Using LeChatelier explain why the addition of HCl to the NH3 (aq) + H2O (l)   NH4+ (aq) + OH– (aq) equilibrium had an effect on the equilibrium even though HCl is not written as part of the equilibrium reaction. 

In the LeChateliers lab, what did we observe when 1 M HCl was added to the following equilibrium NaCl(s)  Na+(aq)   +  Cl– (aq), what did we see in the laboratory?

If pressure is increased for the reaction N2 (g)+ 3H2(g) 2NH3(g), Le Chatelier predicts that the reaction will shift to the?

The liquid with lowest vapor pressure in the vapor pressure experiment.

Digestion is when the crystals are broken down into smaller crystals to aid in drying.

A student has a single liquid sample that contains 3 polar components.  They want to use chromatography to separate the three components in the sample.   If the solvent used were too nonpolar for the experiment, would you expect to see three spots? Where would the spots be on the chromatogram?  Explain your answers.

a. Calculate the Rf value for each spot on the TLC plates below. Make sure you label which Rf belongs to which compound. Which compound corresponds to the unknown?                                         b. Which compound corresponds to the unknown? Explain your answer.  

What is the name of the process where the student added a little more of the precipitating solution and watched for any new solid formation?

Which is the weakest intermolecular force?

What was the color of the precipitate in the % chloride experiment RIGHT after the precipitating solution was added.