- pOH = 14- 1.3010= 12.699

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