I need to prepare solid solution at pH 11 that initial pH is 1-3. It can be controlled by addition of hydroxide.
So I want to know how much I need as hydroxide volume pH until desired.
There are two ways: you can either calculate the required pH by equations, or you can just use pH-meter apparatus or pH-indicators (like litmus paper). For first method you will be required to use equations like Handerson Hasselbach and like. But from your question I understand that you don't know the starting pH, thus I'd advise you to use the second method. By that way you can select an indicator, that changes the color at pH=11, so that you could know how much of the basic OH solution you have to add.
By the way I'm not familiar how you measure/calculate OH or H ions in a solid solution. It should be dissolved in a liquid solution for you to be able to measure the ions in it. Are you using solid-state pH electrodes?
Second method is very good know. I will concentrate on that method to study new thing.
I made a fault. Its not solid state just water solution.
When i do my experiment i need to measure many solutions pH where i lost a lot of time on there. So if i know how much i need to add into the solution its very good to save a time. Hence, i wanna study this kind of method.
Thank you for your answer and to share your knowledge.
No problem at all. Also, if your solution is liquid, I'd also advise you to use pH-meter devices, rather than ph indicators. By their electrodes, you can find exact number of pH to two-three decimals. You immerse the elecrode into solution, and stir the solution continuously (via stirrer). Then, you add base solution (NaOH, KOH) dropwise by pipette of known volume. That way you can detect the pH of solution immediately and very sharply, and also can find how many mL of base have you added.
I used pH meter and when i dropped base solution by pipette i was checked base volume as how much it was dropped into the solution. Then that noted volume was useful to do my experiment.
Actually, I m poisoned by base smell ohhhh
Thank you again.
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