Mole Calculations Review

Common Core Connection Objectives Today I will be able to: Use Avogadro’s number to convert from grams to moles to particles Calculate the volume of a solution using molar conversions. Informal assessment – monitoring student interactions and questions as they complete the mole review practice Formal assessment – analyzing student responses to the practice and exit ticket Common Core Connection Build Strong Content Knowledge Reason abstractly and quantitatively Make sense of problems and persevere in solving them

Lesson Sequence Evaluate: Warm-Up Explain: Mole Review Elaborate: Mole Conversion Practice Problems Evaluate: Exit Ticket

Warm-Up 1. Predict, translate, and balance the following equation: Iron (III) Bromide + Ammonium Sulfide  2. Write out the complete ionic equation for the above reaction

Objectives Today I will be able to: Use Avogadro’s number to convert from grams to moles to particles. Calculate the volume of a solution using molar conversions.

Homework Complete the Mole Conversion Practice

Mole Review We will review some mole concepts and practice problems together as a class before we try a problem set

Review Questions What is Avogadro’s number? 6.02 x 1023 What are the 3 types of particles? Atoms, molecules and formula units When is matter referred to as an atom? When it is a pure element When is a compound referred to as a formula unit? If the compound is ionic When is a compound referred to as a molecule? When it is covalent

Review Questions Continued What conversion factor is used to convert from mass to moles? Molar Mass What conversion factor is used to convert from moles to particles? Avogadro’s number

Converting from moles to Liters Use the conversion factor 22.4 L = 1 mole Example: What volume does 2.5 moles of O2 gas occupy?

Practice Problem 1 How many moles of AgNO3 are in 3.47 g of AgNO3? I DO

Practice Problem 2 How many molecules of H2O are in 1.27 moles of H2O? We DO

Practice Problem 3 How many formula units of NaCl are in 23.99 g of NaCl? You DO

Mole Conversion Practice Complete the practice problems at your desk. Selected responses will be reviewed as a class. Problems not completed in class will be completed at home.

Exit ticket Determine the type of representative particle: Br2 CaSO4 (Hint: atom, formula unit, molecule) Br2 CaSO4 NH4Cl Hg P2O5 Al2O3