Question

Calculate the pH for the following weak acids
.01M Formic acid (HCHO2) aka= 1.7 x 10^-4

Answer 1

pH = 2.88

Step-by-step explanation:

For a weak acid solution, the pH can be calculated using the following formulas:

• [H⁺] =
  `√(Ka*C)`

• pH = -log[H⁺]

Where Ka =
`10^(-pKa)` and C is the molar concentration.

We are given Ka and C by the problem, meaning we can now proceed to calculate [H⁺]:

• [H⁺] =
  `\sqrt{1.7*10^(-4)*0.01}`

• [H⁺] = 0.0013 M

Finally we calculate the pH:

• pH = - log (0.0013) = 2.88