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Topic: Strong acid


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  Strong acid - Wikipedia, the free encyclopedia
This generally means that in aqueous solution at standard temperature and pressure, the concentration of hydronium ions is equal to the concentration of strong acid introduced to the solution.
While strong acids are generally assumed to be the most corrosive, this is not always true.
The difference separating the acid dissociation constants of strong acids from all other acids is so great that this is a reasonable demarkation.
en.wikipedia.org /wiki/Strong_acid   (242 words)

  
 Hydrochloric acid - Wikipedia, the free encyclopedia
It is a strong acid, the major component of gastric acid and of wide industrial use.
Strong acid titrants are useful because they give more distinct endpoints in a titration, making the titration more precise.
Hydrochloric acid is a fundamental chemical, and as such it is used for a large number of small-scale applications, such as leather processing, household cleaning, and building construction.
en.wikipedia.org /wiki/Hydrochloric_acid   (2517 words)

  
 Acid - Wikipedia, the free encyclopedia
The strength of an acid may be understood by this defintion by the stability of hydronium and the solvated conjugate base upon dissociation.
Strong acids are dangerous, causing severe burns for even minor contact.
Nitric acid, sulfuric acid, and perchloric acid are all strong acids, whereas nitrous acid, sulfurous acid and hypochlorous acid are all weak.
en.wikipedia.org /wiki/Acid   (1333 words)

  
 Acid/Base Strength   (Site not responding. Last check: 2007-09-18)
When a strong acid of a given concentration in a dilute aqueous solution ionizes, the resulting concentration of hydronium ions and the resulting concentration of the conjugate base are equal to the original concentration of the acid.
In order to calculate the concentration of the weak acid at equilibrium, the fact that a decrease in the concentration of the acid corresponds to an increase both in the concentration of the hydronium ions and of the conjugate base must be used.
The conjugate acid of a weak base is a strong acid and the conjugate base of a strong acid is a weak base.
www.scientia.org /cadonline/Chemistry/acidbase/strength.ASP   (682 words)

  
 Acid Base Reactions   (Site not responding. Last check: 2007-09-18)
The strength of an acid is determined by the extent to which it donates its proton in the presence of a common base such as water.
Strong acids essentially dissociate (lose their protons) completely and have relatively large dissociation constants, whereas weak acids dissociate only slightly and have relatively small dissociation constants.
Strong acids dissociate completely such that if HA in equation [5.14] is a strong acid, the reaction goes completely to the right and [HA] essentially equals zero.
www.ce.udel.edu /~cawalker/AcidBase.html   (3800 words)

  
 Re: what is the difference between strong acid and concentrated acid?
How strong this needs to be will vary from solvent to solvent, but we normally think of a strong acid as one that is completely dissociated in water.
Glacial acetic acid is a concentrated weak acid, and industrial sulfuric acid (about 98% by weight, the other 2% is water) is a concentrated strong acid.
Even strong acids are not completely dissociated when the concentration is too high: concentrated hydrochloric acid, even though it is only 12-13 moles per liter in water, is concentrated enough that there are irritating fumes of HCl gas above the acid.
www.madsci.org /posts/archives/mar2001/984178336.Ch.r.html   (290 words)

  
 pH of strong Acids and Bases   (Site not responding. Last check: 2007-09-18)
] of a strong acid is equal to the concentration of the acid.
Strong bases is pretty much the same as strong acids EXCEPT you'll be calculating a pOH first, then going to the pH.
The [OH¯] of a strong acid is equal to the concentration of the base.
dbhs.wvusd.k12.ca.us /webdocs/AcidBase/pH-Strong-Acid-Base.html   (301 words)

  
 Acid Strength
Strong acids have mostly ions in solution, therefore the bonds holding H and A together must be weak.
Acids or bases with strong bonds exist predominately as molecules in solutions and are called "weak" acids or bases.
Acids or bases with weak bonds easily dissociate into ions and are called "strong" acids or bases.
www.elmhurst.edu /~chm/vchembook/185strength.html   (404 words)

  
 The Other Strong Acid: Nitric
Nitric acid is also a key component in the manufacturing of adipic acid and terephthalic acid.
Dilute nitric acid from the process in Figure 1 is fed to the concentration unit as shown in Figure 2 along with concentrated sulfuric acid (usually 60-67% by weight).
The addition of sulfuric acid is necessary due to the azeotrope formed between nitric acid and water.
www.cheresources.com /nitricacid.shtml   (618 words)

  
 Acid-Base
When we represent an acid in reaction, we often use simply HA (or HB) where the H is the proton that is released in reaction with bases and the A (or B) is the rest of the molecule.
Similarly, Strong bases are levelled to the strongest base that can exist in water, OH Thus, any intrinsic differences in the strengths of strong acids (or bases) are not detectable in water since they can't exist in aqueous solution.
An indicator is a weak acid that is coloured and whose colour is different from that of its conjugate base (or vice versa).
www.chem.queensu.ca /people/faculty/mombourquette/FirstYrChem/acidbase   (7685 words)

  
 Strong Acid
Excess moles of strong base + limiting moles of strong acid (solution of OH The following example illustrates the calculations involved in the titration of a strong acid with a strong base.
Note that the titration of a strong base with a strong acid occurs in a similar fashion.
The four regions outlined above are presented stepwise as strong base is titrated into the strong acid.
wwwchem.csustan.edu /chem1110/Strong.htm   (210 words)

  
 Chemical of the Week -- Phosphoric Acid
Pure anhydrous phosphoric acid is a white solid that melts at 42.35°C to form a viscous liquid.
Phosphoric acid is not a particularly strong acid as indicated by its first dissociation constant.
Phosphoric acid is used primarily in the manufacture of fertilizers, detergents, and pharmaceuticals.
scifun.chem.wisc.edu /chemweek/H3PO4/H3PO4.html   (715 words)

  
 Acid Strength
Also in any acid base reaction, the strong acid and strong base always proceeds to the weaker acid and base since the strong acid and base are better able to function as acid and base.
The weaker the acid the stronger is the bond between its Hydrogens and the rest of the molecule.
If we compared acid strength with acids where the atoms bonded to Hydrogen were in the same period, the difference in the size of the atoms would not be significant.
members.aol.com /logan20/acid_str.html   (1888 words)

  
 Kids.net.au - Encyclopedia Strong acid -   (Site not responding. Last check: 2007-09-18)
A strong acid is an acidic compound which ionizes completely or almost completely in aqueous solution.
Differentiating between the strength of the strong acids in aqueous solutions is impossible, because the concentration of hydrogen ions is always equal to the concentration of the acid.
Only through replacing water with concentrated Acetic acid as a diluent one can observe and measure diference in the tendency to dissociate the proton ion, among the strong acids.
www.kidsseek.com /encyclopedia-wiki/st/Strong_acid   (153 words)

  
 Titration Strong Acid/Strong Base   (Site not responding. Last check: 2007-09-18)
A titration is done with a strong acid and a strong base of equal concentrations using microscale techniques.
Since the same pipet was used for both acid and base, calibration of this pipet is unnecessary.
Since you are counting drops of acid and drops of base, water in the test tubes does not affect the lab.
dwb.unl.edu /Chemistry/MicroScale/MScale18.html   (638 words)

  
 Chemistry: Acids and Bases
Strong Acids: These acids completely ionize in solution so they are always represented in chemical equations in their ionized form.
Strong Bases: Like strong acids, these bases completely ionize in solution and are always represented in their ionized form in chemical equations.
An acid-base titration is when you add a base to an acid until the equivalence point is reached which is where the moles of acid equals the moles of base.
www.shodor.org /unchem/basic/ab   (1233 words)

  
 Sulphuric Acid   (Site not responding. Last check: 2007-09-18)
Sulphuric acid is the strong acid produced by dissolving sulphur trioxide in water.
For example, Sulphuric Acid, H2SO4, which is a strong acid is fully dissociated, and all the displaceable hydrogen in the acid is present in solution as Hydrogen Ion, H(+).
The Contact Process is used for manufacturing sulphuric acid and fuming sulphuric acid from sulphur dioxide, which is made by burning sulphur or by roasting sulphide ores and oxygen (in the form of air) which combine to form sulphur trioxide in the presence of a
www.ucc.ie /ucc/depts/chem/dolchem/html/comp/h2so4.html   (1300 words)

  
 [No title]
Describe the form of the titration curves for titration of a strong acid by a strong base, a weak acid by a strong base, or a weak base by a strong acid.
For a reaction between an acid and a base, a titration is useful for measuring the pH at various points throughout the reaction.
The gradual slope results from a buffer solution being produced by the addition of the strong acid or base, which resists rapid change in pH until the added acid or base exceeds the buffer's capacity and the rapid pH change occurs near the equivalence point.
www.chem.ubc.ca /courseware/pH/section14/content.html   (992 words)

  
 NetLogo Models Library: Strong Acid
It is important to note that this model simulates a strong acid and a strong base interacting.
Acids and bases that are classified as strong dissociate completely in water.
Chemists often titrate acids and bases together to determine how stable the pH of a particular acid or base is. This experiment is done by taking a known amount of acid and adding various amounts of base to it.
ccl.northwestern.edu /netlogo/models/StrongAcid   (925 words)

  
 Liquid Separations: Product Information - Strong Acid Cation Resins   (Site not responding. Last check: 2007-09-18)
Strong acid cation resin is used for water softening in the Na cycle and for demineralization when the temporary hardness in the feed is <40%.
For small plants and with HCl as regenerant, a strong acid cation also offers a simple effective solution on waters with >40% temporary hardness. DOWEX™ MARATHON™ C resin is the resin of choice for most applications DOWEX UPCORE™ Mono C-600 resin is ideal for UPCORE system plants.
A macroporous strong acid cation exchange resin for mixed bed demineralization and condensate polishing applications.
www.dow.com /liquidseps/prod/sac.htm   (568 words)

  
 Notes on Acids and Bases   (Site not responding. Last check: 2007-09-18)
The remainder of the acids therefore are considered weak acids.
In the case of a strong acid dissociating, only one arrow (→) is required since the reaction goes virtually to completion.
Note that like weak acids, this reaction is shown to be at equilibrium, unlike the dissociation of a strong base which is shown to go to completion.
www.chem.vt.edu /RVGS/ACT/notes/Notes_on_acids_and_bases.html   (1196 words)

  
 ChemTeam: Strong and Weak Acids and Bases
The explanation for why strong electrolytes behaved the way they did was first suggested in 1904, but was not proven until 1923.
Certain acids are considered to be strong, which means they are dissociated 100% in solution.
There are a few others which are "almost" strong and sometimes a textbook author will include one in his or her own list.
dbhs.wvusd.k12.ca.us /webdocs/AcidBase/Strong-Weak-AcidBase.html   (757 words)

  
 Chemical Sciences: Acidity of Solutions of Strong Acids
A strong acid, by definition, is an acid that is completely ionized in aqueous solution, that is, an acid which produces one or more protons for every acid molecule originally present.
Therefore, in an aqueous solution of a strong acid, acidity is essentially determined by the concentration of strong acid alone.
Only when the concentration of strong acid present is very low does the autoionization of water become a comparable or dominant contributor to the solution pH.
www.psigate.ac.uk /newsite/reference/plambeck/chem1/p01151.htm   (305 words)

  
 acid-base indicators
In this case, the weak acid is colourless and its ion is bright pink.
It couldn't distinguish between a weak acid with a pH of 5 or a strong alkali with a pH of 14.
The curve is for a case where the acid and base are both equally weak - for example, ethanoic acid and ammonia solution.
www.chemguide.co.uk /physical/acidbaseeqia/indicators.html   (1443 words)

  
 CHM 1046   (Site not responding. Last check: 2007-09-18)
Alternatively, a known concentration of acid is slowly added to a basic solution until the base is completely neutralized.
Therefore, when a strong acid is combined with a strong base it produces a salt (anion from strong acid, cation from a strong base) that has no tendency to affect the pH of a solution
The amount of strong base that is added will ionize completely, to produce a stoichiometric amount of OH aq) and conjugate acid (e.g.
wine1.sb.fsu.edu /chm1046/notes/AddAqEq/Titrate/Titrate.htm   (1309 words)

  
 Chemistry 19-104 Acid Base FAQ
You should memorize the strong acids because there are only a few and then all the rest are weak.
Also, for aqueous solution, a strong acid has a very large equilibrium constant, so large it cannot be measured.
As a practical matter, if you have memorized the small number of strong acids, all the rest must be weak.
www.chembio.uoguelph.ca /educmat/chm19104/acid-faq.htm   (524 words)

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