Ionic Equilibrium
Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Ionic equilibrium is established between the ions and unionized species in a system. Understanding the concept of ionic equilibrium is very important to answer the questions related to certain chemical reactions in chemistry.
Arrhenius Acid
Arrhenius acid act as a good electrolyte as it dissociates to its respective ions in the aqueous solutions. Keeping it similar to the general acid properties, Arrhenius acid also neutralizes bases and turns litmus paper into red.
Bronsted Lowry Base In Inorganic Chemistry
Bronsted-Lowry base in inorganic chemistry is any chemical substance that can accept a proton from the other chemical substance it is reacting with.
From pair, select the stronger base. For stronger base, write a structural formula of its conjugate acid.
The stronger an acid is, the weaker is its conjugate base, and, conversely, the stronger a base is, the weaker is its conjugate acid.
pKa value of water is 14 at 25˚C and pKa value of methanol is 15.5. Since pKa value of water is less than that of methanol, thus water is more acidic than methanol.
(pKa is inversely related to acidity).
The relative acidity of water and methanol (each in water) can be compared by the +I effect. Due to greater +I effect of CH3 group, its conjugate base formed, CH3O- is not stable. Thus H2O is considered to be more acidic than CH3OH.
Since water is more acidic as compared to methanol, thus the conjugate base of water, i.e OH- will be a weaker base than the conjugate base of CH3OH, i.e. CH3O-.
Therefore the stronger base among OH- and CH3O- is CH3O-.
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