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360Science™: Applications of Le Chatelier’s Principle

By: The Flinn Scientific Staff

360Science™ blends the best of student-engaging digital content with easily adaptable hands-on labs to offer your students a uniquely comprehensive learning experience.

In this lab experience, students investigate four different chemical reactions to gain a deeper understanding of equilibrium and Le Chatelier’s principle. They apply deliberate stresses on these systems to cause their equilibrium to shift. Editable, differentiated instructions range from a time-sensitive prescriptive lab to full open inquiry, and robust online videos and content—including a virtual reality (VR) simulation—help students prepare for and better understand the labs they’re conducting.

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360Science™: Applications of Le Chatelier’s Principle
 Chemical equilibrium, Le Chatelier’s principle, acid–base reactions, solubility equilibria, endothermic and exothermic reactions
Outcomes: Students will explore the equilibrium state of various reactions. The equilibrium of bromothymol blue, an acid–base indicator, will shift depending on the pH of the solution. Acidification of the bromothymol blue solution will cause the solution to turn yellow, whereas adding a base will cause the solution to turn blue. The reaction between copper(II) ions and ammonia (NH3) will generate [Cu(NH3)4]2+, a complex ion that imparts a deep blue color to the solution. Acidification of this solution will reverse the reaction due to the conversion of ammonia into ammonium ions (NH4+) which do not bind to copper(II). In the guided, open, and advanced versions, the formation of [CoCl4]2– upon reaction of [Co(H2O)6]2+ and chloride ions (Cl) will oscillate depending on the concentration of chloride ions and the temperature of the system. Decreasing the concentration of chloride ions will favor the formation of [Co(H2O)6]2+ from [CoCl4]2– and vice versa. Heating up the [Co(H2O)6]2+ solution will shift the equilibrium toward production of [CoCl4]2–. Milk of Magnesia, primarily composed of magnesium hydroxide (Mg(OH)2), is poorly soluble in water; the solubility of this compound in water will increase upon addition of an acid, which shifts the equilibrium toward generation of Mg2+ and OH ions.
Associated Phenomena: What happens when food is cooked? 

Our 1-year option provides access to all digital content for one year plus lab supplies for a single class of 30 students. Our 3-year option extends access to digital content to three years, with a 30% discount on refill supply kits years 2 and 3.

What is Flinn 360Science™?
We’re introducing a whole new way to teach experiential science! We’ve taken a hard look at science study from all perspectives and, thanks to the feedback of thousands of teachers nationwide, we’ve created a way to make it easier to provide personalized instruction while delivering the kind of lab experiences your students truly need.

Our new and comprehensive learning solutions are designed to bring science to life by giving you all the tools you need to incorporate more (and effective) hands-on learning in your classroom or lab. 360Science allows you to provide your students with the support they need to make real-world connections to key scientific principles and help make those abstract concepts concrete.

Every 360Science lab solves the most common challenges educators face in bringing more hands-on science to their students—from not having enough time to matching the right level of challenge for students’ abilities to providing appropriate background content, safety techniques, assessments and more.

Enable student-driven, blended learning through a unique combination of leveled lab instructions supporting prescriptive, guided- and open-inquiry lab exercises (see PDF resource for specific details) with robust digital content, such as videos and carefully curated Open Educational Resources (OER)—along with virtual reality and simulation exercises. From editable, digital instructions to assessments and alignment with Next Generation Science Standards (NGSS), we have everything you need to improve mastery, remove the intimidation factor and foster your students’ natural curiosity.

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Constructing explanations and designing solutions
Using mathematics and computational thinking

Disciplinary Core Ideas

HS-PS1.B. Chemical Reactions

Crosscutting Concepts

Stability and Change of Systems
Energy and Matter in Systems

Performance Expectations

HS-PS1-5: Apply scientific principles and evidence to provide an explanation about the effects of changing the temperature or concentration of the reacting particles on the rate at which a reaction occurs.
HS-PS1-6: Refine the design of a chemical system by specifying a change in conditions that would produce increased amounts of products at equilibrium.
HS-PS1-7: Use mathematical representations to support the claim that atoms, and therefore mass, are conserved during a chemical reaction.