A)Write a net ionic equation for the reaction that occurs when sodium sulfite (a
ID: 594653 • Letter: A
Question
A)Write a net ionic equation for the reaction that occurs when sodium sulfite (aq) and excess nitric acid (aq) are combined. Note: Sulfites follow the same solubility trends as sulfates.B)Write a net ionic equation for the reaction that occurs when iron(II) sulfide (s) and excess hydriodic acid (aq) are combined.
Explanation / Answer
a Na2S(aq) + 2HCl(aq) ------------> 2NaCl(aq) + H2S(g) Then, write out the TOTAL IONIC EQUATION Do this by seperating anything in aqueous solution into its constituant ions... 2Na+(aq) + S2-(aq) + 2H+(aq) + 2Cl-(aq) -----> 2Na+(aq) + 2Cl-(aq) + H2S(g) Now, you can see that 2Na+(aq) and 2Cl-(aq) occur on both sides of the equation unchanged, they are called spectator ions and do not participate in the reaction. Spectator ions are left out of the NET IONIC EQUATION 2H+(aq) + S2-(aq) ----------> H2S(g) molecular BaCl2(aq) + Na2SO4(aq) -------> BaSO4(s) + 2NaCl(aq) Total ionic Ba2+(aq) + 2Cl-(aq) + 2Na+(aq) + SO4(2-)(aq) ---> BaSO4(s) + 2Na+(aq) + 2Cl-(aq) Net ionic Ba2+(aq) + SO4(2-)(aq) --------> BaSO4(s) b Hydrosulfuric acid " ; normally it is called as Hydrogen sulfide Gas Hydrosulfuric acid ; is H2S ; a weak acid that is slightly soluble in water without significant ionization / dissociation 2 [ OH- ] (aq) + H2S (aq) ----> 2 H2O + [ S-- ] (aq) Hydrofluoric acid ; is HF ; a weak acid ; very soluble in water ; the acid is partially ionized in water So , either [ H+ ] (aq) + [ OH- ] (aq) ----> H2O or HF (aq) + [ OH- ] (aq) ----> H2O + [ F- ] Hydroiodic acid ; is HI ; a very strong acid ; very soluble in water ; the acid is completely ionized in water [ H+ ] (aq) + [ OH- ] (aq) ----> H2O Weight Percentage of M in M2O = 67.857 Atomic Weight of M = 16.8888