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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Reaction of sodium with terminal alkyne

Can sodium (just sodium, not with liquid ammonia) react with terminal alkynes in a simple acid-base reaction to form sodium alkynide and dihydrogen (just as it reacts with $\ce{H2O}$ to form sodium ...
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0answers
20 views

Can an acid or base have a pH less than 0 or more than 14? [duplicate]

This question has been asked earlier, but I could not understand it. Please, someone explain it in an easier way.
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0answers
20 views

ap chemistry buffers [on hold]

have any AP chemistry teachers used http://introchem.chem.okstate.edu/DCICLA/pHbuffer20.html, as suggested by lab 16 in the lab manual put out by the college board? I am confused as to why the nitric ...
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1answer
22 views

How do I get the molarity of solution 1 given volume 1, molarity 2, and volume 2?

For example: What is the molarity of a $\ce{NaOH}$ solution if $25\rm~mL$ of the solution is exactly neutralized by $44\rm~mL$ of $0.32\rm~M~HCl$? I know that the abstract function is ...
3
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1answer
32 views

Is this asking for the equivalence point?

Is this question asking for the equivalence point of the titration curve? At what point does the concentration of acetic acid equal the concentration of the acetate ion? What is the pH of the ...
0
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0answers
29 views

Why methanoic acid is more acidic than phenol? [duplicate]

If you draw the resonatic structure, obviously, the conjugate base of phenol seems to be more stabilized than methanoic acid's. Then why this anomaly?
3
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1answer
44 views

Does a weak buffer solution still maintain a mostly steady pH if the acid or base load it has to buffer is small?

I need to buffer the $\mathrm{pH}$ of a solution to $3.0$ using a citrate buffer. I found a recipe to make a buffer solution that would use $82\%$ of $0.1\,\mathrm M$ citric acid (monohydrate) and ...
0
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1answer
42 views

Acceptable levels of HCl?

For a science/engineering project we are taking pool water (disinfected), filtering to 0.1 microns, and pumping to the kitchen. Of course there is still 5 ppm of chlorine present so we want to ...
0
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1answer
18 views

periodic table and reactions [closed]

Mancunium reacts violently with water to form a colourless gas and an alkaline solution. The alkaline solution is mancunium hydroxide with formula MOH. Mancunium also forms a chloride salt with ...
2
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3answers
94 views

How can I understand the Lewis acid-base interaction of iron(III) and water?

The interaction between $\ce{H+}$ and $\ce{NH3}$ as respectively a Lewis acid and a Lewis base is clear for me. $\ce{NH3}$ has a lone electron pair and $\ce{H+}$ has no electrons, or, saying politely, ...
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0answers
30 views

What exactly is alcoholic KOH and how is it different from aqueous KOH ? [duplicate]

What exactly is alcoholic KOH and how is it different from aqueous KOH ? Why is one of them considered a Strong base in organic chemistry while another is considered relatively moderate .
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0answers
40 views

Why strong bases like NaNH2 are only stabilised by H+ ions while the relatively moderate bases like aq KOH get stabilized by any positive charge

Why strong bases like $\ce{NaNH2}$ are only stabilized by $\ce{H+}$ ions while the relatively moderate bases like aq $\ce{KOH}$ get stabilized by any positive charge. Particularly in organic ...
3
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1answer
102 views

Which acid to choose when designing a world with acid seas? [closed]

I'm currently writing a narrative and hoping to include a world which is home to a sea of some form of 'nasty' substance (doesn't have to be acid). The varieties of inhabitants of this world have ...
3
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0answers
27 views

Is there a chemical that will etch antimony but not stainless steel?

I am working with ultra high vacuum equipment made out of stainless steel that has been contaminated with a number of metals, but in particular Antimony. We'd like to do some machining of the ...
1
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1answer
53 views

pH 10 to pH9 NaOH dilution

I have a pH 10 NaOH solution. I need to bring down the pH to 9. So I used the $C_1V_1 = C_2V_2$ approach. $C_1 = \mathrm{0.0001~mol/L}$ $V1$ is the necessary amount to produce 10 L of pH9 $C_2 ...
1
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1answer
47 views

Which is more acidic acetic acid or propanoic acid?

I got the answer from $K_a$ value that acetic acid is more acidic, but I have also read that inductive effect decreases as the length of alkyl group increases so acetic acid having a methyl group ...
1
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0answers
18 views

pKa values and basicity

In considering basicity (particularly of amines), often I find included with the compound a pKa. I understand that the higher the pKa of the conjugate acid, the stronger the base. But when the pKa is ...
1
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0answers
29 views

How does vinegar get rust off these coins

As experiment I found some really nasty rusty coins on the street. They were green. After looking on a website I found vinegar could eliminate the rust. It worked pretty well. I know this is a redox ...
0
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1answer
53 views

What is the effect of adding HCl on a certain solution at equilibrium?

If we have $$\ce{CH3COOH + H2O <=> CH3COO- + H+}$$ what is the effect on acetate ions when adding each HCl and NaOH to the solution? (State why according to Le Chatelier's principle) ...
0
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0answers
25 views

Calculation of pH in diluted buffer.

I have been preparing 150 mM and 30 mM Tris Buffers (pka=8.3). Using .15 M solutions of both Tris and Tris-HCL. Here is the information in which I have calculated theoretical pH values as well as ...
0
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0answers
32 views

Steric inhibition of resonance in Aniline and Benzoic acid [Edit]

My question is for what "approx" value of A (cyclohexane table) will a single ortho substitute will push NH2 and COOH (specifically for benzene derivatives)respectively out of plane, is it CH3 ...
0
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0answers
27 views

Alkaline Ester Hydrolysis Reaction

In an ester hydrolysis reaction using a dilute base what is the pH change before and after the reaction occurs. In this reaction I want to react methyl ethanoate with dilute sodium hydroxide. I want ...
2
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1answer
69 views

Which is the strongest base relative to ammonia?

I have these bases, ammonia methylamine ethylamine dimethylamine trimethylamine quinuclidine and these two questions: Which is the strongest base relative to ammonia? why? Which conjugate acid ...
1
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2answers
77 views

Does HF react with ethanol?

HF is needed to be dissolved in ethanol in many cases, e.g. in electrochemical etching for fabrication of porous material or in sol-gel synthesis of transition metal oxides being doped with F. Does HF ...
0
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0answers
15 views

Sulfuric acid as cathode electrolyte

If the cathode half reaction contains sulfuric acid as its electrolyte and the cathode electrode is platinum, will the 2H+ ion (from the dissociate of sulfuric acid) be reduced to H2(g) since the ...
0
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0answers
41 views

Find the concentration of the HCl solution when mixed with 1.265g of ACES-K+

$1.265\ \mathrm g$ of N-(2-acetamido)-2-aminoethanesulfonic acid potassium salt (ACES-K+, $M=220.29\ \mathrm{g/mol}$) is dissolved in $88.42\ \mathrm{mL}$ of water. $27.59\ \mathrm{mL}$ of ...
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0answers
36 views

Why is the pKa of methane 50? [duplicate]

I know that $\ce{CH4}$ can dissociate into $\ce{CH3-}$ and $\ce{H+}$ The dissociation acid constant is: $$K_a = \frac{[\ce{H+}][\ce{CH3-}]}{[\ce{CH4}]}$$ I know that $\ce{CH4}$ has a molarity of ...
2
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0answers
50 views

Why is Sodium Hydroxide not a good CO2 absorber

I was wondering why even though all hydroxides can "absorb" CO2, are not efficient?. I know that in particular, for sodium hydroxide it has to do with the binding energy involved, but I am still ...
0
votes
1answer
34 views

Reaction speed of Na2CO3 with vinegar vs that produced by NaHCO3 with CH3COOH

I'm working on a project requiring the easy production of a gas not corrosive to "normal" household materials (e.g. carbon dioxide). I settled on vinegar (acetic acid) and baking soda or washing soda, ...
4
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0answers
33 views

exchanging H2O in buffer for D2O - pH vs pD?

I have TBS pH 7.4 buffer that I am exchanging all the water out for D2O. How do I find out what the pD is after all the water is gone? I understand that pH meters don't work for deuterium, and it ...
0
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1answer
45 views

Phosphate group acidic or not?

I would like to ask whether or not the "Phosphate Functional Group" itself is acidic. I understand that the compound Phosphoric Acid is very acidic, with several hydrogens. However the Phopshate ...
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0answers
17 views

How to calculate pH of strong base and weak acid flows in a reactor?

I have a bubble column and I would like to calculate the pH that follows, when I have two fluids with different volumetric flow rates coming into the reactor (one is a weak acid an the other is NaOH). ...
0
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0answers
19 views

Can copper, nickel and chrome plating process only be done with HCl solution?

I want to know if electroplating process can only be done with HCl acid, without any copper, nickel , zinc and chrome liquid solutions? means equipment DC battery anode rode (zinc, copper, nickel ...
11
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1answer
119 views

Acidity of HCl in Acetic Acid

A question asked to find the pKa of $\ce{HCl}$ in acetic acid. The equation of $\ce{HCl}$ disassociating in water is: $$\ce{HCl + CH3COOH \leftrightharpoons CH3COOH2+ + Cl-}$$ I predicted that the pKa ...
1
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1answer
34 views

Charge of an amino acid sequence

I have the following problem: A polypeptide has the following sequence (amino end on the left) $$\mathbf{lysine - aspartic~acid-histidine-arginine-serine}$$ Using the $pK_a$ information ...
5
votes
4answers
397 views

How to calculate the concentration H3O+ in a solution with pH=6.99?

What is the correct way to calculate the concentration $\ce{H3O+}$ in a solution with $\ce{pH}=6.99$? Attempt 1. pH<7, therefore there are only $\ce{H3O+}$ particles in the solution. ...
3
votes
2answers
82 views

Why do you need to convert copper (II) hydroxide to copper (II) oxide before converting to copper (II) sulfate?

This is the protocol for a practical class I once took. The idea is that copper nitrate is converted to hydroxide, oxide, sulfate and then finally solid copper. I know that $\ce{CuO(s) + H2SO4(aq) ...
2
votes
1answer
49 views

Titration Question

Problem: A solution of an unknown weak acid of unknown concentration was titrated with a solution of a strong base of unknown concentration. During the titration, the pH after adding $2.00$ mL of the ...
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0answers
27 views

Mangia Macchia - 1 - 3% sodium Hydroxide

HELP PLEASE!!! Someone used Mangia Macchia and the composition of this product is 5 - 7% benzyl alcohol and 1-3% SODIUM HYDROXIDE. Does this mixture stain chrome? I have horrible stains on my ...
0
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0answers
21 views

pH-dependency of the acidic dissociation of carbonic acid

I know the product of $\ce{CO2 +H2O}$ yields $\ce{H2CO3}$. This is a reversible equation so $\ce{H2CO3}$ goes back to $\ce{H2O + CO2}$. However, my question is: Is there a certain pH which will ...
8
votes
2answers
171 views

Why are acids usually depicted in fiction as green?

In cartoons, etc., acid is generally shown as vividly green, as in this scene from the Simpsons: We even have the colour "acid green". But when I used to use acids in chemistry class, they weren't ...
1
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0answers
30 views

Ammonia and ionization of water [closed]

$\ce{NH3}$ is ammonia. In the equation $$\ce{H2O +NH3 -> OH- +NH4+}$$ why does the $\ce{H2O}$ transfer a $\ce{H+}$ to the ammonia? Why chemically does ammonia accept a $\ce{H+}$ and what exactly ...
0
votes
2answers
40 views

Can I use lye as a cooking leavener instead of baking soda?

I asked this question on the cooking site, but got unsatisfactory answers: http://cooking.stackexchange.com/questions/65520/can-i-use-lye-as-a-leavener-instead-of-baking-soda I'm interested to try to ...
4
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3answers
136 views
+50

Problem in understanding nomenclature of mineral acids

My basic knowledge about nomenclature is - A mineral acid is called hypo when it has one less oxygen than the original one, a pyro acid when 2 molecules of acid add up with release of H2Oa meta acid ...
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3answers
88 views

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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0answers
34 views

How much energy does it take to produce water from talc?

Given talc, $\ce{Mg3Si4O10(OH)2}$ which can be disolved in a strong acid with water to produce $\ce{Mg3Si4O10(OH)2 +6H+ + 4H2O -> 3Mg^{2+} + 4H4SiO4}$, what can be done to produce more water than ...
1
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1answer
67 views

NaOH to stabilize aqueous NaCN

This patent notes in passing: It may be necessary to add $\ce{NaOH}$ to stabilize aqueous $\ce{NaCN}$. Anyone skilled in the art would know the amount of $\ce{NaOH}$ to add. Obviously I'm not ...
0
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0answers
7 views

How does hydrogen bonding effects acidity or basicity? [duplicate]

Does hydrogen bonding increases or decreases the acidity or basicity ?How can I determine
1
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0answers
33 views

How to know if acid is polyprotic?

I know that some acids for sure and for certain are polyprotic. For example sulfuric acid $\ce{H2SO4}$ is diprotic giving you disulfate $\ce{HSO4-}$ and sulfate $\ce{SO4^2-}$ However not all acids ...
3
votes
1answer
36 views

Creating Boric Acid from Borax and Hydrochloric Acid

I'm working on an experiment in school and I need to create 200 mL of 2 mol/L boric acid. According to a formula I found on wikipedia, boric acid can be created with a reaction with ...