Please show your work. First one to complete ALL of these questions correctly so
ID: 792320 • Letter: P
Question
Please show your work. First one to complete ALL of these questions correctly so that I can understand your thought process throughout the equations gets 900 pts.
3. What two aqueous reactants might you combine to give barium sulfate precipitate? Write the molecular equation for the reaction that would result.
4. What two aqueous reactants might you combine to give a lead(II) sulfide precipitate? Write the molecular equation for the reaction that would result.
5. Predict the products (if any) of the following reactions and write the molecular, complete ionic and net ionic equations for each.
A) aqueous sodium sulfide + hydrobromic acid
B) solid iron + hydroiodic acid
Explanation / Answer
3) BaCl2(aq) + Na2SO4(aq) ---> BaSO4(s) + 2NaCl(aq.)
4)Pb(NO3)2(aq) + Na2S(aq) --> PbS(s) + 2NaNO3(aq)
5)A) 2HBr + Na2S(aq) --> H2S(gas) + 2NaBr(aq)
2Na+(aq) + 2H+(aq) + 2Br-(aq) + S2-(aq) --> H2S(g) + 2Na+(aq) + 2Br-(aq)
Net ionic eqn. : 2H+(aq) + S2-(aq) ---> H2S(g)
No solid formed in the reaction.
5B) 2Fe(s) + 6HI(aq) --> 2FeI2(s) + 3H2(g) + I2(g)
Complete ionic eqn :
2Fe(s) + 6H+(aq) + 6I-(aq) ---> 2FeI2(s) + 3H2(g) + I2(g)
Net ionic eqn.:
2Fe(s)+ 6H+(aq) +6I-(aq) ---> 3H2(g) + 2Fe3+(aq) + 6I-(aq)
2Fe3+ (aq) + 2I-(aq) -->2Fe(2+)(aq) +I2(g)
2Fe2+(aq) + 4I-(aq) --> 2FeI2(s)