Flashcards in General Chemistry Acids/ Bases Deck (14):
List of strong acids?
H2SO4 > HI > HBr > HCl > HNO3
Relationship between Ka and pKa
Strong acids have high Ka and low pKa.
Acidity trend in groups and periods.
Groups increase acidity down.
Periods increase acidity going right.
General rules for oxyacid acidity.
More electronegative the central atom, the more acidic.
The more oxygens bound to central atom, the more acidic.
Excess oxygen can be determined by subtracting H from O.
Non metal oxides act as:
lewis acids, extra lone pair acceptors; acidic.
metal oxides acts as
lewis base, extra lone pair donator; basic. react to make metal hydroxides.
The first hydrogen removed is more acidic than the second. Therefore, pka1 is lower than pka2.
What kind of salt forms when a strong acid combines with a strong base?
Neutral salt plus water.
What kind of salt forms when a strong base combines with a weak acid? Vise Versa
Basic salt plus water.
Acid salt plus water.
What is a buffer & how can you make one?
Buffers resist changes in the pH.
1. Add roughly equal moles of conjugate pair of weak acid & weak base.
2. Titration of 1/2 strong acid/base with weak acid/base.
What occurs in respiratory acidosis
Retention of CO2, ph decreases
What occurs in respiratory alkalosis
Loss of co2 , increase pH.
What is metabolic acidosis
Loss of HCO3-, blood pH decrease