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 and water has a [h+] of about 4.0 x 10^-9. (you may prefer to think of the hydronium ion concentration, [h3o+], as 4.0 x 10-9.) write the formula for the calculation of ph, and then show each job as you calculate the ph of 0.1 m solution of baking soda.,