Question

What is the pH of 0.000134 M solution of HCI?

Answer 1

Answer: The pH of 0.000134 M solution of HCl is 3.873.

Step-by-step explanation:

When HCl dissociates in water then it will give hydrogen and chlorine ions. The reaction will be as follows.

`HCl \rightarrow H^(+) + Cl^(-)`

This means that 1 mole of HCl is giving 1 mole of hydrogen ions on dissociation.

Hence, pH of the given solution will be calculated as follows.

pH =
`-log [H^(+)]`

=
`-log (0.000134)`

= 3.873

Thus, we can conclude that the pH of 0.000134 M solution of HCl is 3.873.

Answer 2

Answer: The pH will be 3.87

Step-by-step explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

`pH=-\log [H^+]`

`HCl\rightarrow H^++Cl^(-)`

According to stoichiometry,

1 mole of
`HCl` gives 1 mole of
`H^+`

Thus
`0.000134` moles of
`HCl` gives =
`(1)/(1)* 0.000134=0.0001342` moles of
`H^+`

Putting in the values:

`pH=-\log[0.000134]`

`pH=3.87`

Thus the pH will be 3.87