1. #1
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    What is Salt Hydrolysis?

    Please do help me with this question of competitive exam.

    what is salt hydrolysis?explain briefly

  2. #2
    chandu6444 Array
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    Re: What is Salt Hydrolysis?

    dear friend,

    Salt hydrolysis:
    When a salt is dissolved in water, the ions making up that salt can hyrolyze .Hydrolysis is simply the reaction of a substance,in this case an ion or ions ,with water.we have talked about hydrolysis reactions previously,although we have not called them that.
    the ionization of a weak acid or a weak base in water is hydrolysisreaction.This is the case ,since the formation of ions from the weak acid or weak base depends on that reaction.


    ALL THE BEST...............

  3. #3
    shubhasharma Array
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    Re: What is Salt Hydrolysis?

    Hydrolysis is a reaction of acid with water, which is acting as a base.the reaction in which anions of salts reacts with water to produce acid or base is called salt hydrolysis.......

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    Re: What is Salt Hydrolysis?

    Dear sir/madam,
    - Salt hydrolysis is a Salt is held together by ionic bonds. The chlorine atom has a much greater attraction for the outer electron of the sodium atom than the sodium atom does. This makes the chlorine a negative ion, and the sodium a positive one, and dry, they stick together tightly with an iconic charge.

    - Water is one oxygen and 2 hydrogen atoms, covalently bonded (shared electrons). If the atoms all lined up in a straight line, water would be neutral, but water forms a Vee. The oxygen atom has a greater attraction for electrons than the hydrogens, so the electrons spend more time around the oxygen, making it negative, and the hydrogens somewhat positive (not as much as in an ionic bond).

    - When salt is dropped into water, it is surrounded by water molecules which turn until the oxygen faces the sodium, and the hydrogens face the chlorine. This lessens the attraction of the sodium atoms for the chlorine atoms, and they go into solution, "dissolve." They reason for being a crystal is negated by the "hydrogen bonds" of many water molecules.

    - If the water evaporates, everything reverses and salt crystals form. All salts should be neutral when hydrolysed, as they contain a positive and negative ion. An acid must contain hydrogen, as an acid is a "proton
    donor."

    I hope my this details will help you to resolved your query.

    All the best

  5. #5
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    Re: What is Salt Hydrolysis?

    Hi friend,

    The salt hydrolysis word is related to the chemistry subject.Here i mentioned the clear details of the salt hydrolysis.

    >>> DEFINITION OF SALT HYDROLYSIS :

    It is defined as a reaction in which the cation or anion or both of a salt react with water to produce acidity or alkalinity.

    This means

    Pure water is a weak electrolyte and neutral in nature, i.e,H+ ion concentration is exactly equal to OH- ion concentration.

    We conclude as [ H+ ] = [ OH- ]

    When this condition is disturbed by decreasing the concentration of either of the two ions,the neutral nature changes into acidic or basic.

    1. When [ H+ ] > [ OH-] ,the water becomes acidic.

    2. When [ H+ ] < [ OH- ] ,the water becomes basic nature.

    This is exactly the change which occurs during the phenomenon known as salt hydrolysis.

    Salts are strong electrolytes.When dissoved in water,they dissociate almost completely into ions.

    M+ + H2O <-> MOH + H+

    In other salts ,anoions may be more reactive in comparison to cations and these react with water to produce OH- ions.

    A- + H2O <-> HA + OH- ( weak acid ).

    >>> EXAMPLES OF WEAK AND STRONG SALTS.

    1. SALTS OF STRONG ACID AND WEAK BASE ARE

    FeCl3 , CuCl2 ,NH4Cl etc.

    2. SALTS OF STRONG BASE AND WEAK ACID.

    CH3COONa ,NaCN ,NaHCO3 etc.

    3. SALTS OF WEAK ACID AND A WEAK BASE.

    CH3COONH4 ,NH4HCO3 etc.

    4. SALTS OF A STRONG ACID AND A STRONG BASE.

    NaCl ,K2So3 etc..

    I hope you satisfied with this answer if you want more details then email me will suggest you books.

  6. #6
    rajpurohitt Array
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    Re: What is Salt Hydrolysis?

    dear friend,

    Salt Hydrolysis = Salt + Hydra (water) + Lysis (break)

    means salt breaks into ions with the help of Water.

    "when a salt dissolved in water then salt breaks into Ions, this phenomena called Salt Hydrolysis."

    NaCl (s) + H2O (l) <==> Na + Cl-


    i add pdf file of Salt Hydrolysis Questions -
    Attached Files

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    Re: What is Salt Hydrolysis?

    Salt Hydrolysis:




    Pure water is a weak electrolyte and neutral in nature, i.e., H+ ion concentration is exactly equal to OH" ion concentration
    [H+] = [OH-]

    When this condition is disturbed by decreasing the concentration of either of the two ions, the neutral nature changes into acidic or basic. When [H+] > [OH-], the water becomes acidic and when [H+] < [OH-], the water acquires basic nature. This is exactly the change which occurs during the phenomenon known as salt hydrolysis. It is defined as a reaction in which the cation or anion or both of a salt react with water to produce acidity or alkalinity.
    Salts are strong electrolytes. When dissolved in water, they dissociate almost completely into ions. In some salts, cations are more reactive in comparison to anions and these react with water to produce H+ ions. Thus, the solution acquires acidic nature.
    M+ + H2O ↔ MOH + H+
    Weak base
    In other salts, anions may be more reactive in comparison to cations and these react with water to produce OH- ions. Thus, the solution becomes basic.
    A- + H2O ↔ HA + OH-
    Weak acid
    The process of salt hydrolysis is actually the reverse of neutralization.

    Salt + Water ↔ Acid + Base
    If acid is stronger than base, the solution is acidic and in case base is stronger than acid, the solution is alkaline. When both the acid and the base are either strong or weak, the solution is generally neutral in nature.

    As the nature of the cation or the anion of the salt determines whether its solution will be acidic or basic, it is proper to divide the salts into four categories.
    (i) Salt of a strong acid and a weak base.
    Examples: FeCl3, CuCl2, AlCl3, NH4Cl, CuSO4, etc.
    (ii) Salt of a strong base and a weak acid.
    Examples: CH3COONa, NaCN, NaHCO3, Na2CO3, etc.
    (iii) Salt of a weak acid and a weak base.
    Examples: CH3COONH4, (NH4)2CO3, NH4HCO3, etc.
    (iv) Salt of a strong acid and a strong base.
    Examples: NaCl, K2SO4, NaNO3, NaBr, etc.

  8. #8
    mahi4mk Array
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    Re: What is Salt Hydrolysis?

    Dear aspirants,

    defination for Salt Hydrolysis

    It is defined as a reaction in which the cation or

    anion or both of a salt react with water to produce

    acidity or alkalinity.In other words define

    " recation with water salt in anion and cation is called salt hydrolysis"

    with regards mahi....

  9. #9
    Manoj1 Array
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    Re: What is Salt Hydrolysis?

    hello...
    when salt is added to water or any aqueous solution the hydrolysis process starts in which the ions get separated,the cation and the anion parts gets separated and search for the corresponding alternative ions to get balance in that solution. some of the examples of salt hydrolysis are as follows:-NACL in water,CACl2 in liquid profile,sodium acetate in benzene solution etc..........

  10. #10
    archna21 Array
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    Re: What is Salt Hydrolysis?

    Salt Hydrolysis

    It is the reaction of the cation or the anion or both the ions of the salt with water to produce either acidic or basic solution. Hydrolysis is the reverse of neutralization.






    or we can say....When a salt is dissolved in water, the ions making up that salt can hydrolyze.
    Hydrolysis is simply the reaction of a substance, in this case an ion or ions, with water.


    For Complete Information about Salt Hydrolysis....Click Here

  11. #11
    srini Array
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    Re: What is Salt Hydrolysis?

    SALT HYDROLYSIS


    Its a common kind of hydrolysis occurs when a salt of acid is dissolved in water. Water spontaneously ionizes into hydroxyl anions and hydrogen cations.

    Example : sodium acetate dissociates in water into sodium ions. Sodium ions react very little with the hydroxyl ions whereas the acetate ions combine with hydrogen ions to produce acetic acid. In this case the net result is a relative excess of hydroxyl ions, giving a Solution.

  12. #12
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    Re: What is Salt Hydrolysis?

    Salt hydrolysis is the reaction of the cation or the anion or both the ions of the salt with water to produce either acidic or basic solution.

    Hydrolysis is the reverse of neutralization.

    The general equation for the hydrolysis of a salt (BA),

    Applying the law of chemical equilibrium, we get

    [HA][BOH]/[BA][H2O] = K, where K is the equilibrium constant.

    Since water is present in very large excess in the aqueous solution, its concentration [H2O] may be regarded as constant so,

    [HA][BOH]/[BA] = K[H2O = Kh]

    where Kh is called the hydrolysis constant.

  13. #13
    omprakash_dhaker Array
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    Re: What is Salt Hydrolysis?

    Salt hydrolysis is studies in detail in physical chemistry .When students of science go through ionic equilibrium then this term is countered,they have to study this topic in detail.Salt hydrolysis mean in the presence of water any salt break into ions ,one ionic part is acidic and other in basic in nature.For example in the presence of water Sodium chloride breaks into sodium ion and chloride ion ,these ion further react with water and give NaOH and HCl.

    NaCl+water->NaOH+HCl.

    Here HCl is acid and NaOH is base.

  14. #14
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    Re: What is Salt Hydrolysis?

    Salt hydrolysis is basically used to determine whether a given solution is neutral, basic or acidic.
    The ionization of a weak acid or base in water is termed as hydrolysis, example of a hydrolysis reaction is : NH3 (g) + H2O (l) <==> NH4+ (aq) + OH- (aq)

    Whether a component of salt, i.e cation or anion will react with water when dissolved with it depends on certain characteristics i.e will depend in whether they are the conjugate acid of a strong base or the cation present in a strong base, or the conjugate acid of a weak base.

    For common salt i.e NaOH, we can see the following reaction taking place.
    NaOH ----->Na+ + OH-
    Use can see man such salts being diffused in water, where they either combine with the ions of water or just diffuse.
    Examples, for salts like weak acid HCN, NaCl, salt NaC2H3O2, the cation is still Na+, so there is no hydrolysis, but now the anion is C2H3O2-, the acetate ion, the conjugate base of a weak acid, which will hydrolyze in water in the following fashion:
    C2H3O2- (aq) + H2O (l) <==> HC2H3O2 (aq) + OH- (aq)
    Since only the anion undergoes hydrolysis, producing OH-, we should expect the pH of that solution to become basic.

    Salt Hydrolysis is one of the easiest phenomenas in chemistry, yet it could get complicated at times.
    600px-Prevost_Reaction_Mechanism.jpg
    Attached Images

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    Re: What is Salt Hydrolysis?

    Salt hydrolysis is the process by which a salt breaks up into a weak acid and a strong base.Or strong base and a weak acid or weak acid and weak base on dissolving in water.Or just in simple terms it is the break up of ions of salt in water.

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    Re: What is Salt Hydrolysis?

    Quote Originally Posted by Unregistered View Post
    Please do help me with this question of competitive exam.

    what is salt hydrolysis?explain briefly

    Hai....

    When acids and Bases react with each other,they can form a salt and water.This is called Neutralization reaction and takes the following form:

    HA+BOH -->BA+H20

    Depending on the solubility of the salt, it may remain in ionized form in the solution or it may precipitate out of solution.

    Neutralization reactions usually proceed to completion.

    The Reverse of the neutralization reaction is called hydrolysis.In Hydrolysis reaction a salt reacts with water to yield the Acid or Base.


    ALL THE BEST.......

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    Re: What is Salt Hydrolysis?

    * Salt hydrolysis is a reaction in which the cation or anion or both react with water to produce alkalinity or acidity...!!

    * Pure water is a weak electrolyte...!

    * It is neutral in nature,...!

    * Neutral in the sense the no. of [H]+ ions concentration equals the concentration of [OH]- ions ...!

    * [H]+ = [OH]-

    * When this stability is disturbed, the water becomes acidic or basic...!

    * If concentration of H+ is more than that of OH- , water is acidic..

    * If concentration of OH- is more than that of H+, water is basic...

    * Salts are strong electrolytes....!

    * They dissociate to give cations and anions...!

    * In some cases anions are more reactive and they react with water to produce acidic solution....!

    * In other cases cations are more reactive and they react with water to produce basic solution.....!

    * In the former case you get a weak base and in the latter one you get a weak acid...!!

    * It is nothing but the reverse of neutralisation recation...!!

    * Salt + Water -> Acid + Base

    * This process is known as Salt hydrolysis...!!!


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    Smile Re: What is Salt Hydrolysis?

    Re: What is Salt Hydrolysis?
    =======================
    Hi friend,
    Hope you are in good health and good state of mind!
    It's always a treat and fun to answer your queries.
    I also appreciate the confidence that you have shown in us!


    The reaction in which cation or anions of salts reacts with water to produce acid or base is called salt hydrolysis.
    To find out more,I'm sending you a video that shows a Chemistry Tutorial that discusses this topic.
    I have especially found out this video for you!
    The URL for the video is:

    http://www.youtube.com/watch?v=Zrl6gz38SHI



    I hope I have answered all your doubts.
    It was a pleasure answering your queries.
    Hope that you'll come up with some more challenging queries!
    Till then,take care.
    Bye!



    index.jpg


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    Re: What is Salt Hydrolysis?

    Quote Originally Posted by Unregistered View Post
    Please do help me with this question of competitive exam.

    what is salt hydrolysis?explain briefly
    Hi

    If you want to know about Salt Hydrolysis, Please Watch this video as its explained very well in it..


    Apart from this, You can Click Here to know the theory about it..

    Hope this helps
    All the best
    Regards
    RANJEET

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