Chem 12: Thurs, Apr 25, 2013

Today we worked on the relative strengths of acids and bases! Complete problems on page 133 #38-40(abcd), 41-44.

We also worked on a review written on the board. Here are the answers to the questions:

1. 2NaOH + H2SO4 --> 2H2O + Na2SO4
2. H+ cannot exist in reality because it is a naked proton which has a very high positive charge. It must find a negative charge and since acids dissolve in water, it will attach to H2O making hydronium ion, H3O+
3. Arrhenius Theory states: Acids give off H+ and Bases give off OH-. Bronsted-Lowry Theory states: Acids donate protons and Bases accept protons.
4. Strongest to weakest acids: HIO3, HF, HCOOH, H2S, H2PO42-, HCO3-
5. Strongest to weakest bases: SO32-, HCO3-, NO2-, H2PO4-, IO3-, H2O
6. [H+] = 2.84 M; [OH-] = 3.52 x 10^-15
7. Conjugate acids: H2CO3, HIO3

Tomorrow is a quiz up to and including Kw.

Miss B