13,591
edits
Changes
m
added buret size option
* Nitrile or latex gloves. NaOH is a strong base, it will hurt you if you get any on your skin.
* Pipettes and glassware, with precision down to 0.1 mL(25 or 50mL buret <ref>[https://www.facebook.com/groups/MilkTheFunk/permalink/1903175736377298/ Various MTF members. Milk The Funk thread on what size buret to use for titrations. 12/01/2017.]</ref>). Alternatively, you can use a precision scale to dose the base into the beer, if you know the density of both liquids (preferred method).
We need a precise volume of the beer and the specific gravity of the beer. If the specific gravity cannot be measured easily for some reason, then estimating it will be fine for this equation since small differences in specific gravity don't greatly impact the results of the equation. In this example, we have 15 mL with a specific gravity of 1.015. We also need NaOH in liquid form. Typically, it is sold in 0.1M form. Now, the trickiest part of this is adding precise amounts of NaOH (say, 0.1-0.5 mL at time), to your 15 mL of beer. Every time you add NaOH, you must vigorously stir the sample so it is well-mixed. Then you can measure its pH. You continue this until you reach the desired pH baseline of 8.2.