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Chemistry

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Answer

12\textbf{12}

Step 1: Determine the concentration of hydroxide ions. Sodium hydroxide (NaOH\text{NaOH}) is a strong base, meaning it dissociates completely in water. Therefore, the concentration of hydroxide ions [OH][OH^-] is equal to the concentration of the NaOH\text{NaOH} solution. Given concentration of NaOH=0.01 M\text{NaOH} = 0.01 \text{ M}. So, [OH]=0.01M=1×102 M[OH^-] = 0.01 M = 1 \times 10^{-2} \text{ M}.

Step 2: Calculate the pOH of the solution. The pOH is calculated using the formula: pOH=log10[OH]\text{pOH} = -\log_{10}[OH^-] Substitute the concentration of hydroxide ions: pOH=log10(1×102)\text{pOH} = -\log_{10}(1 \times 10^{-2}) pOH=(2)\text{pOH} = -(-2) pOH=2\text{pOH} = 2

Step 3: Calculate the pH of the solution. The relationship between pH and pOH at 25C25^\circ\text{C} is: pH+pOH=14\text{pH} + pOH = 14 Rearrange to solve for pH: pH=14pOH\text{pH} = 14 - \text{pOH} Substitute the calculated pOH value: pH=142\text{pH} = 14 - 2 pH=12\text{pH} = 12

The final answer is 12\boxed{12}.

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