Respuesta :
Answer:
89.94 %
Explanation:
Considering:
[tex]Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}[/tex]
Or,
[tex]Moles =Molarity \times {Volume\ of\ the\ solution}[/tex]
Given :
For HCl :
Molarity = 0.500 M
Volume = 22.5 mL
The conversion of mL to L is shown below:
1 mL = 10⁻³ L
Thus, volume = 22.5×10⁻³ L
Thus, moles of HCl :
[tex]Moles=0.500 \times {22.5\times 10^{-3}}\ moles[/tex]
Moles of HCl = 0.01125 moles
The reaction of NaOH and HCl is:
NaOH + HCl ⇒ NaCl + H₂O
Moles of HCl = Moles of NaOH
Thus, Moles of NaOH = 0.01125 moles
Molar mass of NaOH = 39.997 g/mol
The formula for the calculation of moles is shown below:
[tex]moles = \frac{Mass\ taken}{Molar\ mass}[/tex]
Thus,
[tex]0.01125\ moles= \frac{Mass}{39.997\ g/mol}[/tex]
[tex]Mass of NaOH= 0.4497\ g[/tex]
Total mass = 0.500 g
% purity = ( 0.4497 / 0.500 ) × 100 = 89.94 %
The study of chemicals and bonds is called chemistry. There are different types of elements and these are metals and nonmetals.
The correct answer is 0.500g.
What is titration?
- Titration is a common laboratory method of quantitative chemical analysis to determine the concentration of an identified analyte
- A reagent termed the titrant or titrator is prepared as a standard solution of known concentration and volume.
- The titrant reacts with a solution of analyte to determine the analyte's concentration.
According to the question, the formula is used to solve the question is as follows:-
[tex]moles= molarity* volume[/tex]
The data is given as follows:-
- Molarity = 0.500 M
- Volume = 22.5 mL
Hence, the moles will be:-
[tex]0.500*22.5*10^{-3}[/tex] = 0.011225
The reaction of NaOH and HCl is:
[tex]NaOH + HCl ----> NaCl + H_2O[/tex]
- Moles of HCl = Moles of NaOH
Thus, the mass of the NaOH
[tex]mass = 0.1125*39.997 \\=0.500g[/tex]
Hence, the correct answer is 0.500g.
For more information about the moles, refer to the link:-
https://brainly.in/question/9531558
