Question
In: Chemistry
What is the pH of a buffer containing 20.53g benzoic acid and 17.23g sodium benzoate in...
What is the pH of a buffer containing 20.53g benzoic acid and
17.23g sodium benzoate in 500mL of solution?
Solutions
Expert Solution
Molarity of benzoic acid = (mass/molarmass)*(1000/V in mL)
= (20.53/122)*(1000/500)
= 0.336
Molarity of sodium benzoate = (17.23/144)*(1000/500)
= 0.239
pH = pKa + log(salt/acid)
= 4.20 + log(0.239/0.336)
= 4.05
queen_honey_blossom answered 2 years agoRelated Solutions
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