Based on the formula for ethanoic acid ( acetic acid), demonstrate how it behaves as an Arrhenius acid. Show how the hydrogen (proton ) from the OH in the COOH group will ionize in solution To form and form a hydrogen ion H+ and the CH3COO- will form the acetate ion. The proton will bond with the water and form the acid hydronium ion H3O+. Indicate how all the organic acids will ionize to some extent to form the hydronium ion and an anion.
Define a Bronsted-Lowry acid as a proton donor and a B-L base as a proton acceptor. Use HCl dissociated in water as the example. Write the formula for the dissociation of HCl + H2O ----> H+ + Cl- ions. Show that the H+ is accepted by the water molecule and forms the H3O+ ion (hydronium). According to the B-L theory, the HCl is donating the proton to the water, making the HCl an acid, and the water is accreting the proton, making it an B-L base. Show how the reverse reaction which is occurring at the the same time shows the H3O+ donating the proton to the Cl making the water an acid and the Cl a base.
Define and discuss the carboxylic acid group. Show the structural formula for the functional group and present it using molecular models. Discuss the acid nomenclature by using the root name of the alkane, removing the last e and substituting the letters OIC and then the name acid. Example: the acid from methane becomes methanOIC acid. Discuss the formula and properties of the first 3 alkane acids.
Begin a discussion regarding the chemical properties and structures of organic acids. Define the functional group found in all organic acids, and sketch their structure. Discuss some simple alkane organic acids, sketch the structural formula and discuss nomenclature
Assignment
Structural formula nomenclature determine from chemistry Hand out book
Session Minutes
45
Minutes Student Attended
45
Lesson Comments
Ben was not feeling well. I had to let him rest, sleep, for most of the class. He has had a medication dose change
Place a series of known acids and bases in a droplet testing tray. Set up one depression to act as a control for acids and one for bases. Test all the substances using litmus paper and phenolphthalein and record the results for a positive test. Test some well known household items also, like vinegar, milk, and coffee.
