A student examines a particulate diagram illustrating a reaction between two aqueous…

CHEMISTRY · Single correct · AP · Chemistry · Chemical Reactions · Chemical Reactions

Problem

A student examines a particulate diagram illustrating a reaction between two aqueous solutions. In the initial panel, one container shows blue spheres labeled 2+2+ (Ba2+^{2+}) dispersed with red tetrahedra (NO3−_3^-), while a second container shows yellow tetrahedra (SO42−_4^{2-}) mixed with black spheres labeled ++ (K+^+). In the final panel, the blue spheres and yellow tetrahedra form an extended lattice that has settled to the bottom, and only the black spheres and red tetrahedra remain freely moving in solution. Which of the following net ionic equations most consistently represents the chemical change illustrated? (a) Ba2+(aq)+2 NO3−(aq)→Ba(NO3)2(s)Ba^{2+}(aq) + 2\,NO_3^{-}(aq) \rightarrow Ba(NO_3)_2(s) (b) Ba2+(aq)+SO42−(aq)→BaSO4(aq)Ba^{2+}(aq) + SO_4^{2-}(aq) \rightarrow BaSO_4(aq) (c) Ba2+(aq)+SO42−(aq)→BaSO4(s)Ba^{2+}(aq) + SO_4^{2-}(aq) \rightarrow BaSO_4(s) (d) Ba(NO3)2(aq)+K2SO4(aq)→BaSO4(s)+2 KNO3(aq)Ba(NO_3)_2(aq) + K_2SO_4(aq) \rightarrow BaSO_4(s) + 2\,KNO_3(aq)

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