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Question
Calculate the pH for 5×10−5 M Ca(OH)2
Calculate the pH for 5×10−5 M Ca(OH)2
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Solution
The correct option is B 10
Ca(OH)2⇌Ca2++2OH−1 Ca(OH)2 ion gives 2 OH− ions∴ OH− ions concentration=2×(5×10−5)[OH−]=10×10−5pOH=−log10(10×10−5)pOH=−(1−5)=4pH=14−4=10
hence, the pH for 5×10−5 M Ca(OH)2 is 10.
Ca(OH)2⇌Ca2++2OH−1 Ca(OH)2 ion gives 2 OH− ions∴ OH− ions concentration=2×(5×10−5)[OH−]=10×10−5pOH=−log10(10×10−5)pOH=−(1−5)=4pH=14−4=10
hence, the pH for 5×10−5 M Ca(OH)2 is 10.
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