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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Calculate the pH of a buffered solution after adding strong acid [closed]
Calculate the pH of a solution formed by the addition of $0.0020$ moles of $\ce{HCl}$ to $\pu{100.0 mL}$ of $\pu{0.200 M}$ $\ce{CH3NH2}$/ $\ce{0.100 M CH3NH3Cl}$.
$K_\mathrm{b}(\ce{CH3NH2})=4.4\times ...
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which is more acidic thiols or carboxylic acid?
According to me as the key atoms are different so when the h+ is released and each of them gets a negative charge as sulphur is a bigger atom compared to oxygen charge is more dispersed , hence the ...
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Effective pH range in water. What is the definition
https://openchemistryhelp.blogspot.com/2013/02/solvent-levelling.html
I learned the concept of solvent theory and solvent leveling of acid and base,but couldn't understand what the graph below says
I ...
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Equilibrium Solubility of CO2 in Aqueous Solution and its Dependence on H3O+ Concentration
The equilibrium solubility of $\ce{CO2}$ in an aqueous solution is given by three chemical reactions:
$$
\begin{align}
\ce{CO2(g) &<=> CO2(aq)}\label{rxn:R1}\tag{R1}\\
\ce{CO2(aq) + H2O &...
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Relationship of acids and bases with pH. (Proportional Relationship) [duplicate]
Can someone please clarify the relationship between acidic-basic strength and pH? I have come across conflicting information and am unsure about the correct understanding.
Some people including my ...
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Do peroxy acids such as peroxynitric acid have anhydrides?
Anhydrides reversibly react with water to form a respective acid or base. For example, $\ce{CO2}$ is the anhydride of $\ce{H2CO3}$:
$$\ce{CO2 + H2O <=> H2CO3}.\tag{R1}$$
Acidic anhydride can be ...
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Can acids contain OH-? [closed]
Given that a solution contains $\ce{OH-}$ ions can we sufficiently determine the substance is a base? From my understanding, an acid may still contain $\ce{OH-}$ ions. However, the concentration of $\...
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How to achieve highest CO2 pressure from acetic acid + sodium bicarbonate reaction?
I'm planning to make a high-end vinegar + baking soda rocket and started doing some researches for the best ratio of the reagents's concentrations to achieve maximum pressure. Furthermore, I know that ...
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How to neutralize 60L of a 2% Aqua Regia with Various Metals suspended
I am encountering an issue in my laboratory. My supervisor and I are currently faced with the task of neutralizing a volume of 60 liters of Aqua Regia, which contains suspended metals, at a ...
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Why Is Hydrogen in HSO3- Connected to Oxygen Instead of Sulfur?
One of the questions in my homework was to draw $\ce{HSO3-}$, which I thought to be pretty easy. Sulfur is the least electronegative (except hydrogen but it can't be the central atom), hence it is the ...
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What are the dissociation constants of hydronium and hydroxide ions? [duplicate]
Context
The answer to How to calculate Ka for hydronium and Kb for hydroxide?, water was regarded as solvent once and base (or equivalently acid) once while citing Reference 1 (1986) and made no ...
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What is the pH of acetone in water?
Reaction of Acetone with Water
Acetone in water can react in three ways:
The different reactions change the concentrations of $\ce{H+}$ and, consequently the pH, differently. My question is what is ...
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Small amount of sulfuric acid down drain - questions [closed]
Bought some drain cleaner from my local hardware store, the guy at the counter said its powerful stuff that barbers use to clear hair from drains. Said to not put my head above the drain while using ...
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Hydrogen Isotopes and Bronsted Lowry Acid
a Bronsted Lowry Acid is defined as an acid that donates a proton. However it's actually a Hydrogen Ion, since hydrogen only has 1 proton and 1 electron, a positive Hydrogen Ion would have no electron ...
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Why is fluoroantimonic acid so unique?
Fluoroantimonic acid is the strongest acid because its conjugate base $\ce{SbF6-}$ is exceptionally stable. $\ce{SbF6-}$ is in perfect octahedral symmetry wherein the negative charge is equally shared ...
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Determine the pKa of a diprotic acid by titration (if pKa1 is similar to pKa2)
Determining the acidity constants of a diprotic acid (in my case, tartaric acid) by titration with NaOH and pH-meter is not possible if pKa2 - pKa1 < 2.
This is because there are no "pH jumps&...
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What is produced from chromium, HCL and NH3
I wanted to see if I could get a chromium salt from stainless steel, so I put the stainless steel in HCL, turning the liquid green. Then I mixed the result with ammonia, and a green solid precipitated ...
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How does sodium react with methanol?
Strong acids of $\ce{AH}$ type readily dissociate to its constituent ions (considering the solvent is water): $\ce{A-}$ and $\ce{H+}$. But the mechanism of the reaction between sodium metal and ...
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How does sodium diacetate turn into two acetic acid molecules?
I'm trying to replace vinegar with sodium diacetate in a recipe, and I would like to understand better what is happening from a chemical point of view.
What I imagine happens when I add sodium ...
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Why does phosphinic acid not form pyroacids?
Why does $\ce{H3PO2}$ not form pyroacids? All I know is pyroacids are derived oxyacids obtained by removing one $\ce{H2O}$ molecule from two molecules of oxyacids. Correct me if this is wrong.
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Ductless fume hood for dissolving aluminum foil in hydrochloric acid
I work at a food manufacturing plant and we use Tetra Pak packaging for our liquid foods. There is a layer of aluminum foil within the packaging material that we need to dissolve out of the package in ...
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Powder left everywhere after solution was left to evaporate. What could it be?
I dissolved a coin made of silver and copper and probably other metals in nitric acid. I neutralized the solution with some sodium hydroxide and then added salt(NaCl) to make Silver Chloride. A white ...
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Does anybody know anything about this patented, late-19th-century process for producing white lead?
I debated on whether to put this question in the History or Engineering Stack Exchange. Ultimately, I decided on the Engineering Stack because I believe the people on this site will understand the ...
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What is the math behind the formula for the concentration of the strong titrant when calculating theoretical buffer capacity of a diprotic system?
I have a question related to finding the theoretical buffer capacity of a diprotic system, specifically about the formula for the concentration of the strong titrant. In this post:
What is the formula ...
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What is alkalimetry?
I've found two answers. One says its the determination of concentration of unknown alkali solution with the help of standard acid solution.
The other says it as the determination of concentration of ...
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Successive deprotonation - how far can it go?
It has been written that among the equilibria of the dissolution of $\ce{SO_2}$ in water, the dissociation of sulphur dioxide into $\ce{HSO_3^-(aq) + H_3O^+(aq)}$ is a complete dissociation. See the ...
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Does Peracetic Acid react with nickel to create Nickel (II) Acetate?
I am planning to create a solution of nickel (II) acetate to use for electroplating. From my research, I found that peracetic acid (which I am using to make copper (II) acetate by placing copper wire ...
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Side reaction of I− and acidity of HI
In acidic conditions, I− tends to get oxidised by atmospheric oxygen to give iodine. This is evident in iodine based titration, where upon leaving the setup, blue colour of starch reappears as iodine ...
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How to make NH3 + H20 favor its products (NH4+ and OH-) [closed]
I am putting together a (fake) proposal for a process that would convert ammonia in cow manure into elemental nitrogen. The first step includes the conversion of that ammonia into ammonium so that it ...
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pH of a mixture of a weak acid and a different (non-conjugate) weak base
Let's say I have 1000 ml 1 M acetic acid ($\mathrm{p}K_\mathrm{a}$ = 4.76) and add 1000 ml 1M aniline ($\mathrm{p}K_\mathrm{aH}$ = 4.65). To what proportion is aniline protonated?
1M acetic acid has a ...
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