For the reaction pcl5(g) + heat pcl3(g) + cl2(g), what will happen when the pressure is increased? there will not be a shift in equilibrium. there will be a shift toward the products. there will be a shift toward the reactants. not enough information is given.

When the pressure is increased, the equilibrium will shift to the left to offset the pressure increase. Equilibrium shifting to the left side is favored because the left side has fewer moles of gas than the number of moles of gas on the right-hand side and because it exerts less pressure. Therefore, the answer is there will be a shift toward the reactants. 

Tolerance to high levels of salinity

You would do 1500/4 and the answer is 375