Cooks use baking soda to make cakes light and fluffy. You might have used baking soda yourself. Baking soda is NaHCO3. A 0.1 M solution of baking soda in water has a [H+] of about 4.0 × 10–9. (You may prefer to think of the hydronium ion concentration, [H3O+], as 4.0 × 10–9.)

Write the formula for the calculation of pH, and then show each step as you calculate the pH of a 0.1 M solution of baking soda.

I am totally confused on this one. Could you also explain what you're doing as well?

Thank you

Formula for pH is pH = -log [H+]

you use 4.0x10^-9 and substitute in for [H+]

Fromula looks like this:
pH = -log (4.0x10^-9) - from here different calculators will require different buttons to push to get the answer

Solved out:
pH = -log (4.0x10^-9)
pH = -(-8.398) = 8.398 is the pH

Answer Link

aliasger2709 aliasger2709 · Answer 2 · 2022-04-13T07:52:42+02:00

pH is the potential of the hydronium ion concentration of the solution. The pH of the 0.1 M solution of baking soda will be 8.398.

What is pH?

pH is the measure of the hydrogen or the hydronium ion concentration in an aqueous solution. The pH is calculated as:

[tex]\rm pH = \rm - log [H^{+}][/tex]

Given, the concentration of hydronium ion, [tex]4.0 \times 10^{-9}.[/tex]

Substituting value in the above equation:

[tex]\begin{aligned}\rm pH &= \rm - log [H^{+}]\\\\&= \rm - log (4.0 \times 10^{-9})\\\\&= 8.398\end{aligned}[/tex]

Therefore, 8.398 is the pH of the baking soda solution in water.

Learn more about pH here:

https://brainly.com/question/4424346