how the calculation?
what salt use?
how to apply Handerson Hansberg equation?(not so sure this spelling)
2007-02-23 14:48:19 · 2 answers · asked by balqis 1 in Science & Mathematics ➔ Chemistry
You need to mix ethanoic acid with sodium ethanoate. If you mix them 50/50 (equimolar) you will get a pH of 4.76, so you need a bit more sodium ethanoate than ethanoic acid. You can calculate the ratio of concentrations by the following:
1.0 x 10-5 = 1.75 x 10-5 x [acid]/[salt]
Then you can convert those molarities to actual masses.
2007-02-23 23:28:46 · answer #1 · answered by Gervald F 7 · 0⤊ 0⤋
pH = pKa + log[A-]/[HA] pKa for acetic acid is 4.seventy 9 If [HA] = 0.05 and pH = 3.24 3.24 = 4.seventy 9 + log[A-]/0.05 log[A-]/0.05 = -a million.fifty 5 [A-]/0.05 = 0.0282 [A-] = 0.0014 while you're making 1L of buffer, initiate with 1L 0.05M acetic acid and upload 0.0014 mol ( 0.11g) sodium acetate
2016-12-14 04:22:22 · answer #2 · answered by trip 4 · 0⤊ 0⤋