Friday, April 15th: “A” Day Agenda

Section 14.3 QuizCheck lab write-upsLab discussionConduct lab: “Solubility Product Constant”Lab will be due next class period

Section 14.3 Quiz“Equilibrium Systems and Stress”

You may use your notes and your book to complete this quiz on your own….

Lab DiscussionIn this lab, you will:

Prepare a saturated solution of NaCl.Calculate the molarity of each ion in the

solution.Write an equilibrium expression and

calculate the Ksp of NaCl. (?)Demonstrate the effect of the addition of a

common ion to the saturated NaCl solution.Calculate the mass of NaCl necessary to fill

the vat with 4,000 L of saturated solution.

Safety GuidelinesAs always, safety glasses and lab apron are

required.You will be using bunsen burners, so long hair

must be tied back.Do not heat broken or chipped glassware and

handle hot glassware carefully!Be careful heating the evaporating dish so that

the NaCl does not spatter out. You may want to use a watch glass to cover the dish (make sure you get the mass of the watch glass too).

Safety Guidelines

Make sure the evaporating dish is cool before putting it on the balance, it may damage the balance.

All solutions can be safely washed down the drain with plenty of water.

Be careful and have fun!