38. If 125 mL of concentrated sulfuric acid solution (density
1.84 g/mL. 98.3% H2SO4 by mass) is diluted to a final volume of 3.01 L, calculate the following information.
a. the mass of pure H2SO4 in the 1 25-mL sample.
b. the molarity of the concentrated acid solution
c. the molarity of the dilute acid solution
d. the normality of the dilute acid solution
e. the quantity of the dilute acid solution needed neutralize
45.3 mL of 0.532 M NaOH solution
(a)
Interpretation:
The mass of pure
Concept Introduction:
The mass percentage of a compound present in a solution is calculated by dividing the mass of the compound present in the solution by the total mass of the solution and then multiplying it by
Where,
The volume of the concentrated sulfuric acid solution is
The density of the concentrated sulfuric acid solution is
The mass percentage of
The relation between mass, volume and density of a substance is given as,
Where,
Substitute the value of density and volume of sulfuric acid solution in the above equation.
The formula for mass percentage is represented as,
Where,
(b)
Interpretation:
The molarity of given concentrated acid solution is to be calculated.
Concept Introduction:
The molarity of a solution is defined as the number of mole of solute dissolved in one liter of the solution. The formula for molarity is given as,
Where,
(c)
Interpretation:
The molarity of the given acid solution after dilution is to be calculated.
Concept Introduction:
The molarity of a solution is defined as the number of moles of solute dissolved in one liter of the solution. The formula for molarity is given as,
Where,
(d)
Interpretation:
The normality of the dilute acid solution is to be calculated.
Concept Introduction:
The normality of a solution is defined as the gram equivalent weight of a solute dissolved in one liter of the solution. The normality of solution is given as:
Where,
(e)
Interpretation:
The volume of dilute acid solution required to neutralize
Concept Introduction:
Neutralization is the process in which an acid and base react with each other to give salt and water. The general reaction of acid and base is represented as,
The molarity of a solution is defined as the number of moles of solute dissolved in one liter of the solution. The formula for molarity is given as,
Where,
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