# Questions tagged [ph]

pH (or the potential of hydrogen) is a scale used to measure how acidic or basic an aqueous solution is.

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### Can a multimeter be used to measure PH?

I would like to feed my garden a solution of water and Trisodium Phosphate (TSP), but I am uncertain of the correct amount of TSP to water ratio. Too acidic or too basic of a solution can harm my ...
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### Functional group for glycine that had being titrated (i) HCl (ii)NaOH

i am kinda confused with this question. They asked for the functional group of (i) glycine hydrochloride (ii) glycine that titrated with NaOH. I did take a look many times especially for glycine ...
295 views

### Why should we not add the H+ ion conc coming from water before calculating pH of acidic/basic solution?

For eg: If we are calculating pH of the soln of a strong acid, we shall do this: pH= - log [H+] Where H+ is the concentration coming from that acid. Why shall we not add to this concentration, the H+ ...
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### Why doesn't the volume of NH3 = 325 ml in this problem? [closed]

I'm struggling with the problem below, and don't understand why A buffer solution with pH = 9.0 is to be prepared from a 0.2 M ammonia solution and a 0.15 M $\ce{HCl}$ solution. The sum of the molar ...
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### How to find the deprotonation percentage of an acid?

Given is an aqueous solution of mandelic acid (M = 152.2 g/mol; $pK_a$ = 3.4) with a molar concentration of 0.3 mol/ liter. A $\mathrm{pH}$ value of $2$ is measured for the aqueous mandelic acid ...
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### I tested the effect of temperature on the pH of carbonated water but the results seem to go opposite to what was expected. Could anyone explain?

We carried out an experiment to investigate the effect of temperature on the acid carbonate equilibrium in carbonated water. We tested 5 different temperatures (room temp, 2 above and 2 below) by ...
1 vote
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### Making a reagent preparation simpler that requires pH adjustment

I have a basic question on a reagent (solution) preparation. Here are the steps that I take to prepare the reagent: Weigh the chemical (solid form, ammonium bicarbonate) and dissolve with DW to make ...
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### Calculating acid volumes needed

I collect water quality samples used for irrigation. The samples are sent to a lab to measure $\ce{Ca^{2+}, Mg^{2+}, CO3^{2-}, HCO3^-}$, pH, and total dissolved solids. I need to use acid to prevent ...
1 vote
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### Is it possible to (naturally) change alkalinity without changing pH?

The Bjerrum plot shows how the different species of dissolved inorganic carbon (DIC) are distributed in sea water as a function of pH. The higher the pH, the more carbonate ion, less dissolved \$\ce{...
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### Is there a concise way to calculate pH of a solution after being diluted with water?

I do not have a chemistry degree or even much knowledge in the subject at all. I'm actually an auto detailer and this is why I have an interest in pH levels. All of our chemicals obviously have pH ...
1 vote