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 is on the other hand a chemical species/ molecular entity having an available ...

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0
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2answers
34 views

Write a Net Ionic Equation to Represent the Reaction of Aqueous Ammonia with Propionic acid

I would like to know how do I begin to solve a problem like this? That is finding the formula equation? I would assume that it would be $$ \ce{NH3 + CH3CH2COOH -> NH3 + CH3CH2COOH + H2O} $$ I ...
0
votes
1answer
11 views

When mixing lye and citric acid, which citrate will form?

I'm trying to combine precise amounts of citric acid and lye to get sodium citrate with minimal amount of reacted acid/base. I'm not so sure how stochiometry works, but I could sure learn that from ...
0
votes
0answers
24 views

Equilibrium involving ions [on hold]

Is NaH2PO4 a buffer? If so, how? A solution contains 20 mmoles of H3PO4 and 10 mmoles of NaH2PO4. How many mmoles of NaOH must be added to convert all the phosphate to HPO41-ions?
-4
votes
0answers
43 views

Acid rain and the Greenhouse effect [on hold]

a) Coal contains sulphur. Write equations to show what happens when I. Coke burns in oxygen and the products react with water. II. Sulphur burns in oxygen and the products react with water. b) ...
-4
votes
0answers
33 views

You carry out a titration on soda water and rainwater and achieve the following results: [on hold]

15cm3 of 0.01M NaOH reacts with 25cm3 soda water and 25cm3 of 0.01M NaOH reacts with 225cm3 rainwater. Using this data – find the impact of sulphur in coal on the environment. Evaluate the validity of ...
7
votes
2answers
1k views

If caffeine is an alkaloid, why is coffee acidic?

I have just put together on my mind these two facts: caffeine is an alkaloid and brewed coffee is slightly acidic (pH = 5). My Biology teacher and my Chemistry teacher could not elaborate satisfying ...
-1
votes
0answers
22 views

How do I determine the Ka using an ICE chart of an unknown acid titration using NaOH

two trials were ran using 10 mL of an unknown acid into a NaOH solution until the pH reached equivalence (pH of around or as close to 7). Using this data, I have made two graphs and I am supposed to ...
2
votes
2answers
39 views

Why do acids ionize in solution if they are covalently bonded?

Maybe I am wrong, but I thought acids were covalently bonded since hydrogen doesn't form ionic compounds. For example, wouldn't $\ce{HCl}$ look like: Since the electrons are shared, why does it ...
6
votes
3answers
327 views

Why are weak acids weak?

What are weak acids? My chemistry and biology class's skimmed over them briefly but nothing in depth. I understand that an acid is weak if it partially dissociates and breaks down into ionic ...
1
vote
3answers
63 views

How do you explain pKa to non professional?

Let's say we have substance A which was mixed with substance B to improve shelf-life because pKa of the substance A is 7.9 and in mix the pH is 5.2. Does this mean that in the solution with pH near 8 ...
3
votes
1answer
36 views

Find the initial volume of the weak acid given a titration graph

Question Below is a picture of a titration between a weak acid, $\ce{HA}$, and a 0.150 M $\ce{NaOH}$ solution. Find the initial volume of the weak acid in millilitres in this titration. My work ...
3
votes
2answers
70 views

What makes protons give the property of acidity?

Bronsted Lowry definition of an acid says that an acid gives away protons. What I don't understand is what makes dissolved protons grant the property of acidity? Like, why would dissolved protons eat ...
10
votes
3answers
3k views

Which is the strongest acid?

According to Wikipedia $\ce{HeH+}$ and Fluoroantimonic Acid are the strongest. According to Nature, Carborane acid is the strongest, but Wikipedia says fluoroantimonic acid is stronger... Links: ...
7
votes
1answer
144 views

Which is more basic, hydrazine or ammonia?

Which of the following will be more basic, hydrazine $\ce{H2N-NH2}$ or ammonia $\ce{NH3}$? My chemistry teacher said that $\ce{NH3}$ is more basic since after giving $\ce{H+}$ to hydrazine results in ...
0
votes
1answer
15 views

Ionic Equilibrium

Calculate the pH of a solution which contains 100mL of 0.1M HCl and 9.9mL of 1.0M NaOH. While calculating the concentration of H+ ions, why shouldn't we consider the H+ ion concentration from water?
2
votes
1answer
50 views

Alkyne formation from vicinal dihalide

Why must 3 equivalents of sodium amide be used here to form the alkyne? The part I specifically have issue with is in red. From what I understand, we should just use 2 equivalents of sodium amide to ...
4
votes
1answer
80 views

Which proton is more acidic in this compound?

I'm having trouble determining which of these protons is more acidic. I was thinking the solution had something to do with the double bond in the aromatic ring, but I'm still not sure. If anyone can ...
1
vote
0answers
20 views

Degree of dissociation of strong electrolytes in concentrated solutions of ionic substances

Why is the dissociation of strong electrolytes complete in very dilute solutions of ionic substances but less likely to be so in more concentrated solutions? Before seeing this, I thought a strong ...
3
votes
2answers
69 views

Interesting ionization of sulfuric acid

I just need an explanation of why it is a strong acid in its first ionization and a weak acid its second ionization. It becomes $\ce{HSO_4-}$. From what I have learned about oxoacids, the bond ...
5
votes
2answers
102 views

What is the word for how polyprotic an acid is?

What is the word to describe the number of acidic hydrogens an acid has? I am currently thinking something like "proticity", but I am not sure The use case world be for a table of things like this: ...
2
votes
1answer
38 views

Finding rate of acid - base reaction

Given the reaction between $\ce{CH_{3}COOH_{(l)}}$ and $\ce{NaHCO_{3_{(s)}}}$ which happens in same pressure but in different temperatures, is there any way to mathematically compare between the rate ...
0
votes
1answer
57 views

Material that doesn't melt at 800 deg F, but can be dissolved?

I'm a sculptor and I have a chemistry/plastic question. I thought here would be a good place to ask. I'm looking for a substance (probably a plastic) that has these characteristics: 1- Doesn't melt ...
0
votes
1answer
29 views

Acid-Base Neutralization [duplicate]

What is the net ionic equation for the reaction between phosphoric acid and sodium hydroxide? is it 1)H+ + H2PO4- + OH- -----> PO4-3 + H2O or 2) H+ + OH- -----> H2O
8
votes
1answer
550 views

Why is proton transfer so fast?

Why is proton transfer always kinetically favored? In other words, why are Bronsted acid-base reactions so quick? Is it because protons are generally unhindered, sterically? This seems plausible; ...
1
vote
0answers
31 views

pH of calcium carbonate in ammonium chloride solution (theoretical; not a calculation question)

Consider calcium carbonate saturated in 1.0 M ammonium chloride solution. I have calculated the pH of this solution analytically (with mass and charge balance) to be 6.92. Now, how would the actual ...
3
votes
1answer
60 views

pH of a buffer solution calculation

Calculate the pH of a mixture of $75\text{cm}^3$ of methanoic acid solution of concentration $0.10\text{mol dm}^{-3}$ and $75\text{cm}^3$ of sodium hydroxide solution of concentration $0.050\text {mol ...
1
vote
1answer
61 views

Conductance and Conductivity of acid base titration?

I have a question with NaOH initially present with given concentration and conductivity, then an equal volume of given concentration of HCl is added and the final conductivity is given, again a same ...
3
votes
2answers
78 views

Why can't this be used as a buffer solution?

Explain, using a chemical equation to aid your answer, why a mixture of $50~\mathrm{cm^3}$ of $0.10~\mathrm{\frac{mol}{dm^3}}$ ammonia solution and $50~\mathrm{cm^3}$ of ...
2
votes
1answer
23 views

Corrosiveness of Acid

Is the corrosive nature of acid relative to some substance quantifiable like acid dissociation constant (Ka)? If yes, what can be used to describe the corrosive nature of an acid? For example, it is ...
0
votes
1answer
62 views

How could the pH of this solution rise instead of fall when exposed to the atmosphere?

I have a couple of big barrels with a 50L demi-water solution of the following nutrients: $$ \begin{array}{rl} 200~\mathrm{\mu M} & \ce{NH4NO3} & +\\ 30~\mathrm{\mu M} & \ce{KCl} & ...
6
votes
3answers
68 views

Could neutralisation of safe chemicals produce dangerous ones?

I'm basically thinking whether I could potentionally poison myself while neutralising strong acid/base by some weak base/acid when I accidentally spill it, touch it or when I'm cleaning reaction ...
1
vote
1answer
48 views

Grocery store crystalline citric acid

Which type of citric acid crystalline powder do they sell in grocery stores? Is the concentration of citric acid in the crystals 100%?Is it anhydrous or a monohydrate?
1
vote
1answer
36 views

carbonic acid reaction

is it possible that if we blow water (hot/cold) can cause a bond between CO2 from expiration and H2O of the water, and say, maybe become H2CO3? Is H2CO3 a dangerous component? Thx, iccang-Indonesia
2
votes
1answer
46 views

Acidity of ester and benzoic acid

Can the oxygen in an ester participate in resonance donation? I think so, although the donation is slight. The hybridization is correct. However, resonance withdrawal by the ring via the oxygen ...
2
votes
3answers
70 views

Acidities of amines and carboxylic acids

I have been told that the first of the two acids is the stronger acid. According to this person,deprotonation for both occur at the nitrogen.The resulting conjugate bases include,respectively a ...
0
votes
1answer
25 views

Basicities of meta-nitrophenoxide and para-nitrophenoxide

The negative oxygen is the site of protonation. Size and EN are the same for both oxygens. We are mainly looking at resonance (and possibly inductive) effects here. We want the least resonance ...
1
vote
2answers
67 views

How does alkaline hydrolysis of peptides occur?

I have been learning about zwitterions and the isoelectric point, and have been trying to apply this to hydrolysis of peptides. From the diagram in my textbook, I can see that when acid hydrolysis ...
1
vote
1answer
40 views

What happens to the amino acid when it is in a solution with the pH of its isoelectric point? (zwitterions)

I am learning about zwitterions and am confused about the following: From what I understand, when amino acids are in their solid form, they exist as zwitterions which is why they have such a high ...
0
votes
1answer
79 views

Removing HCl from water

I have water contaminated with dissolved chlorine: $\ce{H2O + Cl2 <=>HCl + HOCl}$ During electrolysis, this is an issue. These are my products: $\ce{NaCl + H2O ->T[electrolysis] NaOH + Cl2 ...
5
votes
1answer
41 views

What happens when 0.02 mole NaOH is added to a buffer solution?

I am asking this question for my son. (This question is related but we still have our confusions.) We have one liter buffer solution of 4.74 pH which contains 0.1 mole $\ce{CH_3COOH}$ and 0.1 mole ...
4
votes
1answer
176 views

Is the Ocean acidification inconsistent with the Bjerrum plot?

$\ce{CO2}$ dissolves in water and goes through chemical reactions and exists at different concentrations of, dissolved $\ce{CO2}$, carbonic acid, bicarbonate, and carbonate. The Bjerrum plot ...
4
votes
1answer
112 views

Adjusting PBS with HCl: pH drift after dilution of phosphate buffer

It is some kind of everyday lab science and with a feel of shame I cannot answer this observation. I noticed a pH drift (~0.5 units) of my 10X phosphate buffer (PBS), when I adjust the pH with ...
1
vote
0answers
11 views

Enzyme Assay - pectinase

I am working on Enzyme Assay.I assayed the enzyme in different buffers from $pH\ 1-12.5$ However,the enzyme has good activities starting from $pH\ 1-10.5$ Is that possible to have enzyme activity in ...
1
vote
1answer
60 views

Why can't organic acids be concentrated and used like concentrated sulphuric acid, etc?

Is it possible to make organic acids concentrated like inorganic acids like concentrated sulphuric acid, etc?
3
votes
0answers
15 views

Dissolving Time Function for Concrete

So I was just exploring some ideas on my own and am having trouble analytically solving the following: Let $D(n,m,T)$ be the time it takes to dissolve an n x n x n cube of concrete in m molar HcL at ...
0
votes
2answers
57 views

How to separate HCl and NaOH from an aqueous solution of NaCl?

At home I make experiments on salt (as it is easily available at home). One day I came to know that on mixing salt and water I will get Hydrochloric Acid and Sodium Hydroxide. So I became really ...
2
votes
2answers
207 views

Why does alcoholic KOH prefer elimination whereas aqueous KOH prefers substitution?

What is the basic difference between aqueous and alcoholic $\ce{KOH}$? Why does alcoholic $\ce{KOH}$ prefer elimination whereas aqueous $\ce{KOH}$ prefers substitution?
1
vote
1answer
60 views

Explaining Ba(OH)2 as a base?

It is well known fact that Barium Hydroxide is a base. How does the Brønsted-Lowry concept explain $\ce{Ba(OH)2}$ as a base? Is it that $\ce{Ba(OH)2}$ first accepts a proton then leaves behind ...
2
votes
2answers
73 views

Water as a strong Base

Question: Classify each of the following ions according to whether they react with water to give a neutral, acidic, or basic solution: As a general rule: Strong acid + Strong base ...
1
vote
2answers
165 views

Why is formic acid a stronger acid than acetic acid?

I am told that because the methyl group is electron donating in the conjugate base of acetic acid, this destabilizes the conjugate base by exacerbating the existing negative formal charge on the ...