Acetic Acid (HC 2 H 3 O 2 ) has 0.767% dissociation in a 0.300M solution at 25°C. Find the Ka for acetic acid at 25°C and the solution’s pH
Acids that can give up MORE than one H + ion Diprotic—2 H + ions capable of ionizing Triprotic—3 H + ions capable of ionizing **Each H + dissociates separately and in a separate step--- Specific Ka value for each step.
Ka 1 >>> Ka 2 generally for these acids Most of the H + dissociates in the 1 st dissociation. **Use Ka from the 1 st dissociation to calculate [H + ] and pH
2H 2 CO 3 H + + HCO 3 - (Ka 1 =4.3x10 -7 ) HCO 3 - H + + CO 3 2- (Ka 2 =4.7x )
Calculate the pH of a 0.125M maleic acid solution. HOOCCH=CHCOOH + H 2 O H 3 O + + HOOCCH=CHCOO - (Ka = 1.2 x ) HOOCCH=CHCOO - + H 2 O H 3 O OOCCH=CHCOO - (Ka = 4.7 x )
Finish Weak Acid/Base Problems—Friday Read over lab procedure