Answer:
The pH of the solution is 2.26 .
Explanation:
Mass of HCl = 200 mg = 0.200 g
1 mg = 0.001 g
Moles of HCl =[tex]n=\frac{0.200 g}{36.5 g/mol}=0.005479 mol[/tex]
Volume of the solution ,V= 1 L
Molarity of HCl solution = [tex]\frac{n}{V}[/tex]
[tex][HCl]=\frac{0.005479 mol}{1 L}=0.005479 mol/L[/tex]
1 mole of HCk gives 1 mole of hydrogen ion and 1 mole of chloride ions.
[tex][HCl]=[H^+]=[Cl^-]=0.005479 mol/L[/tex]
The pH of the solution is negative logarithm of hydrogen ion concentration:
[tex]pH=-\log[H^+][/tex]
[tex]pH=-\log[0.005479 mol/L]=2.26[/tex]
The pH of the solution is 2.26 .
