chemist needs a buffer solution of pH 3.90. a. Are formic acid (pKa = 3.74) and its salt sodium formate a pair? good buffer for the purpose of the chemist? Give an explanation! b. What is the ratio of moles of HCHO2 acid to the anion of CHO2 salt needed to make this buffer solution? c. What mass of NaCHO2 (MM = 68 g/mol) will be added to the solution contains 0.10 mole of HCHO2?
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A chemist needs a buffer solution of pH 3.90.
a. Are formic acid (pKa = 3.74) and its salt sodium formate a pair?
good buffer for the purpose of the chemist? Give an explanation!
b. What is the ratio of moles of HCHO2 acid to the anion of CHO2 salt needed to make this buffer solution?
c. What mass of NaCHO2 (MM = 68 g/mol) will be added to the solution contains 0.10 mole of HCHO2?
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