Is there a way to test the pH without having to color match? I'm having a hard time being able to distinguish color changes. I have tried it in daylight, artificial light, different backgrounds, etc.
Well, if you had lots of money and you were diligent about cleaning and calibration, you could buy a high-end, 3-point calibration pH probe. They cost somewhere north of $800 and you'll have to factor in probe replacements about once every two years or so depending on how well you keep them....
Or, a cheaper way would be to use your acid demand reagent to see how the color changes with each drop and then count the number of drops it takes to get to the lowest pH color on the scale (yellow).
Perhaps @chemgeek could give us the math for equating number of acid demand reagent drops to pH change.
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