New answers tagged acid-base
0
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Does hydrogen chloride(HCl gas) react with metals?
I have found no definutive evidence for a reaction of hydrogen chloride gas with metals, but it can react with bases that do not rquire a redox reaction. This answer, citing References [1-3], ...
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How can HCO3- be a weak base while H2CO3 is a weak acid?
Strong and weak are not fixed ideas, but instead try to qualify a spectrum of stronger versus weaker. If you are getting lost in what they mean, switch to using the quantitative description instead.
...
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-2
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Between ortho fluoro phenol and ortho chloro phenol which one is more acidic?
Amongst o-halophenols, o-fluorophenols the weakest acid due to strong intramolecular hydrogen bonding. The acidity of other halophenols decrease as the -I effect of halogen decreases. The acidity of ...
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Can a multimeter be used to measure PH?
You cannot use a multimeter to measure the solution pH. What you could do is to measure it's conductance, measuring AC current going through the solution from AC low voltage ($\le \ \pu{12 V}$) source ...
- 39.2k
4
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Can a multimeter be used to measure PH?
A multimeter measures resistance, i.e., the blocking of electron (or ion) flow. A pH meter measures the voltage difference between glass-encased electrodes.
As you might realize, silica-based glasses ...
- 30.4k
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Why reverse reaction is not possible in the case of dissociation of strong electrolytes and thus non existence of ionic equilibrium?
Certain compounds that are considered ionic as solids can form significant amounts of uncharged (but obviously polar) associated species in water solution, and we can measure equilibria associated ...
- 53.2k
0
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Why reverse reaction is not possible in the case of dissociation of strong electrolytes and thus non existence of ionic equilibrium?
Your thinking is correct. What happens at the extremes of conditions is not understood [or just oversimplified]. Here is a made up example using easy math. Lets give the Ka for a strong acid such as ...
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Why reverse reaction is not possible in the case of dissociation of strong electrolytes and thus non existence of ionic equilibrium?
You seem to be fretting over the definition of strong versus weak electrolytes, the notion of chemical equilibria, and what I'll call exactness.
Let's discuss exactness first. Mathematicians have ...
- 22.3k
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How do I find pH of an extremely low molarity strong acid?
There are two possible questions here, which have very different answers.
Question 1 is what you actually posed here: What is the pH of a solution of nitric acid where $\ce{[HNO3]} = 4.53 \times \pu{...
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5
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Accepted
crystalline form of HCl
As has been mentioned, a compound with a bare hydrogen cation cannot exist. Salts derived from strong acids generally contain hydrogen ion covalently bonded to a neutral molecule, so the charged ...
- 53.2k
0
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Accepted
Production of sulphuric acid
Sulfuric acid is too strongly dissociating to be extracted from water solution in this way.
With sulfuric acid you have complete dissociation for the first stage (in strongly acidic solution) forming ...
- 53.2k
0
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Calculating the pH after adding hydrochloric acid to the potassium hydrogen phosphate solution
I got pH of 7.34, but the answer sheet says 6.97. What did I do wrong?
I'm showing here where you make the mistake as an answer to your above question (If you have already compared your answer to ...
- 39.5k
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Calculating the pH after adding hydrochloric acid to the potassium hydrogen phosphate solution
There is initially $\pu{0.02 L} \cdot \pu{0.2 mol/L} = \pu{0.004 mol}\ \ce{HPO4^2-}$
There is added $\pu{0.01 L} \cdot \pu{0.25 mol/L} = \pu{0.0025 mol}\ \ce{H+}$
This leads to approximately $\pu{0....
- 39.2k
1
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dilution and pH and pOH
If you started with a $\pu{10^{−12.3} M}$ solution of some inert material, then diluting it by a factor of 10 would indeed result in a $\pu{10^{−13.3} M}$ solution.
$\ce{H3O+}$ is not inert. It reacts ...
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1
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dilution and pH and pOH
As Poutnik writes in the comments, the question does not have a single answer unless you specify the components of the solution.
Given that the pH is fairly basic at pH = 12.3, you could guess or ...
- 39.1k
2
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Why this Lewis structure for HNO3 nitric acid is wrong?
The structure isn't incorrect. It just has a high formation energy.
Structure
Heat of Formation ($\pu{kJ mol^{-1}}$)
Reference
236.69
MolCalc
-159.02
MolCalc
Because of the low heat of formation ...
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1
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Why this Lewis structure for HNO3 nitric acid is wrong?
Structures with nitrogen atom bound to several oxygen atoms are generally energy rich, which would be boosted by the stress of three-member ring. Such rings are generally unstable and reactive. Also, ...
- 39.2k
5
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Acidity of metronidazole
As Waylander correctly predict that presence of no acidic groups in metronidazole framework. The reported $\mathrm{p}K_\mathrm{a}$ value is related to the protonated hydrophilic form of the molecule (...
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