Question

An Erlenmeyer flask contains 25.00 mL of 0.10 M HCl. What is the pH of the solution?

–1.0 0.40 1.0 –1.6

Answer 1

c=0.10 mol/l

pH=-lg[H⁺]

HCl = H⁺ + Cl⁻

pH=-lgc

pH=-lg0.10=1.0

pH=1.0

Answer 2

The pH of the solution is 1.

Step-by-step explanation:

Concentration of HCl solution = 0.10 M

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

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

`[HCl]=[H^+]=0.10 M`

The pH of the solution is defined as negative logarithm of
`H^+` ions in the solution.Mathematically written as

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

`pH=-\log[0.10 M]=1`

The pH of the solution is 1.