Level 2 Chemistry

Question 1

Calculate pH

Answer 1

-log( [H] )

no units

Question 2

Calculate K_w

pH of acid or base completely dissociated in water

Answer 2

1x10^-14 = [H] [OH] molL^-1

Question 3

Exothermic or endothermic based on K_c

Answer 3

K_cincrease tends towards products

K_c decreases tends towards reactants

Temperature + = Endothermic

Temperature - = Exothermic

Question 4

[H]

Concentration of H (H₃O)

(opposite of pH)

Answer 4

10^-pH

Question 5

Calculate molar mass

Answer 5

n = m/M

n = quantity in g mol^-1

m = mass in g

M = moles