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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1answer
27k views

Is Sulfuric hydrofluoric acid a real thing? [closed]

I saw a video on social media of a person disappearing into air when exposed to Sulfuric hydrofluoric acid vapours. I don't have much knowledge in chemistry. Is this possible combination.
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1answer
8k views

Which is more basic: aniline or pyridine? [closed]

Please explain why, thank you very much.
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2answers
78 views

pH of strong acid weak acid mixture [closed]

Question: $\ce{H2S}$ ($\pu{0.1M}$; $K_\mathrm{a} = 1.2×10^{-20} $) and $\ce{HCl}$ ($\pu{0.3M}$) with same volume are mixed together. What is the resultant $\mathrm{pH}$? My approach: Let the volume ...
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1answer
90 views

Is H2PO4- stronger than HCN? [closed]

Wouldn't $\ce{HCN}$ be stronger, since $\ce{H2PO4-}$ predominantly acts as a base in aqueous solution?
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1answer
119 views

How can I dilute 13% Hydrochloric Acid to 5%? [closed]

This is likely too simple of a question, but I just want to make sure I'm understanding things correctly. I have 1 liter of 13% Hydrochloric Acid solution. I need 5% solution. Is it correct that I ...
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1answer
129 views

Would distilling a sodium fluoride solution generate hydrogen fluoride to any noticeable extent?

If you have a solution of NaF, and you boil it (to get pure water by distillation) can the fluoride ions in water separate from sodium ions and combine with hydrogen ions to form HF? ...
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1answer
618 views

What are the products of the double displacement reaction of oxalic acid and cesium hydroxide?

A solution of oxalic acid is mixed with a solution of cesium hydroxide. This chemical reaction requires double displacement. I got this as my chemical equation: $$\ce{C2H2O4 + CsOH -> H3O + CsC2O4}...
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2answers
7k views

Why are ketones acidic?

I have found various sources saying that ketones are acidic (pKa=20), and then relate it to the formation of the enolate ion. However, isn't an enolate ion of a ketone basic due to the oxygen's ...
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2answers
2k views

How to write equations for a reaction of metals with water

Please write two equations for reacting lithium with water and barium with water. Make sure to add the states of matter after each compound. Currently, for lithium I have the equation $$\ce{2Li(s) +...
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1answer
30 views

Acid/Base Indicator [closed]

I'm not sure how the concept and math work on this problem. Can someone show me how you can get the answer, both conceptually and using math?
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1answer
53 views

neutralization of a strong acid with a strong base [closed]

When a 1M H2SO4 is mixed with an equal volume of 1M NaOH, is the mixture acidic, basic, or neutral?
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1answer
135 views

What is meant by acid catalyzed hydration of alkene? [closed]

My teacher told me that acid catalyzed hydration needs acid because h20 is a weak acid and conjugate base of OH- is unstable.Can anyone tell me exactly how this is sure in terms of equilibrium?I don’t ...
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21 views

Acidify H2O with CO2 [on hold]

How many liters of $\ce{CO2}$ per liter of $\ce{H2O}$ are required to reduce the pH of water from 7.8 to 5.8? I am looking into using $\ce{CO2}$ injection as an alternative to acidify my water with ...
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0answers
36 views

Is phosphoric acid is strong acid or weak acid? [duplicate]

Is phosphoric acid is strong acid or weak acid? I read in a book that basicity of Phosphoric acid $\ce{H3PO4}$ is $3$, but besides that it says phosphoric acid is a weak acid. this confuses me. if ...
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1answer
1k views

Finding the pH value of HF [closed]

Find the pH value of HF. $pH = -\log[H+]$ for strong acids $pOH = -\log[OH-]$ for strong bases $pH = 1/2(pKa - \log C)$ for weak acid $pOH = 1/2(pKb - \log C)$ for weak base HF is weak acid so $...
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1answer
57 views

Is it safe to combine these? [duplicate]

It was suggested to me by a co-worker that I could create a very powerful and highly effective weed killer by combining One gallon of chlorine bleach,One gallon of vinegar and One pound of salt. Would ...
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3answers
8k views

Why does dilution reduce the concentration of hydronium and hydroxide ions?

So my teacher gave us the definition of dilution: Mixing of an acid/base with $\ce{H2O}$ to reduce the concentration of $\ce{H+/OH-}$ ions per unit volume. But doesn't mixing an acid/base to water ...
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1answer
310 views

Why do some acids have pH 8? [closed]

Is it necessary for an acid to have pH less than 7? If no, please elaborate with examples.
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1answer
49 views

How does sodium carbonate reduce pH?

Sodium carbonate is used in pools to raise pH. From my understanding, it would dissociate in water like so: $$\ce{Na2CO3 <=> 2 Na+ + CO3^2-}$$ To raise pH, doesn't it have to absorb hydrogen ...
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1answer
213 views

What mass of potassium lactate is needed to 300.0 mL of 0.238 M Lactic acid solution to make a solution with a pH of 4.00? pKa (lactic acid) =3.86

Upon attempt, I've yielded an answer of 11.91g. My calculations do not take 300 mL Lactic acid solution into account, and now I somewhat know the error is at least partially due to the fact that my ...
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2answers
5k views

Order of acidity of water, an alcohol, an amine, and acetylene

What is the order of acidity of $\ce{H2O}$, $\ce{ROH}$, $\ce{RNH2}$, $\ce{C2H2}$? I began by forming the conjugate base of each. The conjugate bases are as follows $\ce{-OH}$, $\ce{-RO}$, $\ce{-RNH}$,...
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2answers
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Why is Sodium acetate called a salt of weak acid and strong base, when Acetic acid acts as a strong acid in Sodium hydroxide soln.?

Why is Sodium acetate called a salt of weak acid and strong base, when Acetic acid behaves as a strong acid (i.e. it shows almost cent percent dissociation) in Sodium hydroxide solution ?
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48 views

production of HCl I have a long question

SO chlorine gas bubbled through water produces HCl acid. Presumably the chlorine ions split open the Hydrogen off the H2O molecule so what happens to the OH- radical produced why doesnt that reduce ...
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1answer
97 views

An acid and Sodium carbonate [closed]

I have to explain why it 'fuzzes' when an acid is added to Sodium carbonate? And what are the relevant Chemical equation(s).. I'm stuck with this question. I'd appreciate some help here. Thanks a ...
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1answer
47 views

Concentration of Carbon dioxide in Blood

Let's say we're able to decrease concentration of carbon dioxide in blood, how will the pH of the blood be affected? My Reasoning : Since blood has approximately 92% water, it is safe to assume the ...
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1answer
217 views

Dissociation of 4-aminobenzoic acid in aqueous solution

I believe that 4-aminobenzoic acid's structural formula is $\ce{C7H7NO2}$ Hence, $$\ce{C7H7NO2 + H2O -> ?}$$ what are the dissociation products of the 4-aminobenzoic acid in aqueous solution ?
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1answer
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Why is NH₄⁻ an anion and NH₃ is not? [closed]

$\ce{NH4-}$ is conjugate acid and $\ce{NH4}$ is conjugate base. $\ce{NH4-}$ is conjugate acid because it has one more Hydrogen. The thing that is difficult for me to understand is why $\ce{NH4-}$ is ...
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3answers
761 views

pH level in human body [closed]

For my alkaline diet, I need to maintain a pH that's above 7, I need to achieve the objective like this: I have eaten 300 g of grapefruit (pH = 13), and eaten 70 g of chocolate (pH = 5,5). What pH ...
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1answer
40 views

Why are there hydroxide concentrations in a solution of a strong acid? [closed]

For example HBr + H2O -> H3O+ + Br- There is clearly no OH- here, but according to the formula [OH-] = Kc/[H+] indicates that there are OH-. Why is this?
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1answer
66 views

Relate phosphamic acid with phosphoric acid [closed]

It is a simple question, but I am not able to figure it out how the formula of phosphamic acid, which is developed from phosphoric acid. In other words, I want to know how to relate it with phosphoric ...
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2answers
34k views

Is there any acid or base which has a pH value under 0 and over 14? [closed]

what is the range of strong acid and base in pH scale.I have much confusion.
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1answer
201 views

HOW STRONG IS ACETIC ACID? [closed]

Will acetic acid cause irritation on our skin? Does it have any specific smell? what is it's pH range? Is it too strong to cause irritation in our nasal passage?
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2answers
596 views

Where on the backbone does a peptide get protonated at low pH?

As a particular example, how does the backbone of a peptide look at $\mathrm{pH}~2$? Where does the backbone get protonated in such an acidic solution? I know that at low $\mathrm{pH}$ the free ...
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1answer
64 views

Reaction of HF in water [closed]

I was wondering, if we put $\ce{HF}$ into a glass of water the acid will be dissolved according to this reaction: $$\ce{HF->F- + H+}$$ Now there is a proton travelling across the water. All $\ce{...
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1answer
110 views

Why do acid base reactions cause the reacting or forming molecules to accelerate? (Basically, why do acid base reactions produce heat?) [duplicate]

My question is hopefully pretty clear, but to rephrase my question: Why do acid base reactions produce heat? We know that heat is merely the transference of momentum (or velocity) between molecules. ...
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1answer
325 views

what is the final concentration of the mixture [closed]

In a bizarre twist of chemical fate, an accident results in you results in you mixing 2L of a 3.00M solution of NaCl with 4L of a 1.50M solution of NaCl. what is the final concentration of the mixture?...
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1answer
1k views

Action of conc H2SO4 on pinacol [closed]

Question: Please suggest the correct answer along with suitable mechanism