Determine which of the following pairs of reactants will result in a spontaneous reaction at 25°c. determine which of the following pairs of reactants will result in a spontaneous reaction at 25°c. na+(aq) + al(s) ag+(aq) + br−(aq) pb2+(aq) + au(s) fe3+(aq) +al(s) none of the above pairs will react.

Cr(oh)3 -> cr(3+) + 3oh-

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na

The formula is (nh4)2co3

13) a 14) a15) b16) i don't know sorry17) a (maybe)