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Eqn Basics

Fundamental formulas and rules needed in equation writing

QuestionAnswer
Ammonia NH3
Ammonium ion NH4 superscript +
Hydrogencarbonate ion HCO3 superscript -
Hydroxide ion OH superscript -
Nitrate ion NO3 superscript -
Carbonate ion CO3 superscript 2-
Sulfate ion SO4 superscript 2-
Phosphate ion PO4 superscript 3-
Hydride ion and Hydrogen ion H- and H+
Chloride ion Cl-
Bromide ion Br-
Iodide ion I-
Oxide ion O superscript 2-
Sulfide S superscript 2-
Nitride N superscript 3-
Copper (I) ion Cu+
Copper (II) ion Cu superscript 2+
Silver ion Ag+
Gold(I) ion Au+
Platinum(I) ion Pt+
Iron(I) ion Fe+
Iron (II) ion Fe superscript 2+
Iron (III) ion Fe superscript 3+
Aluminium ion Al superscript 3+
Zinc ion Zn superscript 2+
Lead (II) ion Pb superscript 2+
Magnesium ion Mg superscript 2+
Sodium ion Na+
Potassium ion K+
Magnesium fluoride MgF2
Lithium chloride LiCl
Calcium chloride CaCl2
Copper(I) iodide CuI
Potassium bromide KBr
Iron(II) oxide FeO
Aluminium sulphide Al2S3
Sodium chloride NaCl
Barium chloride BaCl2
Iron(III) sulphate Fe2(SO4)3
Sodium hydroxide NaOH
Ammonium bromide NH4Br
Potassium sulphate K2SO4
Magnesium sulphate MgSO4
CaF2 Calcium fluoride
KBr Potassium bromide
CuCl Copper(I) chloride
CuCl2 Copper(II) chloride
CuO Copper(II) oxide
AlCl3 Aluminium chloride
MgI2 Magnesium iodide
NaBr Sodium bromide
ZnCl2 Zinc chloride
LiF Lithium fluoride
PbO2 Lead(IV) oxide
AgNO3 Silver nitrate
Na2CO3 Sodium carbonate
(NH4)2SO4 Ammonium sulphate
KNO3 Potassium nitrate
Name the transition metals commonly written with roman numerals in bracket to indicate their valency since they can have multiple valencies. Copper, iron, lead ...
Name the prefixes 1 to 10 used in naming covalent compounds. mono, di, tri, tetra, penta, hexa, hepta, octa,
Carbon tetrachloride CCl4
Hydrogen chloride HCl
Ammonia NH3
Sulphur trioxide SO3
P4S5 Tetraphosphorus pentasulphide
Si2Br6 Disilicon hexabromide
SCl4 Sulphur tetrachloride
All group 1 compounds are SOLUBLE
All ammonium compounds are SOLUBLE
Most nitrate and ethanoates are SOLUBLE except silver ethanoate which is slightly soluble.
Most chlorides, bromides and iodides are SOLUBLE except those of lead and silver which are moderately soluble in hot water.
Most sulfates are SOLUBLE except those of lead and barium which are insoluble. Calcium sulphate and silver sulfate are slightly soluble.
All hydrogencarbonates are SOLUBLE
Most carbonates and phosphates are INSOLUBLE except those of group 1 metals and ammonium.
Most metal hydroxides are INSOLUBLE except those of group 1 metals and ammonium. Barium, calcium and magnesium hydroxide are slightly soluble.
Most metal oxides are INSOLUBLE except those of group 1 metals. Calcium and barium react with water to form their hydroxides.
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