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Grade: 11
        Ph of a mixture of 1 M benzoic acid (pKapKa = 4.20) and 1 M solution benzoate is 4.5. In 300 mL of buffer solution, calculate the moles of benzoic acid in 300 ml bufffer
2 years ago

Answers : (1)

Siddharth Kushwaha
13 Points
							
pH Formula of acidic buffer
 
pH = pKa + log(C/A)
 
4.5=4.2 + log(1/A)
 
Antilog(0.3) = 1/A
 
A = 0.50 M
 
MV = 0.50×0.3
 
= 0.15 moles
one year ago
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