Cooks use baking soda to make cakes light and fluffy. You might have used baking soda yourself. Baking soda is NaHCO3. A 0.19 M solution of baking soda in water has a [H+] of about 4.0 × 10–8. (You may prefer to think of the hydronium ion concentration, [H3O+], as 4.0 × 10–8.) Write the formula for the calculation of pH, and then show each step as you calculate the pH of a 0.19 M solution of baking soda.