General Chemistry Acids/ Bases Flashcards Preview

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Flashcards in General Chemistry Acids/ Bases Deck (14):
1

List of strong acids?

H2SO4 > HI > HBr > HCl > HNO3

2

Relationship between Ka and pKa

Strong acids have high Ka and low pKa.

3

Acidity trend in groups and periods.

Groups increase acidity down.
Periods increase acidity going right.

4

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.

5

Non metal oxides act as:

lewis acids, extra lone pair acceptors; acidic.

6

metal oxides acts as

lewis base, extra lone pair donator; basic. react to make metal hydroxides.

7

Polyprotic Pkas

The first hydrogen removed is more acidic than the second. Therefore, pka1 is lower than pka2.

8

What kind of salt forms when a strong acid combines with a strong base?

Neutral salt plus water.

9

What kind of salt forms when a strong base combines with a weak acid? Vise Versa

Basic salt plus water.
Acid salt plus water.

10

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.

11

What occurs in respiratory acidosis

Retention of CO2, ph decreases

12

What occurs in respiratory alkalosis

Loss of co2 , increase pH.

13

What is metabolic acidosis

Loss of HCO3-, blood pH decrease

14

What is metabolic alkalosis

Loss of h3o+ , blood pH increases