Then we took some notes.
A. What are some properties of acids?
-reacts w/ metal to create H2 (g)
-turn litmus paper red
-react w/ carbonates to create CO2 (g)
*** IMPORTANT -creates H+ in water
-pH UNDER 7
B. What happens when acids dissociate in water?
HCl--> H+ + Cl-
HNO3 --> H+ + NO3-
A. What are some properties of bases?
-turns litmus paper blue
-turns pht (phenolphthalein) pink
*** IMPORTANT -creates OH- in water
-pH ABOVE 7
B. What happens when bases dissociate in wateR?
NaOH--> Na+ + OH-
NH3--> Na4+ + OH- (trick one!!)
3. WEAK AND STRONG ACIDS AND BASES
-Strong acids& bases completely dissociate in water (split apart)
-Weak acids&bases only partially separate in water.
At the end of class Mr. Tucker handed us a notecard which we wrote A on one side and B on the other, and he asked us questions and we had to decided which it was A, for acid, or B, for Base.
We received no additional additional homework except to finish the lab reports on moodle which are due tomorrow (Friday, April 8th, 2011)