Answer
The lewis structure of lactic acid can be seen in the image below.
Work Step by Step
Begin by making the parent chain. Always remember to start from the left side of the molecular formula. Add the other molecules which are not H and C (in this example it is only O). Then, add H atoms and make sure that each carbon atom have four bonds. Lastly, check to see if all atoms have the correct number of bonds. Give each O atom two electron pairs to complete the octet.
Carbon = 4 bonds
Hydrogen = 1 bond
Oxygen = 2 bonds
