Final answer:
The ionic equation for the neutralization reaction between baking soda and sour milk can be written as 2H+ + 2OH- -> 2H2O. This equation represents the formation of water and the neutralization of acid and base.
Step-by-step explanation:
The ionic equation for the neutralization reaction between 1/2 teaspoon of baking soda (sodium bicarbonate, NaHCO3) and one cup of sour milk (lactic acid, CH3CH(OH)COOH) can be written as:
2H+ + 2OH- → 2H2O
This equation represents the formation of water from the reaction between the hydrogen ions (H+) from the lactic acid and the hydroxide ions (OH-) from the baking soda. This reaction neutralizes the acid and base, resulting in a pH closer to neutral.