Stoichiometry

Stoichiometry includes conversions between moles, mass, gas volume and particles as well as calculations of these amounts from one substance in a reaction to another, percent yield and limiting reactant calculations. 

example BCA table including data
Rethinking Stoichiometry
// Wednesday, February 3, 2016 • Lauren Stewart
Stoichiometry is arguably one of the most difficult concepts for students to grasp in a general chemistry class. Stoichiometry requires students to synthesize their knowledge of moles, balanced equations and proportional reasoning to describe a process that is too small to see.
stoichiometry resources
Using Video Resources to Address Stoichiometry Misconceptions
// Thursday, December 3, 2015 • Michelle Okroy
Are students reflecting on what their calculated values indicate? This question constantly runs through the minds of chemistry teachers across the country. Recently educators have seen shifts in instruction that promote connections to real-world phenomena using conceptual depth in understanding.
Ignition of sugar and potassium chlorate produces purple flames and sparks.
Stoichiometry Fireworks Lab Quiz
// Monday, November 3, 2014 • David Licata
Given the amount of one reactant, students must use stoichiometry to find the ideal amount of the second reagent to use to create purple fireworks. The teacher ignites each groups' fireworks. Ideal mixture create little or no ash. Student assignment sheet with directions (and different initial amounts) plus teacher information and sample answers are included.
Sodium carbonate reacts with hydrochloric acid producing bubbles
Mass of a Reaction Product
// Wednesday, October 29, 2014 • David Licata
OBJECTIVE: To use the principles of stoichiometry to determine the theoretical yield of a simple reaction, measure the actual yield, and calculate the percent yield.
Limiting PhET
Stoichiometry Resources
// Monday, February 18, 2013 • Deanna Cullen
Moles, mole ratios and stoichiometry have been frustrating topics for many of my chemistry students. The MOLE and Avogadro’s number get tangled up in other Chemistry jargon and students have stared at me like I am speaking another language. I have been around long enough to know this is a problem that many of us have faced. I have tried many ideas that have helped and I want to share a few.