pH

Question 1

pH = 7.00 is

Answer 1

Neutral

Question 2

pH < 7.00 is

Answer 2

Acidic

Question 3

pH > 7.00 is

Answer 3

Basic

Question 4

How many decimal places do you go out for pH regardless of sig. figs?

Answer 4

2 decimal places

Question 5

Equation to find pH (2)

Answer 5

1) pH = -log[H3O+]
2) pH = pKw - pOH

Question 6

At room temperature what does Kw equal?

Answer 6

1.0 x 10^-14

Question 7

What does pKW equal?

Answer 7

14

Question 8

Equation to find pOH (2)

Answer 8

1) pOH = -log[OH-]
2) pOH = pKw - pH

Question 9

Equation to find pKw (2)

Answer 9

1) pKw = -log(kw)
2) pKw = pH + pOH

Question 10

Equations to find [H3O+] (2)

Answer 10

1) [H3O+] = 10^(-pH)
2) [H3O+] = (Kw)/[OH-]

Question 11

Equations to find Kw (1)

Answer 11

Kw = [H3O+]eq[OH-]eq

Question 12

Equations to find [OH-] (2)

Answer 12

1) [OH-] = 10^(-pOH)
2) [OH-] = (kw)/[H3O+]

Question 13

What do strong acids do?

Answer 13

Completely ionize into H3O+ and a weak conjugate base (WCB).

Question 14

What happens with a weak conjugate base (WCB)?

Answer 14

WCBs have NO affinity for protons and don’t accept them. Reaction can not go reverse, only forward.

Question 15

What do strong bases do?

Answer 15

Strong bases completely dissociate into OH- and a metal cation.

Question 16

What happens with metal cations?

Answer 16

Metal cations can’t donate protons, so the reaction can’t go in reverse.