Lecture 12/3/2024

Question 1

______- mixture of weak acid and weak base

Answer 1

buffer

Question 2

What is the henderson-Hasselbach equation?

Answer 2

ph= pKa + log [base]/[acid]

Question 3

buffers have a ______, which is the ph range for which a buffer can resist change

Answer 3

compacity

Question 4

_______- solution of known concentration of base or acid

Answer 4

titrant

Question 5

_______- slowly added to another solution of acid (or base)

Answer 5

analyte

Question 6

______- a colored substance that tells us when a substance has reached its endpoint

Answer 6

indicator

Question 7

T or F: There are different pH indicators for each pH range

Answer 7

True

Question 8

The indicator will change _______ to show equivalence point

Answer 8

color

Question 9

At the ______ _______, the moles of the acid are equal to base

Answer 9

equivalence point

Question 10

pH at the equivalence point is ___

Answer 10

7

Question 11

SA+ SB _____ 7

Answer 11

=

Question 12

WA + SB _____ 7

Answer 12

>

Question 13

WB+ SA ______7

Answer 13

<

Question 14

To determine the pH of a weak acid, what do you always need?

Answer 14

The pKa or Ka value