Chemistry Tutorials and Help
Learning Objectives: To identify physical vs. chemical changes, to identify physical vs. chemical properties, to identify intensive vs. extensive properties Matter-Changes-and-Properties (Notes as a powerpoint file) Matter-Changes-and-Properties (Notes as a PDF for Continue Reading →
Percent yield is a measure of the efficiency of a reaction. The formula used is: The actual yield is the mass of product collected by the chemist in the laboratory Continue Reading →
This page contains some practice problems to help you with limiting reagents. You can click here to print the problems as a worksheet. An answer key is attached at the Continue Reading →
Part 1: 1. 8 mol sodium 2. 0.046 mol lithium chloride 3. a. 27 mole sulfuric acid b. 27 mol hydrogen gas and 9 mol aluminum sulfate 4. a. 11.6 Continue Reading →
Stoichiometry is a very practical area of chemistry concerned with calculating amounts involved in reactions. If you are a chemist performing an experiment in a lab, you need to know Continue Reading →
The following two websites provide excellent notes, explanations, and problem solving videos to help you understand how to solve empirical and molecular formula problems: Empirical and Molecular Formulas Notes and Continue Reading →
Write formulas for the following mixed compounds: 1.) Phosphorous pentachloride 2.) Aluminum nitrite 3.) Nitrous acid 4.) Tin (II) sulfate 5.) Tin (IV) sulfate 6.) Trisulfur hexoxide 7.) Carbonic acid Continue Reading →
Set # 1: First, classify each compound as ionic, covalent (molecular), or acid. Then, name the compounds. BaCrO4 HF N2O4 CCl4 CuO HClO4 Na2O CoCl2 Ca(OH)2 SiO2 Mixed Compounds #1 Continue Reading →
Naming Compounds: 1. If the acid is binary (just 2 elements) write: Hydro – nonmetal stem – ic acid 2. If the acid contains a polyatomic ion, change the ending Continue Reading →
Writing Formulas: 1. Write H as first part of the formula 2. Identify the second part by whether it has hydro- in the name or not. Do step 3 or Continue Reading →