Which research question is demonstrated by this experiment? A. What physical process creates new soil?
B. What chemical process creates a reaction?
C. What internal force drives tectonic motion?
D. What external force causes a river to flood?

Adialysis unit requires 78.5 l of water.the estimated digit is 5. 

Answer is: the equilibrium  shifts toward the reactants, to the left side of chemical reaction.it is because lead(ii) nitrate dissociates in water: pb(no₃)₂ → pb²⁺(aq) + 2no₃⁻(aq).according to lechatelier's principle, the position of equilibrium moves to counteract thechange (more lead cations, common ion), the position of equilibrium will move so that the concentration ofproducts decrease and concentration of reactants of chemical reaction increase.read more on -

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Tell me the answer choices and i would be able to answer. : )