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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2answers
39 views

Identifying base in a chemical equation

According to the Bronsted Lowry principle, "base" is a proton acceptor. I've tried to apply this idea to every choice as you can see these red circles in each equation below, but they are all loses ...
3
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2answers
142 views

Is the concentration of negative ions always equal to that of positive ions?

Is there any way in which a solution can have more negative charge than positive charge, or vice versa? For example, in the context of acid-base chemistry, is there any scenario in which ...
2
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1answer
39 views

Does the addition of water to N2H4 produce N2H4

I am currently calculating the $\ce{pH}$ of a species. The reaction is as follows, $$\ce{N2H4 + H2O <=> N2H_{$A$}+ + OH-}$$ However, I'm not sure what the value of $A$ will be. In my ...
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1answer
23 views

Sodium fluoride and varying pH - HF risk

I'm looking into conducting an experiment on the adsorption of fluoride (for my International Baccalaureate Extended Essay). As I will be investigating the role of $\mathrm{pH}$ in adsorption ...
3
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2answers
36 views

Zwitterions/IEP of glycine at pH 6? (Paradox?)

I am trying to understand an experiment: Some crystalline, solid glycine was solved in water and a pH=6 was measured (also calculable with $\mathrm{pH} =\frac{1}{2}(\mathrm{p}K_\mathrm{a1} + ...
-3
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2answers
42 views

pH of Strong Acid (and why it seems like it should be zero)

I understand the Henderson-Hasselbalch equation for acids that do not completely dissociate but I am having trouble calculating the pH of a strong acid using the equation: for example a .25 m ...
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0answers
8 views

Would a dilute solution of formic acid react with bleach to form chlorine?

Would a dilute solution of formic acid react with bleach to form chlorine? How does it compare to chlorine formation when dil HCl reacts with bleach?
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0answers
38 views

Sodium percarbonate and sulfuric acid reaction

If an excess sulfuric acid is added to a detergent containing sodium percarbonate, would it be possible for the excess acid to react with hydrogen peroxide? I believe that the hydrogen peroxide will ...
0
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0answers
23 views

Neutralization of sodium percarbonate

At the moment, I have been asked to improve the methods given in my experiment to increase the efficiency of the results. One of the steps I am currently looking at is the neutralization of sodium ...
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0answers
15 views

colligative properties 2 [closed]

An unknown molecular solution has a freezing point of (- 1.460 C). How many grams of this molecular compound were added to 100.0 grams of water to create this solution? Kf (H2O) = 1.86 0C/m. Show the ...
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2answers
79 views

How to work out equations with period 3 oxides?

I know the general equation of reacting an acid with a base to be the salt and water, but I am not able to apply this to the following equations. So in what way can I derive the end product if I have ...
0
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1answer
33 views

Ka calculation confusion

(My assumption may be wrong so kindly explain me in simple terms). First of all I have learned that $K_\mathrm{a} = \frac{[\ce{H+}] [\ce{A-}]} {[\ce{HA}]}$ . Also I have been informed that ...
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0answers
35 views

Determining concentration of salts of polyprotic buffer solution

I'm looking into making a formula for making citric acid buffer solution from citric acid monohydrate ($\ce{C6H8O7.H2O}$) and sodium citrate $\ce{C6H5O7Na3.2H2O}$, with adjustable pH and molarity of ...
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0answers
13 views

HYDRATION OF ACIDS AND THEIR DILUTION [duplicate]

Please tell me why do we add an acid to water and not water to acid ? I was told by my teacher that dilution of acis is due to their hydration and acids dissociate into H+ ions which combine with ...
0
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0answers
12 views

Preparing Zwitterionic Buffer

I am trying to prepare multiple zwitterionic buffer solutions at pH 7.4. Examples include many of the following "Selected Biological Buffers" in the first table in the following link: ...
0
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1answer
37 views

pH of aqueous HCl

Calculate the $\mathrm{pH}$ of a pure water in which it was added $\ce{HCl}$. $10^{-6}$ is the final concentration of $\ce{HCl}$. So what I did was to add the concentration of $\ce{H3O+}$ in ...
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votes
0answers
40 views

Which is a stronger base, methylamine or ethylamine? and why?

I think it is because of inductive effect. But not really sure. The pushing of the electron cloud towards the Nitrogen atom increases the energy of the lone pair of the nitrogen due to repulsive ...
0
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0answers
11 views

WORKING OF PH PAPER IN AN ACIDIC OR BASIC MEDIUM [duplicate]

Please elaborate and tell me how does a ph papar work. How does it tell whether it is an acid or a base. I was told that it acts to the presence of hydronium ions and hydroxide ions. Please explain ...
0
votes
2answers
61 views

What are the products formed when CH3CH2OH reacts with NaH?

When $\ce{CH3CH2OH}$ reacts with $\ce{NaH}$, why are the products $\ce{CH3CH2ONa + H2}$? Why not $\ce{CH3CH3 + NaOH}$? Can you please explain in detail?
3
votes
2answers
402 views

Is ammonium a strong or weak conjugate acid?

Ammonium, $\ce{NH_4^+}$, is the conjugate acid of ammonia, $\ce{NH_3}$. I have searched the Internet and so many different answers pop up. The rule of thumb that I read was that a strong acid has a ...
3
votes
1answer
355 views

Can hydrofluoric acid etch glass at a pH of 7.0?

Will it still etch glass when very dilute? Will the reaction still proceed slowly? At what pH will the reaction stop completely? "Although hydrofluoric acid is regarded as a weak acid, it is very ...
0
votes
1answer
51 views

After opening, when is a can of Diet Coke most acidic? (Based on a true story)

Situation: Clogged toilet, no plunger. Goal: Trying to use the acidity from a can of Diet Coke as toilet drain cleaner. Question: How can I maximize the acidity of a Diet Coke? Question 1: Should I ...
2
votes
2answers
67 views

Is nifedipine a weak base or weak acid?

I was wondering whether someone could explain me if nifedipine is a weak base or a weak acid. I barely can find any information about nifedipine's physicochemical properties in studies, however some ...
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votes
1answer
35 views

How pH paper works [duplicate]

Please tell me how a pH paper works. How does it decide whether the solution is an acid or a base on the basis of ions formed and how it can determine its concentration. How does it indicate an acid ...
8
votes
1answer
639 views

Weird Wikipedia Section on Oxidizing Behavior of Nitric and Sulfuric Acids

It has been my understanding that when nitric, perchloric, or sulfuric acids act as oxidizing agents, they must exist as whole $\ce{HNO_3}$ or $\ce{HClO_4}$ or $\ce{H_2SO_4}$ molecules that are still ...
1
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0answers
23 views

why are amines more soluble than alcohol for similiar molecular weight?

kindly someone please explain the reason behind this behaviour despite the fact that oxygen is more electronegative and forms stronger hydrogen bond.
6
votes
3answers
122 views

Clear definition of a 'non-oxidizing acid'?

From the Beryllium article on Wikipedia: Beryllium dissolves readily in non-oxidizing acids, such as $\ce{HCl}$ and diluted $\ce{H2SO4}$, but not in nitric acid or water as this forms the oxide. ...
1
vote
2answers
47 views

Why does milk clot while making yogurt?

Why does milk clot when it becomes yogurt? Is it only because of the decrease in the $\mathrm{pH}$ of milk? If it does so, what is happening when I increase the $\mathrm{pH}$ level? And by decreasing ...
2
votes
1answer
34 views

Competitive protonation between alkene and carbonyl

Given this compound in an acidic medium, what would get protonated first? Would the double bond not get protonated preferentially, since oxygen is more electronegative than carbon and less willing ...
1
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2answers
95 views

Why isn't CH3OH the most basic if it contains OH?

I was asked to find the most basic solution from the following: $\ce{K2SO4}$ $\ce{CH3OH}$ $\ce{Na2CO3}$ $\ce{(NH4)2CrO4}$ $\ce{BaCl2}$ I know that I have to identify the solution that ...
3
votes
2answers
92 views

Combining acid dissociation constants to determine pH of diprotic acid

If I have a diprotic acid with $K_{\mathrm{a1}}$ and $K_{\mathrm{a2}}$ as the acid dissociation constants, why can't I calculate the final $\mathrm{pH}$ using $K = K_{\mathrm{a1}}\cdot ...
0
votes
1answer
19 views

How can you change the proportions of reactants and products at equilibrium if Le Chatelier's principle is occurring?

For example, how could you make a buffer with equal concentrations of acid and conjugate base? If you add more conjugate base, it will shift the equilibrium to form more acid, which will keep the ...
0
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2answers
46 views

Acid/Base strength conceptual question [duplicate]

Is this statement true or false? HCl is a stronger acid than HF because F is more electronegative than Cl. Please explain. I'm thinking this is true. The reason being is that since F is more ...
1
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0answers
19 views

Air drying acetic acid solution

So I'm cleaning up a lot of my stuff to have more space and I have 2 jugs of grocery bought white vinegar jugs (5% acetic acid). Naturally to make it more compact, I'm trying to concentrate it. I was ...
1
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1answer
84 views

Why do acids mix in water faster than bases?

I have $100\ \mathrm{L}$ of water in a tank with an mixer inside and want to know how fast the tank mixes at a given rpm-setting. I am adding $50\ \mathrm{mL}$ of $2\ \mathrm{N}\ \ce{HCl}$ and see ...
1
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0answers
22 views

Why is aluminium nitrate an acidic salt? [closed]

when this salt dissociates, Al 3+ will change the pH of water. why? Thank you.
0
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0answers
18 views

knowing that a strong base is a strong electrolyte, when we add a weak acid in water, will its conjugate strong base be a strong electrolyte too?

I am not sure if the questions makes sense. What i am trying to say is that, if weak acids form strong conjugate bases, why aren't they strong electrolytes? Thank you in advance.
10
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2answers
270 views

How is volatility useful in the production of acids?

Sulfuric acid because of its low volatility can be used to manufacture more volatile acids from their corresponding salts. How does volatility affect the production of acids? Isn't it that ...
5
votes
1answer
132 views

Why will CuSO4 solution be acidic?

An end-chapter problem posed in an 11-grade texbook asks to analyse whether a water solution of CuSO4 will be acidic. The standard answer is yes, because "$\ce{H2SO4}$ is a strong acid, hence ...
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votes
1answer
39 views

Why do acids donate protons?

I would have thought the answer to this question would be simple, but after searching this site I was unable to find any answers. I know Brønsted-Lowry acids are defined in terms of proton donation, ...
0
votes
0answers
38 views

pH of a double buffer

If $1,2,3,4$ moles of $\ce{H3PO4}$,$\ce{NaH2PO4}$,$\ce{Na2HPO4}$ and $\ce{Na3PO4}$ respectively are mixed together to form an aqueous solution of $1$Litre , resulting $\ce{pH}$ is? This question has ...
1
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1answer
106 views

Relationship between pKa and pKb

The $\mathrm{p}K_\mathrm{a}$ of $\ce{NH3}$ is $38$. Does it stand for the following equilibrium: $$\ce{NH4+ <=> NH3 + H+} \tag{1}$$ With $K_\mathrm{a} = 10^{-38}$ for reaction $(1)$, indicating ...
1
vote
1answer
249 views

Why does CO2 accept electrons?

CO2 is a lewis acid as it can accept electrons. But as the octets of all atoms of CO2 are complete why does it accept electrons? Shouldn't it donate electrons and be a lewis base?
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0answers
42 views

KC8H5O4 or KC8H4O4?

I'm searching for Potassium Hydrogen Phtalate (a primary standard solution) molecular mass but it seems that there are two formulas for this substance: $\ce{KC8H5O4}$ $\ce{KC8H4O4}$ Which one is ...
5
votes
2answers
93 views

Is ciprofloxacin acidic or basic?

I would expect an aqueous solution of ciprofloxacin to be basic for the following reasons: The carboxyl group has pKa = 6.09 and the secondary amino group has pKa = 8.74. Because 8.74 is further ...
0
votes
1answer
27 views

Will this series of reactions work to produce potassium phosphate?

I want to end up with a solution or anhydrous sample of potassium phosphate with which I can grow larger crystals. I want a challenge and something to do so I don't want to buy potassium phosphate, I ...
3
votes
1answer
50 views

Na2HPO4 is amphoteric: write the two reactions

$\ce{Na_2HPO_4}$ is amphoteric, which means it can act as a base or as a acid depending on which substance they react with. This is the reaction in which disodium phosphate appears to be an acid: ...
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0answers
45 views

A problem in ionic equilbrium

Question 1998(b) My attempt: I thought that $\ce{AgCl}$ would yield $\ce{Ag+}$ and $\ce{Cl-}$ ions, whose concentration can be found from $K_{sp}$ as $\sqrt{K_{sp}}$. This $\ce{Ag+}$ reacts with ...
3
votes
0answers
30 views

Application of limiting reagents and acid-base stoichiometry

I'm having a bit of trouble with the latter questions of this problem. 15.0mL of 1.4M $\ce{HCl}$ was mixed with 1.00g of $\ce{CaCO_3}$ until all the solid had dissolved. The solution was then ...
19
votes
1answer
780 views

Why is pyrimidine less basic than pyridine?

From Wikipedia's article on pyrimidine: Because of the decreased basicity compared to pyridine, electrophilic substitution of pyrimidine is less facile. But why is pyrimidine less basic than ...