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Common Ions and Formulae Flashcards

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1
Q

What is the formula for aluminium?

A

Al3+

Aluminium is a chemical element with the symbol Al.

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2
Q

What is the formula for ammonium?

A

NH4+

Ammonium is a positively charged polyatomic ion.

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3
Q

What is the formula for barium?

A

Ba2+

Barium is an alkaline earth metal.

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4
Q

What is the formula for bromide?

A

Br-

Bromide is a negatively charged ion of bromine.

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5
Q

What is the formula for caesium?

A

Cs+

Caesium is an alkali metal.

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6
Q

What is the formula for calcium?

A

Ca2+

Calcium is an essential element for living organisms.

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7
Q

What is the formula for carbonate?

A

CO3^2-

Carbonate is a polyatomic ion with a charge of -2.

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8
Q

What is the formula for chloride?

A

Cl-

Chloride is the anion of chlorine.

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9
Q

What is the formula for chromate?

A

CrO4^2-

Chromate is a polyatomic ion with a -2 charge.

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10
Q

What is the formula for chromium(III)?

A

Cr3+

Chromium(III) indicates chromium in a +3 oxidation state.

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11
Q

What is the formula for cobalt(II)?

A

Co2+

Cobalt(II) refers to cobalt in a +2 oxidation state.

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12
Q

What is the formula for copper(II)?

A

Cu2+

Copper(II) indicates copper in a +2 oxidation state.

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13
Q

What is the formula for cyanide?

A

CN-

Cyanide is a highly toxic anion.

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14
Q

What is the formula for dichromate?

A

Cr2O7^2-

Dichromate is a polyatomic ion with a -2 charge.

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15
Q

What is the formula for dihydrogen phosphate?

A

H2PO4^1-

Dihydrogen phosphate is a weak acid and a source of phosphate.

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16
Q

What is the formula for ethanoate (acetate)?

A

CH3OO-

Ethanoate is commonly known as acetate.

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17
Q

What is the formula for fluoride?

A

F-

Fluoride is the anion of fluorine.

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18
Q

What is the formula for hydrogen?

A

H+

Hydrogen ion is a proton.

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19
Q

What is the formula for hydrogencarbonate?

A

HCO3^1-

Hydrogencarbonate is also known as bicarbonate.

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20
Q

What is the formula for hydrogenphosphate?

A

HPO4^2-

Hydrogenphosphate is a polyatomic ion with a -2 charge.

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21
Q

What is the formula for hydrogensulfate?

A

HSO4^1-

Hydrogensulfate is a bisulfate ion.

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22
Q

What is the formula for hydroxide?

A

OH-

Hydroxide is a negatively charged ion consisting of oxygen and hydrogen.

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23
Q

What is the formula for iodide?

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A

I-

Iodide is the anion of iodine.

24
Q

What is the formula for iron(II)?

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A

Fe2+

Iron(II) indicates iron in a +2 oxidation state.

25
What is the formula for iron(III)?
Fe3+ ## Footnote Iron(III) refers to iron in a +3 oxidation state.
26
What is the formula for lead(II)?
Pb2+ ## Footnote Lead(II) indicates lead in a +2 oxidation state.
27
What is the formula for lithium?
Li+ ## Footnote Lithium is an alkali metal.
28
What is the formula for magnesium?
Mg2+ ## Footnote Magnesium is an essential element for biological functions.
29
What is the formula for manganese(II)?
Mn2+ ## Footnote Manganese(II) refers to manganese in a +2 oxidation state.
30
What is the formula for nickel(II)?
Ni2+ ## Footnote Nickel(II) indicates nickel in a +2 oxidation state.
31
What is the formula for nitrate?
NO3^1- ## Footnote Nitrate is a polyatomic ion with a -1 charge.
32
What is the formula for nitride?
N3- ## Footnote Nitride is a negatively charged ion of nitrogen.
33
What is the formula for nitrite ion?
NO2^1- ## Footnote Nitrite ion is a polyatomic ion with a -1 charge.
34
What is the formula for oxalate?
C2O4^2- ## Footnote Oxalate is a -2 charged ion derived from oxalic acid.
35
What is the formula for oxide?
O2- ## Footnote Oxide is a negatively charged ion of oxygen.
36
What is the formula for permanganate?
MnO4^1- ## Footnote Permanganate is a strong oxidizing agent.
37
What is the formula for phosphate?
PO4^3- ## Footnote Phosphate is a polyatomic ion with a -3 charge.
38
What is the formula for potassium?
K+ ## Footnote Potassium is an alkali metal.
39
What is the formula for rubidium?
Rb+ ## Footnote Rubidium is an alkali metal.
40
What is the formula for silver?
Ag+ ## Footnote Silver is a transition metal.
41
What is the formula for sodium?
Na+ ## Footnote Sodium is an alkali metal.
42
What is the formula for strontium?
Sr2+ ## Footnote Strontium is an alkaline earth metal.
43
What is the formula for sulfate?
SO4^2- ## Footnote Sulfate is a polyatomic ion with a -2 charge.
44
What is the formula for sulfide?
S2- ## Footnote Sulfide is a negatively charged ion of sulfur.
45
What is the formula for sulfite?
SO3^2- ## Footnote Sulfite is a polyatomic ion with a -2 charge.
46
What is the formula for zinc?
Zn2+ ## Footnote Zinc is a transition metal.
47
What is the formula for ammonia?
NH3 ## Footnote Ammonia is a compound of nitrogen and hydrogen.
48
What is the formula for water?
H2O ## Footnote Water is essential for all known forms of life.
49
What is the formula for hydrogen peroxide?
H2O2 ## Footnote Hydrogen peroxide is used as a disinfectant.
50
What is the formula for ethanoic acid (Acetic acid)?
CH3COOH ## Footnote Ethanoic acid is commonly known as vinegar.
51
What is the formula for hydrochloric acid?
HCl ## Footnote Hydrochloric acid is a strong acid used in various industrial processes.
52
What is the formula for nitric acid?
HNO3 ## Footnote Nitric acid is a powerful oxidizing agent.
53
What is the formula for carbonic acid?
H2CO3 ## Footnote Carbonic acid is formed in solution when carbon dioxide is dissolved in water.
54
What is the formula for sulfuric acid?
H2SO4 ## Footnote Sulfuric acid is a highly corrosive strong acid.
55
What is the formula for sulfurous acid?
H2SO3 ## Footnote Sulfurous acid is a weak acid derived from sulfur dioxide.
56
What is the formula for phosphoric acid?
H3PO4 ## Footnote Phosphoric acid is used in fertilizers and food flavoring.

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