Chemistry Forum

If K and Al are metals and not ions indeed, what is SO4 then?
Please get the right reaction first.
Two possibilities
1. K+ + Al3+ + 2 SO4- + 12 H2O = KAl(SO4)2*12H2O - no brainer
2. K + Al + 2 H2SO4 + 12 H2O = KAl(SO4)2*12H2O +2H2 - hydrogen released

Determine OH- concentrations first from the equasion:
Ca(OH)2 --> Ca2+ + 2OH-

and then see how it shift equillibrium
H2O <--> H+ + OH-
H+ is represented as H3O+ to confuse you - it's the same

AlBr3 + Mg(OH)2 = Al(OH)3 + MgBr2 - now put appropriate coefficients


NH3 + H2SO4 = - easy. Read your book

Dear moni,
Sorry, but it doesn't make sense. I understand sample paper and even sulfide solition, but "probably it is Siver , lead, copper, zinc, nickle or iron sulfide solution" - neither of these sulfides are soluble in water. Without knowing details of your problem nobody can help you.

Please tell us what Br is. Is it Br2 or Br- (such as NaBr)

Nothing oxidized or reduced, so write it correctly first:
NaOH + H2C2O4*2H2O = H2O + Na2C2O4
Now you do the easy part.

2.225 g of Fe would be 2.225/55.85 = 0.0398 g-a, if 100% pure. It will produce 0.0398 mol of FeSO4 31.0 ml*0.0185 mol/1000 ml = 0.000573 mol K2Cr2O7 6FeSO4 + K2Cr2O7 + 7H2SO4 = 3Fe2(SO4)3 + Cr2(SO4)3 +K2SO4+7H2O So 0.000573 mol K2Cr2O7 should be enough o react with 0.000573 mol *6 = 0.00344 mol We e...

Where did you find HPO3? It's only formally existing acid. HPO3 is H3PO4:
HPO3 + H2O --> H3PO4
An this 3HPO3 + Na3PO4 = H3PO4 + 3NaPO3 is incorrect. There is no way to carry our such reaction, even though it's formally correct

Can this be solved? Li3PO4 + MgSO4 -> Li2SO4 + Mg3PO4

Sure it can, if Mg3PO4 written correctly:
Li3PO4 + MgSO4 -> Li2SO4 + Mg3(PO4)2

2Li3PO4 + 3MgSO4 -> 3Li2SO4 + Mg3(PO4)2

CuSO4 + KI= CuI+ I2+K2SO4 1. Draw the reaction in electron exchange form: Cu2+ +1e- --> Cu+ 2I- - 2e- --> I2(0) 2. Distribute coefficients, so the number of electrons accepted in the first equation is the same as donated in the second equation: Cu2+ +1e- --> Cu+ /2 - total of two electrons 2I- - 2e-...

All carbonates react with acids such as acetic acid with release of carbon dioxide:
CH3COOH + Ca(HCO3)2 --> Ca(CH3COO)2 + CO2
analogously react othe carbonates and bicarbonates.

Bill, Interesting, what is the reason for doing that. Any practical sense or just theoretical question? For example any phosphate mineral will contain water and carbon dioxide in some form. Heating should eliminate water and eventually CO2 from the rock and therefore increase relative content of P2O...

a.) CaO+5HNO3=_Ca(NO3)2______ +H2O
b.) NaHCO3+H2SO4=Na2SO4+H2O+_CO2_____
Now try to balance. It's easy

Zink would react with NH4Cl giving ammonia, ZnCl2 and hydrogen. Surface of zink dust is covered with ZnO and prevents it from reacting with nitrite. In any case, NH4Cl works as a surface cleaner. Obviously, hydrogen is not getting releazed when nitrite present. Instead frsh surface of zink getting i...

Count electorns the way you would count money. Look which atom is giving and which is taking. Total amount of money (electrons) must be the same when changing pockets.