What is SO3 and what is SO4? What's the difference? (In ions...not Sulfur trioxide etc...)?
963048
SO3^2- has sulphur with an oxidation number of +4 whereas SO4^2- has sulphur with an oxidation number of +6. SO4^2- is more common and stable.
571388
Cu + 2H2S04 --> CuSO4 + SO2 + 2H20\n\nCu (copper) is oxidized, because it loses 2 electrons to enter into the +2 state.\n\nThe sulfuric acid is the oxidizing agent, because it oxidizes the copper and is itself reduced to form sulfur dioxide. (Compare the oxidation states. Half of it remains as SO4- because it takes 2 equivalents of H2SO4 to react with Cu, due to the mole to mole ratio.)\n\nI'd do this reaction in the fume hood, though. SO2 is an irritant to your lungs.
216402
It's:\n\nBaSO4(s)---water <--> Ba2+(aq)  +  SO4 2-(aq)\n\nthe solubility for this compound is very low  per  g/L\n\n\n about 0.0023g/L
777672
S2O3(2-)-->SO4(2-)          balance S first\nS2O3(2-)-->2SO4(2-)         balance O with water\n5H2O+S2O3(2-)-->2SO4(2-)        balance H with H+\n5H2O+S2O3(2-)-->10H++2SO4(2-)       balance charge with e-\n\n5H2O+S2O3(2-)-->10H++2SO4(2-)\n                                        +8e-\nthe 8e- is with the product side
725443
d) basic\n\n[Non-metal oxides do the opposite and form acidic solutions if they are soluble e.g. sulphur dioxide dissolves to form sulphurous acid)
531937
-ous has fewer oxygen than -ic.\ne.g. H2SO3 (sulphurous acid) and H2SO4 (sulphuric acid).\n\ni. -ates : salt with more oxygen; e.g. (SO4)2-\nii. -ites : salt with fewer oxygen, old naming system, e.g.(SO3)2-\nNowadays, they are named as sulphate (VI) and sulphate (IV) after the oxidation state of sulphur.\n\niii. -ides :  made of only 2 elements; e.g. FeS iron sulphide\n\niv. -ines : for Group 7 elements, e.g. fluorine, chlorine, bromine...\n\nv. -ones : outside of organic chem, I can't seem to recall this; e.g. ketones.\n\nvi. etc : Never seen this before. Hee! Hee! :D
828232
As I've answered elsewhere, the solubility of the Group 2 sulphates decreases as you go down the group. MgSO4 is reasonably soluble, therefore, but BaSO4 is pretty insoluble.
1084692
ionic: electrons are transfered.... i.e. NaCl, MgO\ncovalent: electrons are shared.... i.e. water, sulfur dioxide
311033
H2SO4 - H20 = SO3\n\nAnyhydride is the removal of the atoms of water, therefore leaving Sulphur Trioxide.
253717
what the others have answered are the elements consisting of ammonium sulphate and they've still got that wrong... it's nitrogen, hydrogen, sulphur and oxygen (no carbon and ammonia is NH3).\n\nChemical properties on following website: http://en.wikipedia.org/wiki/Ammonium_sulphate
30400
Sulfuric Acid- just learned that today... check the link for more info...\nit is a VERY strong acid!
709959
No, the zinc ion has a positive charge because it is transition metal (+2 charge) but the sulfide ion has a negative charge (-2 charge). If you wanted, there could be a compound of Zinc Sulfide, since zinc is a metal and sulfide is a nonmetal.
394775
2Cu(NO3)2 ----> 2CuO + 4NO2 + O2\nOBSERVATION: brown, choking fumes of NO2 evolved; black solid i.e CuO settles at the bottom\n\n2FeSO4 ----> Fe2O3 + SO2 + SO3 \nOBSERVATION: white fumes of SO3 evolved and reddish brown solid i.e. Fe2O3 formed\n\nEDIT: The above equation for iron(II)sulphate may be a supposed characteristic for its thermal decomposition relating to that of copper(II)nitrate above, but Chaos, O2 will not be evolved here, because SO3 will not get reduced to O2, even on strong heating.
744353
CuXO4 can either mean:\n\nCuSO4 - Copper(II) sulfate\n\nor\n\nCuSeO4  - Cooper (II) selenate
986526
Sulfuric acid has a higher dissociation constant than acetic acid.  This means that more of it will dissociate in solution.\nAlso, sulfuric acid has 2 hydrogen atoms  that it can give up to solution vs. 1 from acetic acid.
862596
K2SO4\nCa(NO3)2\n\npotassium has a +1 charge and sulfate has a -2 so therefore you need 2 potassiums so that you can have a net zero charge.\ncalcium has a +2 charge and nitrate has a -1 charge so you need two nitrates to balance the charges
702225
there are 5 ways to prepair MgSo4 \n\n-neutralisation between acid and alkali(but this is espcially for sodium and potassium salt)\n\n-Acid and metal (magnesium and sulphuric acid)\n\n-Acid and metal oxide (magnesium oxide and sulphuric acid)\n\n-Acid and metal hydroxide (magnesium hydroxide and sulphuric acid)\n\n-Acid and metal carbonate (magnesium carbonate and sulphuric acid)\n\nthese methods are especially for soluble salts...