Answer:
Step-by-step explanation:
Data Given:
Names of the compounds
Formula of the compounds = ?
Solution:
To write a formula for a compound we have to know the symbols of the element (atom) and its valency (combing power of an atom).
So then we write the symbols of the elements in combine form that the whole charge on the compounds will be zero.
Now we name all compound one by one
_________________
a) iron(III) carbonate
Symbol for element with valency in Compound
iron(III) = Fe³⁺
Carbonate = (CO₃)²⁻
Now write in combined form
Fe₂(CO₃)₃
Charges add up
iron(III) = Fe³⁺ = (3+) x 2= 6+
Carbonate = (CO₃)²⁻ = (2-) x 3= 6-
So as a whole the charge is zero
_______________
c) ammonium dichromate
Symbol for component with valency in Compound
ammonium = NH₄⁺
dichromate = (Cr₂O₇)²⁻
Now write in combined form
(NH₄)₂Cr₂O₇
Charges add up
ammonium = NH₄⁺ = 2(1+) = 2+
dichromate = (Cr₂O₇)²⁻ = 2-
So as a whole the charge is zero
_______________
e) lithium hydride
Symbol for component with valency in Compound
lithium = Li⁺
hydride = H⁻
Now write in combined form
LiH
Charges add up
Lithium = Li⁺ = 1+
hydride = H⁻ = 1-
So as a whole the charge is zero
_______________
g) calcium acetate
Symbol for component with valency in Compound
calcium = Ca²⁺
Acetate = (C₂H₃O₂)⁻
Now write in combined form
(C₂H₃O₂)₂Ca
Charges add up
calcium = Ca²⁺ = 2+
Acetate = (C₂H₃O₂)⁻ = 2(2-) = 2-
So as a whole the charge is zero
________________
i) lithium chromate
Symbol for component with valency in Compound
Lithium = Li⁺
Chromate = (CrO₄)²⁻
Now write in combined form
(Li)₂CrO₄
Charges add up
Lithium = Li⁺ = 2(1+) = 2+
Chromate = (CrO₄)²⁻ = 2-
So as a whole the charge is zero
_________________
k) lead(II) sulfate
Symbol for component with valency in Compound
lead(II) = Pb²⁺
sulfate = (SO₄)²⁻
Now write in combined form
PbSO₄
Charges add up
lead(II) = Pb²⁺ = 2+
sulfate = (SO₄)²⁻ = 2-
So as a whole the charge is zero
_________________
m) zinc bromide
Symbol for component with valency in Compound
Zinc = Zn²⁺
bromide = Br⁻
Now write in combined form
ZnBr₂
Charges add up
Zinc = Zn²⁺ = 2+
bromide = Br⁻ = 2(1-)
So as a whole the charge is zero
_________________
o) silver iodide
Symbol for component with valency in Compound
Silver = Ag⁺
Iodide = I⁻
Now write in combined form
AgI
Charges add up
Silver = Ag⁺ = 1+
Iodide = I⁻ = 1-
So as a whole the charge is zero
_________________
q) chromium(III) chlorate
Symbol for component with valency in Compound
chromium(III) = Cr³⁺
Chlorate = (CIO)⁻
Now write in combined form
Cr(CIO)₃
Charges add up
chromium(III) = Cr³⁺ = 3+
Chlorate = (CIO)⁻ = 3(1-)
So as a whole the charge is zero
_________________
s) cesium nitride
Symbol for component with valency in Compound
cesium = Cs⁺
Niride = N³⁻
Now write in combined form
Cs₃N
Charges add up
cesium = Cs⁺ = 3(1+)
Niride = N³⁻ = 3-
So as a whole the charge is zero
_________________
u) sodium bicarbonate
Symbol for component with valency in Compound
sodium = Na⁺
bicarbonate = (HCO₃)⁻
Now write in combined form
NaHCO₃
Charges add up
sodium = Na⁺ = 1+
bicarbonate = (HCO₃)⁻ = 1-
So as a whole the charge is zero
_________________
w) beryllium sulfite
Symbol for component with valency in Compound
beryllium =Be²⁺
sulfite = (SO₃)²⁻
Now write in combined form
BeSO₃
Charges add up
beryllium =Be²⁺ = 2+
sulfite = (SO₃)²⁻ = 2-
So as a whole the charge is zero
_________________
y) dinitrogen monoxide
Symbol for component with valency in Compound
Dinitrogen = N₂⁺
oxide = O²⁻
Now write in combined form
N₂O
Charges add up
Dinitrogen = N₂⁺ = 1+
oxide = O²⁻ = 2-
So as a whole the charge is zero
_________________
b) aluminum oxide
Symbol for component with valency in Compound
aluminum = Al³⁺
oxide = O²⁻
Now write in combined form
Al₂O₃
Charges add up
aluminum = Al³⁺ = 2(3+) = 6+
oxide = O²⁻ = 3(2-) = 6-
So as a whole the charge is zero
_________________
d) strontium chloride
Symbol for component with valency in Compound
strontium = Sr²⁺
chloride = Cl⁻
Now write in combined form
SrCl₂
Charges add up
strontium = Sr²⁺ = 2+
chloride = Cl⁻= 2(1-) = 2-
So as a whole the charge is zero
_________________
f) aluminum hydroxide
Symbol for component with valency in Compound
aluminum = Al³⁺
hydroxide = (OH)⁻
Now write in combined form
Al(OH)₃
Charges add up
aluminum = Al³⁺ = 3+
hydroxide = (OH)⁻= 3(1-) = 3-
So as a whole the charge is zero
_________________
h) copper(II) sulfide
Symbol for component with valency in Compound
copper(II) = Cu²⁺
Sulfide = S²⁻
Now write in combined form
CuS
Charges add up
copper(II) = Cu²⁺ = 2+
Sulfide = S²⁻= 2-
So as a whole the charge is zero
_________________
j) nickel(II) chlorate
Symbol for component with valency in Compound
nickel(II) = Ni²⁺
chlorate = (ClO₃)⁻
Now write in combined form
Ni(ClO₃)₂
Charges add up
nickel(II) = Ni²⁺ = 2+
chlorate = (ClO₃)⁻ = 2(1-)
So as a whole the charge is zero
_________________
1) sodium carbonate
Symbol for component with valency in Compound
sodium = Na⁺
chlorate = (CO₃)²⁻
Now write in combined form
Na₂CO₃
Charges add up
sodium = Na⁺ =2(1+) = 2
chlorate = (CO₃)²⁻ = 2-
So as a whole the charge is zero
_________________
Remaining in attachment