Write the balanced chemical equation (excluding spectator ions)?

Question

1) Dilute hydrochloric acid is added to a solution of potassium sulfite
2) A solution of sulfuric acid is added to a solution of barium hydroxide until the same number of moles of each compound has been added.
3) A mixture of solid calcium oxide and solid tetraphosphorus decaoxide is heated.
4) Sulfur dioxide gas is passed over solid calcium oxide
5) Solid zinc sulfide is heated in an excess of oxygen.
6) A solution of potassium iodide is added to an acidified solution of potassium dichromate.

Answer 1

It is obnoxious to just post all of your HW questions here for someone to answer .

The concept is as follows:

In a double replacement reaction two compounds are reacted and "switch partners". If one of the new products is a solid or a gas, it leaves the reaction and is no longer ionized. The other ions are still in solution and called spectator ions.

Answer 2

1) BaO + H2O = Ba(OH)2 already balanced 2) CaO + CO2 = CaCO3 already balanced 3) N2O5 + H2O = 2HNO3 already balanced or N2O5 + H2O = 2H+ + 2NO3(-) 4) CS2 + 3O2 = CO2 +2SO2 already balanced 5) Ag(NH3)2Cl + 3HNO3 = AgNO3 +2NH4NO3 + HCl already balanced or Ag(NH3)2Cl + HNO3 = Ag(NH3)2NO3 + HCl 6) 4NH3 + Zn(OH)2 = Zn(NH3)4(2+) + 2OH- 7) Al(OH)3 + NaOH = NaAl(OH)4 Al(OH)3 + OH- = Al(OH)4(-) 8) (NH4)2CO3 = 2NH3 + H2O + CO2 already balanced 9) Cu2+ + 2e= Cu(0) Get the point. Dr Chris gave you balanced equations. What a nice guy