Respuesta :
Answer: The concentration of NaOH solution is 0.194 M
Explanation:
To calculate the number of moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]
Given mass of KHP = 0.294 g
Molar mass of KHP = 204.22 g/mol
Putting values in above equation, we get:
[tex]\text{Moles of KHP}=\frac{0.294g}{204.22g/mol}=0.00144mol[/tex]
The chemical reaction follows the equation:
[tex]KHC_8H_4O_4(aq.)+NaOH\rightarrow KNaC_8H_4O_4(aq.)+H_2O(l)[/tex]
By Stoichiometry of the reaction:
1 mole of KHP reacts with 1 mole of NaOH.
So, 0.00144 moles of KHP will react with = 0.0144 of KOH.
To calculate the molarity of NaOH, we use the equation:
[tex]\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}[/tex]
We are given:
Moles of KOH = 0.00144 moles
Volume of solution = 7.42ml = 0.00742L (Conversion factor: 1L = 1000 mL)
Putting values in above equation, we get:
[tex]Molarity=\frac{0.00144mol}{0.00742L}=0.194M[/tex]
Hence, the molarity of NaOH solution is 0.194 M
The concentration of the NaOH solution used in complete titration has been 0.194 M.
The reaction of KHP with NaOH has been the neutralization reaction that results in the formation of salt and water.
The concentration of KHP solution has been:
Molarity = [tex]\rm \dfrac{weight}{Molecular\;weight}\;\times\;\dfrac{1000}{Volume\;(ml)}[/tex]
Molarity of KHP = [tex]\rm \dfrac{0.294}{204.2}\;\times\;\dfrac{1000}{250}[/tex]
Molarity of KHP = 0.0057 M
The concentration of the KHP solution has been 0.0057 M.
For the neutralization reaction in complete titration:
Molarity of acid [tex]\times[/tex] Volume of acid = Molarity of base [tex]\times[/tex] Volume of base
Substituting the values from the question:
0.0057 M [tex]\times[/tex] 250 ml = Molarity of NaOH [tex]\times[/tex] 7.42 ml
1.439 = Molarity of NaOH [tex]\times[/tex] 7.42 ml
Molarity of NaOH = 0.194 M.
The concentration of the NaOH solution used in complete titration has been 0.194 M.
For more information about complete titration, refer to the link:
https://brainly.com/question/13679687
