Name Date Section # ASSIGNMENT This assignment is due at the beginning of the se
ID: 1034181 • Letter: N
Question
Name Date Section # ASSIGNMENT This assignment is due at the beginning of the second class period The following are ion-combination reactions. In each of the following reactions, predict the products and then balance the equation in molecular form (using formulas, not names). Then write the balanced net-ionic form of each equation. Assume reactants are aqucous solutions unless underlined (in which case they are solid). Show the physical form of all species (e-g, (aq), (s), etc.). Underline any insoluble products formed. (NOTE: All equations are graded on a right or wrong basis.) 1. chromium(III) chloride + silver(I) nitrate 2, hydrobromic acid + calcium hydroxide ? 3. lead(II) nitrate + potassium sulfate ? 4. coppell)carbonate + nítric acid ?
Explanation / Answer
1.
Molecular form
CrCl3(aq) + 3AgNO3(aq) ---> 3AgCl(s) + Cr(NO3)3(aq)
Ionic equation: Cr3+ + 3Cl- + 3Ag+ + 3NO3- ------> 3AgCl + Cr3+ + NO33-
Cancelling common ions on both sides, we get
3Cl- + 3Ag+ ------> 3AgCl
Net ionic:
Ag+(aq) + Cl-(aq) ---> AgCl(s)
2.
Molecular formula:
2HBr (aq) + Ca(OH)2 (aq) ------> CaBr2 (aq) + 2H2O (l)
Ionic formula:
2H+ + 2Br- + Ca2+ + 2OH- -------> Ca2+ + 2Br- + 2H2O
Cancelling common ions on both sides, we get net ionic equation.
2H+(aq)+ 2OH- (aq)-------> 2H2O (l)
3.
Molecular formula
Pb(NO3)2 (aq) + Na2SO4 (aq) ------> PbSO4 (s) + 2NaNO3 (aq)
ionic formula:
Pb2+ + 2NO3- + 2Na+ + SO42- -------> PbSO4 + 2Na+ + NO3-
cancelling all common ions, we get net ionic equation.
Pb2+(aq)+ SO42- (aq)-------> PbSO4 (s)
4.
Molecular formula
CuCO3(s)+2HNO3(aq)?Cu(NO3)2(aq)+H2O(l)+CO2(g)
Ionic formula:
CuCO3(s) + 2H+(aq) + NO32-(aq) --> Cu2+(aq) + NO32-(aq) + H2O(l) + CO2(g)
Cancelling the common ions on both sides,
CuCO3(s) + 2H+(aq) --> Cu2+(aq) + H2O(l) + CO2(g)
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