Write the molecular formula of following compounds using criss cross method.
Magnesium bicarbonate, Hydrogen peroxide, Sodium sulfate, cuprous oxide, cupric oxide, Ferric sulfate, ferrous sulfate, ammonium carbonate, Hydrogen chloride, calcium carbonate.
Answers
Explanation:
Solution:
(a) Potassium Chloride:
Symbol Valency
Potassium K 1+
Chlorine Cl 1-
Positive ions are written first
On interchanging the valencies
Formula = KCl_{ }KCl
(b) Sodium Bromide
Symbol Valency
Sodium Na 1+
Bromide Br 1-
Positive ions are written first
On interchanging the valencies
Formula = NaBrNaBr
(c) Potassium Nitrate
Symbol Valency
Potassium K 1+
Nitrate [[> widget id="7" <]] 1-
Positive ions are written first
On interchanging the valencies
Formula = K\left[NO_3\right]K[NO
3
]
(d) Calcium hydroxide
Symbol Valency
Calcium Ca 2+
Hydroxide OH 1-
Positive ions are written first
On interchanging the valencies
Formula = Ca\left[OH\right]_2Ca[OH]
2
(e) Calcium bicarbonate
Symbol Valency
Calcium Ca 2+
Bicarbonate [[> widget id="10" <]] 1-
Positive ions are written first
On interchanging the valencies
Formula = NO_3NO
3
(f) Sodium Bisulphate
Symbol Valency
Sodium Na 1+
Bisulphate [[> widget id="13" <]] 1-
Positive ions are written first
On interchanging the valencies
Formula = Na\left[HSO_4\right]Na[HSO
4
]
(g) Potassium Sulphate
Symbol Valency
Potassium K 1+
Sulphate [[> widget id="16" <]] 2-
Positive ions are written first
On interchanging the valencies
Formula = K_2\left[SO_4\right]K
2
[SO
4
]
(h) Zinc Hydroxide
Symbol Valency
Zinc Zn 2+
Hydroxide OH 1-
Positive ions are written first
On interchanging the valencies
Formula = Zn\left[OH\right]_2Zn[OH]
2
(i) Potassium permanganate
Symbol Valency
Potassium K 1+
Permanganate [[> widget id="21" <]] 1-
Formula = K\left[MnO_4\right]K[MnO
4
]
(j) Potassium dichromate
Symbol Valency
Potassium K 1+
Dichromate [[> widget id="24" <]] 2-
Positive ions are written first
On interchanging the valencies
Formula= K_2\left[Cr_2O_7\right]K
2
[Cr
2
O
7
]
(k) Aluminium hydroxide
Symbol Valency
Aluminium Al 3+
Hydroxide [OH] 1-
Positive ions are written first
On interchanging the valencies
Formula = Al\left[OH\right]_3Al[OH]
3
(l) Magnesium nitride
Symbol Valency
Magnesium Mg 2+
Nitride N 3-
Positive ions are written first
On interchanging the valencies
Formula = Mg_3N_2Mg
3
N
2
(m) Sodium zincate
Symbol Valency
Sodium Na 1+
Zincate [[> widget id="31" <]] 2-
Positive ions are written first
On interchanging the valencies
Formula = Na_2\left[ZnO_2\right]Na
2
[ZnO
2
]
(n) Copper [II] oxide
Symbol Valency
Copper Cu 2+
Oxide O 2-
Positive ions are written first
On interchanging the valencies
Formula = CuOCuO
(o) Copper [I] sulphide
Symbol Valency
Copper Cu 1+
Sulphide S 2-
Positive ions are written first
On interchanging the valencies
Formula = Cu_2SCu
2
S
(p) Iron [III] chloride
Symbol Valency
Iron Fe 3+
Chloride Cl 1-
Positive ions are written first
On interchanging the valencies
Formula = FeCl_3FeCl
3
(q) Iron [II] hydroxide
Symbol Valency
Iron Fe 2+
Hydroxide OH 1-
Positive ions are written first
On interchanging the valencies
Formula =Fe\left[OH\right]_2Fe[OH]
2
(r) Iron [III] sulphide
Symbol Valency
Iron Fe 3+
Sulphide S 2-
Positive ions are written first
On interchanging the valencies
Formula = Fe_2S_3Fe
2
S
3
(s) Iron [III] oxide
Symbol Valency
Iron Fe 3+
Oxide O 2-
Positive ions are written first
On interchanging the valencies
Formula = Fe_2O_3Fe
2
O
3
Answer:
magnesium bicarbonate. c2h2mg6
hydrogen peroxide. H2 O2
sodium sulphate. Na2so4
cuprous oxide. cu2 H2O
cupric oxide. cu6
ferric sulphate. fe2 (so4) 3
hydrogen chloride. HCL
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