Consider the following equilibrium system:                  …

Consider the following equilibrium system:                                                                CaCO3(s)  ⇄ CaO(s) +  CO2(g)             Which one of the following changes would cause the above system to shift leftwards (towards reactant)?

A solution contains equal concentrations of Hg2+(aq), Pb2+(a…

A solution contains equal concentrations of Hg2+(aq), Pb2+(aq) and Fe2+(aq) ions. When a solution of   S2-(aq) is slowly added to this solution, the precipitate which forms first is:  Use: HgS      Ksp = 1.6×10-54           PbS       Ksp = 7.0×10-29             FeSKsp = 3.7×10-19

A titration was carried out to find the concentration of an…

A titration was carried out to find the concentration of an unknown base (NaOH) with a known concentration of HCl. Concentration of HCl =0.35 M Volume of HCl dispensed from the buret = 24.35 mL Volume of NaOH added into the beaker = 36.44 mL Calculate the number of moles of NaOH in 36.44 mL