Posted by Ted (Bangkok, Thailand) on 08/05/2006 | 388 Posts
The amount of ACV needed to react with baking soda to get to pH level of near 6.5-7.0 depends on the brand of ACV. For my own brand of ACV, it is approximately 50 ml-70 ml per one tablespoon of baking soda. So always start on the low side first!
If you are not used to it, try only 1/8 teaspoon of baking soda - the safest possible mixture assuming 2 tablespoons of ACV in a 250 mg water. Then increase slowly as needed.
If you have a pH meter handy, it would be more easier go that way and just add enough until it reaches near pH of 7. It is very much dependent on what brand your ACV is generally. Please note that these are approximate figures.
One more important note!
Warning: if you mix with ACV it will create a lot of bubbles that goes very high! You need to mix inside a large empty pitcher! Also add the ACV very slowly! For me, I don't use ACV here in Bangkok that often because of the price. I just use simple vinegar, so I usually will not have the bubbling issues!