The purpose of this lab was to mix different chemicals and see what changes their were in unknown liquids based on what they were, we were also meant to figure out what these 4 liquids were (bases, acids, neutrals). We were given 4 unknown liquids and we could choose 4-6 given chemicals, using those chemicals we could figure out which each category each of the liquids fit into. The chemicals we chose were, blue litmus paper, methyl orange, indigo carmine, phenolphthalein indicator, bromothymol blue indicator, when these were mixed with all of the unknowns they either stayed the same or changed based on what the unknowns were, we used a chart to figure this out, 
based on what the chart said is how we figure out what unknown liquid was in what category.
The competency demonstrated and practiced during this lab was critical thinking and communication, with critical thinking we need to think and pick apart what we were doing with unknowns to figure out what unknown fits in what category, with the communications me and my partner needed to communicate about what we thought for each of the unknowns.