Respuesta :
Answer : The number of moles of hydronium ion is, [tex]2.2\times 10^{-7}mole[/tex]
Explanation :
First we have tom calculate the concentration of hydrogen ion or hydronium ion.
pH : It is defined as the negative logarithm of hydrogen ion or hydronium ion concentration.
[tex]pH=-\log [H_3O^+][/tex]
Given:
pH = 7.35
[tex]7.35=-\log [H_3O^+][/tex]
[tex][H_3O^+]=4.47\times 10^{-8}mol/L[/tex]
Now we have to calculate the moles of hydronium ion.
[tex]\text{Moles of }H_3O^+=\text{Molarity of }H_3O^+\times \text{Volume of solution}[/tex]
Now put all the given values in this expression, we get:
[tex]\text{Moles of }H_3O^+=(4.47\times 10^{-8}mol/L)\times (5.0L)[/tex]
[tex]\text{Moles of }H_3O^+=2.2\times 10^{-7}mole[/tex]
Therefore, the number of moles of hydronium ion is, [tex]2.2\times 10^{-7}mole[/tex]
