Penjelasan:

a. Bo K = +1 (krn gol IA)

Bo O = -2

Bo total dlm senyawa = 0

+1 + x + 4(-2) = 0

x = 8 - 1

BoMn = +7

b. Bo H = +1 (krn gol IA)

Bo O = -2

Bo total dlm senyawa = 0

2(+1) + x + 3(-2) = 0

x = 6 - 2

Bo Si = +4

c. Bo Na = +1 (krn gol IA)

Bo O = -2

Bo total dlm senyawa = 0

2(+1) + 2x + 3(-2) = 0

2x = 6 - 2

x = 2

Bo S = +2

d. Al₂(SO₄)₃ → Al⁺³ + SO₄⁻²

Bo total dlm ion SO₄ = -2

x + 4(-2) = -2

x = 8 - 2

x = 6

Bo S = +6

e. SO₄⁻²

Bo total dlm ion SO₄ = -2

x + 4(-2) = -2

x = 8 - 2

x = 6

Bo S = +6

f. PO₄⁻³

Bo total dlm ion PO₄ = -3

x + 4(-2) = -3

x = 8 - 3

x = 5

Bo P = +5