Oh chums!
Why have you even opened this thread? Just to mock the totally ignorant, or to be altruistic and try and tell me what Bertie Tanner (chemistry teacher) failed in? Well this is the question I'm looking at:
I'm using a Ritchie acid testing kit. I want to find the %acid in my sample. The wrinkle is I'm looking at acetic acid (mainly) in cider vinegar. Because I'm expecting 5-10% acid by volume, I cut the sample by 1/10th to use 0.5ml of the target liquid (vinegar) - I use a 1ml plastic syringe, so pretty accurate. Into the test tube, an inch of water, 3 drops of indicator, then drop in the peroxide. Exactly 5ml and it goes the wispiest of pinks and stays pink no matter how much I shake it.
So 5% acid, eh? QED...
Or is it?
That's my problem, somewhere I think it says the measure is based on sulphuric acid - so is there the equivalent of 5% sulphuric but a different % acetic? Somewhere I found a table that looked like acetic was 60% strength of sulphuric: does that mean I've got an 8% acetic acid by volume?
Why have you even opened this thread? Just to mock the totally ignorant, or to be altruistic and try and tell me what Bertie Tanner (chemistry teacher) failed in? Well this is the question I'm looking at:
I'm using a Ritchie acid testing kit. I want to find the %acid in my sample. The wrinkle is I'm looking at acetic acid (mainly) in cider vinegar. Because I'm expecting 5-10% acid by volume, I cut the sample by 1/10th to use 0.5ml of the target liquid (vinegar) - I use a 1ml plastic syringe, so pretty accurate. Into the test tube, an inch of water, 3 drops of indicator, then drop in the peroxide. Exactly 5ml and it goes the wispiest of pinks and stays pink no matter how much I shake it.
So 5% acid, eh? QED...
Or is it?
That's my problem, somewhere I think it says the measure is based on sulphuric acid - so is there the equivalent of 5% sulphuric but a different % acetic? Somewhere I found a table that looked like acetic was 60% strength of sulphuric: does that mean I've got an 8% acetic acid by volume?
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