
The amount of formed upon mixing of solution with of solution will be:(given the molecular weight of )
(A)
(B)
(C)
(D)
Answer
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Hint: Percentage by weight (w/W) is the mass of solute present in the given mass of solution, this is known as the weight fraction of solute.
% concentration (w/W) is generally defined x gram of solute is present in the 100gm of solution.
Complete answer:
To calculate the weight of firstly we will calculate the number of moles of each reactant in the solution.
For means of is dissolved in of water.
Since so, amount of present in the 100gm of water solution will be-
From unitary method
if of contains = of
of water will contain = of
of water will contains =
=
Thus number of mole of
In the same way we will calculate the moles for -
9.8% means of is dissolved in of water.
Since so, amount of present in the 50gm of water solution
From unitary method
if of contains = of
of water will contain = of
of water will contains =
=
Thus number of mole of
The overall reaction is the solution is
Since is the limiting quantity so it will be the limiting reagent
So, of will react with the of and it will form of .To calculate the weight of we will apply mole formula. So, after putting the value of the number of moles and molar mass of in the e.q…. (1)
So, option (B) will be the correct answer.
Note:
Limiting reagent is the reagent that is entirely consumed when a reaction goes to completion. If mass of the two or more reactants are given, the amount of product formed depends upon the amount of limiting reagent.
% concentration (w/W) is generally defined x gram of solute is present in the 100gm of solution.
Complete answer:
To calculate the weight of
For
Since
From unitary method
if
=
Thus number of mole of
In the same way we will calculate the moles for
9.8%
Since
From unitary method
if
=
Thus number of mole of
The overall reaction is the solution is
Since
So,
So, option (B) will be the correct answer.
Note:
Limiting reagent is the reagent that is entirely consumed when a reaction goes to completion. If mass of the two or more reactants are given, the amount of product formed depends upon the amount of limiting reagent.
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