MLO3-1 Predict from the elements present in a compound whether it contains ionic or covalent bonds.
MLO3-2 Apply the rules of nomenclature to write formulas or to name ionic compounds, molecular compounds and acids
MLO3-3 Identify polyatomic ions, their formula and charge
MLO3-4 Calculate molar mass of a compound and convert between mass and moles
MLO3-5 Calculate the percent composition of a compound or determine the empirical and molecular formula of a compound from percent composition.
The following list contains videos by Tyler DeWitt on identifying chemical compounds
This presentation covers the conversions from mass to moles and how to calculate molar mass to perform calculations in Activity 9
The presentation covers how to calculate the percent by mass of an element in a known compounds or how to determine the empirical and molecular formula of a compound given the percent masses of each element in the compound.
Online Homework with solutions - https://www.csudh.edu/chemistry/course-materials/online-homework/
Empirical Formula and Molecular Formula Introduction - https://youtu.be/wnRaBWvhYKY
Writing Empirical Formula Practice Problems - https://youtu.be/ucU5PD6W3Ik
Calculating Molecular Formula from Empirical Formula - https://youtu.be/J_MtVs0aBdU
Percent Composition By Mass - https://youtu.be/lywmGCfIUIA
Percent Composition Common Mistakes - https://youtu.be/lh1endFwo80
https://youtu.be/Qflq48Foh2w
Tyler DeWitt - We will learn how to calculate the molar mass of a compound by using its chemical formula. Molar mass is a quantity that is very similar to molecular mass, molecular weight, formula mass, and formula weight. In order to calculate molar mass, we look at the formula to determine how many atoms of each type are in it, and then look at the periodic table to determine the atomic mass of each of the atoms. We will look at compounds containing polyatomic ions, and also hydrate compounds.
https://youtu.be/lywmGCfIUIA
Tyler DeWitt - We'll learn how to calculate percent composition by mass, and we'll work through a number of practice problems. To calculate percent by mass, you need to determine two things: the mass of just the element, and the molar mass of the whole compound. Then, you take the molar mass of just the element and divide it by the molar mass of the whole compound, and multiply by 100%.
This presentation covers % mass through the determination of mass percent of water in a hydrated salt and % copper in an unknown using Experiment 6.