Journal Entry:

What is the formula weight and percent composition of Sodium Sulfate?

Learning Intentions

• You will learn how to determine formula weight of compounds and then determine percent mass composition for each element in the compound.

• You will learn how to use empirical formula and percent mass composition to determine if substance is pure.

• You will learn what a hydrate is 

Closing Task:

You can plan an experiment using formula mass and percent composition of a hydrate to analyze data and evaluate if a container of a particular hydrate is pure or has been contaminated and is now a mixture.

Content Standards being covered:

LO 1.2 Students can select and apply mathematical routines to mass data to identify or infer the composition or pure substances and/or mixtures.  

LO 1.3 Students can select and apply mathematical relationships to mass data in order to justify a claim regarding the identify and/or estimated purity of a substance.  

SP 2.2 Students can apply mathematical routines to quantities that describe natural phenomena.    

SP 4.2 Student can design a plan for collecting data to answer a particular scientific question.