Honors Chemistry students at Polk County High School recently conducted a lab that tested the students’ lab skills for both accuracy and precision. The lab was the summative activity to acid and bases.
The students had to titrate an unknown concentration of base solution with a known amount of potassium hydrogen phthalate (solid acid) via an endpoint with the color indicator, phenolphthalein. The students then used their data collected and stoichiometry skills to determine the concentration of the base solution.
Students learned a new lab skill and applied their existing knowledge to solve the question posed.
“Students need developed lab skills as well as a knowledge base to make it in college science classes,” said PCHS chemistry teacher Leslie Rhinehart. “I want my students to be prepared for college science classes and not have to change their major, their dream.”