Clarification Statement - S.HS.PS.1.6.CS:
Emphasis is on the application of Le Chatlier’s Principle and on refining designs of chemical reaction systems, including descriptions of the connection between changes made at the macroscopic level and what happens at the molecular level. Examples of des

Assessment Boundary - S.HS.PS.1.6.AB:
Assessment is limited to specifying the change in only one variable at a time. Assessment does not include calculating equilibrium constants and concentrations.

Science and Engineering Practices - 9-12.SEP6.3:
Refine a solution to a complex real-world problem, based on scientific knowledge, student-generated sources of evidence, prioritized criteria, and tradeoff considerations.

Disciplinary Core Ideas - S.HS.PS.1.6.DCI:
PS1.B: Chemical Reactions •(NYSED) In many situations, a dynamic and condition-dependent balance between a reaction and the reverse reaction determines the numbers of all types of particles present. ETS1.C: Optimizing the Design Solution •Criteria may need to be broken down into simpler ones that can be approached systematically, and decisions about the priority of certain criteria over others (trade-offs) may be needed. (secondary to HS-PS1-6)

Crosscutting Concepts - CC6.6:
Much of science deals with constructing explanations of how things change and how they remain stable.