Questions tagged [acid-base]
This tag should be applied to questions concerning acid and base reactions. An acid is capable of donating a hydron/ proton (Brønsted acid) or capable of forming a covalent bond with an electron pair (Lewis acid). A base on the other hand is a chemical species/ molecular entity having an available pair of electrons capable of forming a covalent bond with a hydron/ proton (Brønsted base) or with the vacant orbital of some other species (Lewis base).
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Stability of carbenes
For predicting the order of formation of carbenes from the following compounds (CHI3, CHBr3, CHF3), we can take a look at the stability of the halide anion that is formed (I- vs. Br- vs. F-) and the ...
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Why would the theoretical pH not match the measured pH when performing a titration of NH4OH with HCl?
I ran a weak base - strong acid titration experiment using an automatic titrator. I started with an aqueous ammonia stock solution (somewhere in the range of 0.1 - 2.5 wt.%) that was left open to ...
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Irreversible uncharged acid/base indicator
I am conducting a process in an electrochemical cell where at the cathode or anode surface the pH might be acidic or basic. To figure out if either one is correct I would like to find a reaction that ...
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Alkaline + Sweat + heat = cat piss? [closed]
Back in the 70s my Army unit spent three days in the Arizona desert, temperatures reached over 110°, we only told to only bring one set of camouflage fatigue. After the maneuvers we were bussed to the ...
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Why should the pH change when I add sodium hydroxide to water? [closed]
I am a student and I am trying to understand the concept of pH.
If I add pure $\ce{NaOH}$ in water, it leads to the formation of $\ce{OH-}$ ions in the water. But this shouldn't lead to any change in ...
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Non-binding buffer at pKa of roughly 6 that dissolves in ethanol?
I'm trying to find a proper buffer for my experiment, which I'd appreciate some suggestions on. I have a solution in which I want to measure the concentration of magnesium ions using a fluorescent ...
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Why is a basic (not acidic) electrolyte frequently suggested for electrolytic de-rusting of metal or iron objects?
For home or do-it-yourself electrolytic de-rusting of steel or iron objects, the use of a soda-based electrolyte, such as "washing soda" (sodium carbonate) is almost always mentioned.
I have ...
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What is "soda asbestos"?
I found an old bottle labeled "soda asbestos" in the lab. It is a granular material with a grain size of about 0.5 mm. A newer label put on top says "sodium hydroxide".
It is brown,...
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Which one of these is neither acidic or amphoteric? Would the same question be "which one is the most basic?" ? It says that b) is the answer [closed]
I'm stuck on this problem that isn't explained much in the teachers notes (no detailed explanation on why Bi2O3 is the answer).
Google gives mixed answers (it's either basic or amphoteric), and ...
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Calculating the heat of reaction between sulfuric acid and sodium hydroxide
For my lab report I have to calculate the theoretical heat of reaction $\Delta H_{\text{rxn}}$ between sulfuric acid $\ce{H2SO4}$ and sodium hydroxide $\ce{NaOH}$ using their heat of formations. The ...
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How to predict whether a redox or an acid-base reaction will occur? [duplicate]
I've been thinking a lot about this question, but even after intense research, I didn't find any satisfying answer, even here. So here's my question, illustrated with an example:
We have a negatively ...
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Why is Piperidine more basic than Pyridine? [duplicate]
Piperidine, which has sp3 carbons attached to it, experiences an increase in electron density on the nitrogen atom, making it more basic. However, when we look at the resonating structures of pyridine,...
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Why is phosphoric acid a weak acid?
What is the reason for the phosphoric acid $\ce{H3PO4}$ being a weak acid despite having a structure similar to that of sulfuric acid $\ce{H2SO4}?$
I found some sources claiming that the resonance of ...
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TsOH and 5% NaHCO3 Interaction: Unexpected Dark Green Color
Here's the brief:
I synthesized alkyl gallates (ethyl gallate, butyl gallate, and amyl gallate) using Fischer esterification.
I used TsOH instead of concentrated H2SO4 as the catalyst.
After ...
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Why Is HOI a weaker acid than HOCl?
In HOI, the oxygen would be more negatively charged than the oxygen in HOCl because iodine is less electronegative than chlorine. Thus the O-H bond in HOI would be more polarized, which would mean it ...
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