Do: Part 3 for Lab 20G – find the molar mass of a weak monoprotic acid.
Do: Part 4 for Lab 20G – find the Ka of a weak monoprotic acid (HX). You measured the pH of the acid (which is the equilibrium concentration of H+). From the titration, you will find the initial molarity of the acid. By knowing these two pieces of information, calculate the Ka of the acid.
For extra help, you can get help from the TNT tutors.
Do: Solubility worksheet – this is a really good review of the different types of questions you will find on your test next class. See copy here: Solubility Problems and Answer Key Only look at the answer key AFTER you have tried the question!
Ksp Test on Thurs Feb 1. Here is an outline: the test will cover all the sections after our last test, focusing on Ksp calculations. You can expect to have at least one of each of the four types of problems we went over in the study guide, along with question about the common ion effect and titrations. The test will be all written. You will need a pencil and scientific calculator.
If you have questions, work with the tutors in the TNT Club after school in Rm111 or 112 today (they’re great!) or with the SUCCESS tutors (Rm32).
For Wed: bring materials you want to use to prep for your sci fair presentation on Friday. You can bring your display boards, paper, notes, etc…You can practice your oral presentation with other students. I will supply scissors and glue sticks.
Friday: I will arrive around 8:15am so you can bring your projects in to set up (block 1) or put on the counter (block 2). Bring your display board and visuals, your written report, your journal, and your oral presentation.
Test outline: Major topics: properties of solutions, molarity calculations, precipitate formation (memorize the solubility table!), types of reactions (ie. redox, metathesis). Format: about 20 mc questions and written section will include calculations and writing equations.