Unit 2a: Chem equilibrium

Question 1

What is the equilibrium expression for the reaction shown?

Answer 1

Question 2

What does magnitude of K tell us about the position of equilibrium?

Answer 2

K much> 1 : lies to right

K much< 1 : lies to left

Question 3

What value do pure liquids and solids have in equilibrium expresion?

Answer 3

1

Question 4

What is meant by amphoteric?

Answer 4

Can act as an acid or a base

Question 5

Equilibrium expression for dissociation of water

Answer 5

Question 6

What is K_w

Answer 6

Question 7

What is relationship between pH and H₃O⁺ concentration?

Answer 7

Question 8

Concentrations of OH^- and H₃O⁺ at pH 7 ( 25 degrees)

Answer 8

Both = 10^-7 mol l^-1

Question 9

What effect does pressure have on equilibrium constant?

Answer 9

K is unaffected by pressure

Question 10

Bronsted -Lowry definition of acids and bases

Answer 10

Question 11

Acid dissociation constant

Answer 11

Question 12

What is composition of a buffer solution?

Answer 12

Question 13

How does acidic buffer work?

Answer 13

Question 14

How does basic buffer work?

Answer 14

Question 15

pH of a buffer solution

Answer 15

Question 16

What is an indicator?

Answer 16

Question 17

What is K_in ?

Answer 17