M6 Topic 2 Using Bronsted-Lowry Theory Part 2

Question 1

what are amphiprotic substances

Answer 1

substances that can donate and accept electrons

Question 2

list an amphiprotic substance

Answer 2

Water (H₂O)

Question 3

what is an example of water acting as a base

Answer 3

H2O(l) + HCl(aq) → H3O⁺(aq) + Cl⁻(aq)

Question 4

what is an example of water acting as a acid

Answer 4

H2O(aq) + NH3(aq) → NH4⁺(aq) + OH⁻(aq)

Question 5

what is the general composition of a neutral solution

Answer 5

equal amounts of [H3O⁺] ,[OH⁻]

Question 6

what is the general composition of a acidic solution (2)

Answer 6

• higher [H3O⁺] concentration

- Lower [OH⁻] concentration

Question 7

what is the general composition of a basic solution (2)

Answer 7

• Lower H3O⁺ concentration

- Higher OH⁻ concentration

Question 8

what does each value in a periodic table mean (3)

Answer 8

• 7 = neutral solution
• < 7 = acidic solution
• > 7 = Basic solution

Question 9

how do you calculate pH (2)

Answer 9

• find the concentration of H⁺ (H3O⁺)

- pH = - log [H⁺] ([ ] means concentration)

Question 10

How do you calculate concentration from pH

Answer 10

[H⁺] = 10⁻ᵖᴴ

Question 11

how do you calculate pOH (2)

Answer 11

• find the concentration of OH⁻

- pOH = - log [OH⁻] ([ ] means concentration)

Question 12

How do you calculate concentration from pOH

Answer 12

[OH⁻] = 10⁻ᵖᴼᴴ

Question 13

what is the relation between pH and pOH

Answer 13

pH + pOH = 14