Common Ions and Acids

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1

ammonium

NH4 +

2

copper(I)

Cu +

3

copper(II)

Cu 2+

4

iron(II)

Fe 2+

5

iron(III)

Fe 3+

6

lead(II)

Pb 2+

7

lead(IV)

Pb 4+

8

acetate

C2H3O2 -

9

carbonate

CO3 2-

10

hydrogen carbonate

HCO3 -

11

chlorate

ClO3 -

12

hydroxide

OH -

13

nitrate

NO3 -

14

phosphate

PO4 3-

15

sulfate

SO4 2-

16

permanganate

MnO4 -

17

aluminum

Al 3+

18

barium

Ba 2+

19

cadmium

Cd 2+

20

calcium

Ca 2+

21

chromium(III)

Cr 3+

22

cobalt(II)

Co 2+

23

lithium

Li +

24

magnesium

Mg 2+

25

mercury(I)

Hg2 2+

26

mercury(II)

Hg 2+

27

nickel(II)

Ni 2+

28

potassium

K +

29

silver

Ag +

30

sodium

Na +

31

strontium

Sr 2+

32

zinc

Zn 2+

33

bromide

Br -

34

chloride

Cl -

35

hypochlorite

ClO -

36

chlorite

ClO2 -

37

perchlorate

ClO4 -

38

chromate

CrO4 2-

39

cyanide

CN -

40

dichromate

Cr2O7 2-

41

fluoride

F -

42

iodide

I -

43

nitrite

NO2 -

44

oxide

O 2-

45

sulfite

SO3 2-

46

sulfide

S 2-

47

cesium

Cs +

48

beryllium

Be 2+

49

hydrogen sulfate

HSO4 -

50

oxalate

C2O4 2-

51

peroxide

O2 2-

52

tartrate

C4H4O6 2-

53

phosphide

P 3-

54

phosphite

PO3 3-

55

nitride

N 3-

56

hydrogen sulfide

HS -

57

Roman Numerals

elements that can form more than one positive ion; usually seen with metals

58

-ous and -ic

represent the ions with lesser or greater charge

59

-ide

represents the name of a monoatomic ion of an element

60

-ite

represents an element that forms two oxyanions (polyatomic anions which contain oxygen)
the one with less oxygen

61

-ate

represents an element that forms two oxyanions (polyatomic anions which contain oxygen)
the one with more oxygen

62

hypo- and per-

represents a series of four oxyanions; indicate less oxygen and more oxygen: used with -ite and -ate

63

bi- and di- hydrogen

Polyatomic anions sometimes gain one or more H+ ions to form anions of a lower charge. These ions are named by adding the word hydrogen or dihydrogen in front of the name of the anion. It is still common to see and use the older naming convention in which the prefix bi- is used to indicate the addition of a single hydrogen ion.

64

hydrofluoric acid

HF

65

hydrochloric acid

HCl

66

hydrobromic acid

HBr

67

hydroiodic acid

HI

68

phosphoric acid

H3PO4

69

nitrous acid

HNO2

70

nitric acid

HNO3

71

sulfurous acid

H2SO3

72

sulfurous acid

H2SO4

73

acetic acid

HC2H3O2

74

hypochlorous acid

HClO

75

chlorous acid

HClO2

76

chloric acid

HClO3

77

perchloric acid

HClO4

78

carbonic acid

H2CO3