Question

Tolong bantuannya, no 7&9​

Answer 1

7. a. As2O3
2 x bo As + 3 x (-2) = 0
2 x bo As - 6 = 0
2 x bo As = 6
bo As = +3

Catatan:
Untuk beberapa senyawa tertentu seperti 7a, bisa dikerjakan melalui reaksi persilangan

As2O3 → 2As 3+ + 3O 2-

Karena biloks O selalu -2, bisa disimpulkan bahwa biloks As adalah +3

Contoh lainnya seperti
Mg3N2 → 3Mg 2+ + 2N 3-
CaCl2 → Ca 2+ + 2Cl-
dll

b. Na3AsO3
3 x 1 + bo As + 3 x (-2) = 0
3 + bo As -6 = 0
bo As = +3

c. AsH4
bo As + 4 x (1) = 0
bo As = -4

9. K = kation, A = Anion

a. K = Kalsium : Ca2+
A = Nitrat : NO3 -

b. K = Perak : Ag+
A = Hidroksida : OH-

c. K = Amonium : NH4 +
A = Hidroksida : OH-

d. K = Kalium : K+
A = Permanganat : MnO4 -

e. K = Seng : Zn2+
A = Sulfat : SO4 2-