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The ratio is freely selectable whether 1:1 1:4 or 1:10, the thinner the sulfuric acid the more solution is needed to neutralize. Some also use 2 different solutions, at the beginning 1:1 and when nearing pH6 take a thinner solution, because it is easier to adjust the pH6 without overacidification. Keep in mind that the thicker the H2SO4 solution, the greater the risk of temporary acidification, you must add the solution very slowly to avoid this.
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I keep over acidifying... I thought the precipitation would be immediate so I kept adding acid and when I checked it was 1, red. I tried walking it back by adding more acetone but then it started making crystals. At this point in nsonr know what to do start over or filter it. What are the consequences of over acidifying and what can you do to fix it.
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if there is excess of acid probably there is only one way resolve this issue: to do ABE again. simple washing in acetone will not help.