Chemistry-
General
Easy
Question
the-dissociation of weak electrolyte (weak acid) is expressed in terms of Ostwald dilution law stronger is the acid, weaker is its conjugate base_ The dissociation constants of an acid (
) and its conjugate base (
) are related by the given relation: -
At 
(Ionic product of water) 
Phosphoric acid isa weak acid. It is used in fertilizer, food, detergent and toothpaste. Structure of phosphoric acid is:
Aqueous solution of phosphoric acid with a density oflg mL-1 containing 0.05% by weight of phosphoric acid is used to impart tart taste to many soft drinks. Phosphate ion is an inteife ring radical in qualitative analysis. It should be removed for analysis beyond third group of qualitative analysis
the basicity of phosphoric acid is:
- 1
- 2
- 3
- 4
The correct answer is: 3
Related Questions to study
Chemistry-
The product of the concentrations of the -ions of an electrolyte raised to power of their coefficients in the balanced chemical equation in the solution at any concentration. Its value is not constant and varies with change in concentration. Ionic product of the saturated solution is called solubility product 
i) When 
' the solution is just saturated and no precipitation takes place
ii) When 
the solution is unsaturated, and precipitation will not take place
iii) When 
' the solution is supersaturated, and precipitation takes place
Which of the following is most soluble?
The product of the concentrations of the -ions of an electrolyte raised to power of their coefficients in the balanced chemical equation in the solution at any concentration. Its value is not constant and varies with change in concentration. Ionic product of the saturated solution is called solubility product
i) When ' the solution is just saturated and no precipitation takes place
ii) When the solution is unsaturated, and precipitation will not take place
iii) When ' the solution is supersaturated, and precipitation takes place
Which of the following is most soluble?
Chemistry-General
Chemistry-
An acid-base titration consists of the controlled addition of a dissolved base to a dissolved acid (or the reverse). Acid-base react rapidly to neutralize each other. At the equivalence point, enough titrant, the solution being added, has gone into make the chemical amounts of the acid and base' exactly equal. The pH of a titration changes every time a drop of titrant is added, but the rate of this change varies enormously. A titration curve, graph of pH tis a function of the volume of titrant, displays in detail how the pH changes over the course of an acid-base titration. Significantly, the pH changes most rapidly near the equivalence point. The exact shape of a titration curve depends on the and acid and base
Which of the titrations could it represent?
An acid-base titration consists of the controlled addition of a dissolved base to a dissolved acid (or the reverse). Acid-base react rapidly to neutralize each other. At the equivalence point, enough titrant, the solution being added, has gone into make the chemical amounts of the acid and base' exactly equal. The pH of a titration changes every time a drop of titrant is added, but the rate of this change varies enormously. A titration curve, graph of pH tis a function of the volume of titrant, displays in detail how the pH changes over the course of an acid-base titration. Significantly, the pH changes most rapidly near the equivalence point. The exact shape of a titration curve depends on the and acid and base
Which of the titrations could it represent?
Chemistry-General
Chemistry-
An acid-base titration consists of the controlled addition of a dissolved base to a dissolved acid (or the reverse). Acid-base react rapidly to neutralize each other. At the equivalence point, enough titrant, the solution being added, has gone into make the chemical amounts of the acid and base' exactly equal. The pH of a titration changes every time a drop of titrant is added, but the rate of this change varies enormously. A titration curve, graph of pH tis a function of the volume of titrant, displays in detail how the pH changes over the course of an acid-base titration. Significantly, the pH changes most rapidly near the equivalence point. The exact shape of a titration curve depends on the and acid and base
The following figure represents titration curve of HCl against NaOH. The pH at equivalence point will be:
An acid-base titration consists of the controlled addition of a dissolved base to a dissolved acid (or the reverse). Acid-base react rapidly to neutralize each other. At the equivalence point, enough titrant, the solution being added, has gone into make the chemical amounts of the acid and base' exactly equal. The pH of a titration changes every time a drop of titrant is added, but the rate of this change varies enormously. A titration curve, graph of pH tis a function of the volume of titrant, displays in detail how the pH changes over the course of an acid-base titration. Significantly, the pH changes most rapidly near the equivalence point. The exact shape of a titration curve depends on the and acid and base
The following figure represents titration curve of HCl against NaOH. The pH at equivalence point will be:
Chemistry-General
Chemistry-
When a salt reacts with water to form acidic or basic solution, the process is called hydrolysis. The pH of salt solution can be calculated using the following relations
(for salt of weak acid and strong base.)
(for salt of weak base and strong acid.)
(for salt of weak acid and weak base.)
where, 'C' represents the concentration of salt.
When a weak acid or a weak base is not completely neutralized by strong base or strong acid respectively, then formation of buffer takes place. The pH of buffer solution can be calculated using the following relation
When 50 mL of 0.1 M NaOH is added to 50 mL of 0.05 M 
solution. The pH of the solution is:
When a salt reacts with water to form acidic or basic solution, the process is called hydrolysis. The pH of salt solution can be calculated using the following relations
(for salt of weak acid and strong base.)
(for salt of weak base and strong acid.)
(for salt of weak acid and weak base.)
where, 'C' represents the concentration of salt.
When a weak acid or a weak base is not completely neutralized by strong base or strong acid respectively, then formation of buffer takes place. The pH of buffer solution can be calculated using the following relation
When 50 mL of 0.1 M NaOH is added to 50 mL of 0.05 M solution. The pH of the solution is:
Chemistry-General
Chemistry-
The equilibrium constant for this reaction is approximately 
Which is the strongest conjugate base in this reaction?
The equilibrium constant for this reaction is approximately Which is the strongest conjugate base in this reaction?
Chemistry-General
Chemistry-
If equal volumes of 
and NaF solutions are mixed, which of these combinations will not give a precipitate?
If equal volumes of and NaF solutions are mixed, which of these combinations will not give a precipitate?
Chemistry-General
Chemistry-
The amount of sodium hydrogen carbonate, 
, in an antacid tablet is to be determined by dissolving the tablet in water and titrating the resulting solution with hydrochloric acid Which indicator is the most appropriate for this titration?
The amount of sodium hydrogen carbonate, , in an antacid tablet is to be determined by dissolving the tablet in water and titrating the resulting solution with hydrochloric acid Which indicator is the most appropriate for this titration?
Chemistry-General
Chemistry-
The correct order of basic strength is
The correct order of basic strength is
Chemistry-General
Chemistry-
4Three sparingly soluble salts that have same solubility products are given below:
II 
III 
Their solubilities in a saturated solution will be such that:
4Three sparingly soluble salts that have same solubility products are given below:
II
III
Their solubilities in a saturated solution will be such that:
Chemistry-General
Chemistry-
A) The aqueous solution of 
is alkaline in nature.
R) Acetate ion undergoes an ionic hydrolysis
A) The aqueous solution of is alkaline in nature.
R) Acetate ion undergoes an ionic hydrolysis
Chemistry-General
Chemistry-
A) At 
, the pH of 
M HCl is 8.
R) pH of acidic solution is always below 7 at
A) At , the pH of M HCl is 8.
R) pH of acidic solution is always below 7 at
Chemistry-General
Chemistry-
A) When small amount of an acid or base is added to pure water its pH undergoes a change
R) Addition of an acid or a base increases the degree of ionization of water
A) When small amount of an acid or base is added to pure water its pH undergoes a change
R) Addition of an acid or a base increases the degree of ionization of water
Chemistry-General
Chemistry-
The weak acid, HA has a of 
. If 
of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closet to:
The weak acid, HA has a of . If of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closet to:
Chemistry-General
Chemistry-
The ionization constant of ammonium hydroxide is 
at 
. Hydrolysis constant of ammonium chloride is:
The ionization constant of ammonium hydroxide is at . Hydrolysis constant of ammonium chloride is:
Chemistry-General
Chemistry-
The molar solubility (in mol 
) of a sparingly soluble salt 
is The corresponding solubility product is given by the relation
The molar solubility (in mol ) of a sparingly soluble salt is The corresponding solubility product is given by the relation
Chemistry-General
