Kc and KpWriting the expression, and what the value tells you.ChemistryThe equilibrium constant is the ratio of product toreactant concentrations at equilibrium, each raisedto its stoichiometric coefficient.Kc = [C]^c[D]^d ÷ [A]^a[B]^bK much greater than 1Products favouredK much less than 1Reactants favouredChanging temperatureK changesThe only thing that changes K.THE COMMON MISTAKEThinking a catalyst or pressure change alters KOnly temperature changes KPressure and concentration shift the position of equilibrium; the constant itselfstays the same at fixed temperature.Kp uses partial pressures. Omit solids and pure liquids from bothexpressions — their activity is defined as 1.Kc and Kplearnposters.com
Kc and Kp — printable physical science wall chart from LearnPosters. Free vector PDF, US Letter and A4.

What’s on the Kc and Kp poster

The rule, 3 worked examples, and the mistake everyone makes.

Kp uses partial pressures. Omit solids and pure liquids from both expressions — their activity is defined as 1.

Questions about the Kc and Kp poster

What’s on the Kc and Kp poster?
The rule, 3 worked examples, and the mistake everyone makes. The equilibrium constant is the ratio of product to reactant concentrations at equili…; Kc = [C]^c[D]^d ÷ [A]^a[B]^b; K much greater than 1 = Products favoured; K much less than 1 = Reactants favoured; Changing temperature = K changes; Common mistake: Thinking a catalyst or pressure change alters K → Only temperature ch…. Kp uses partial pressures. Omit solids and pure liquids from both expressions — their activity is defined as 1.
Who is the Kc and Kp poster for?
Kc and Kp belongs to the Chemistry section rather than to a school year, because physical science is not something one grade owns. Anyone learning physical chemistry can pin it up — a beginner, a student mid-course, or someone revising years later.
When should you use the Kc and Kp poster?
Products over reactants, each raised to its coefficient. Solids and pure liquids are omitted. A wall chart earns its place by being glanceable from where the work is happening, so Kc and Kp belongs on the wall where that physical science work actually happens, within glancing distance, rather than filed away.
What other posters go with Kc and Kp?
Partial Pressures, Born-Haber Cycles and Equilibrium sit alongside Kc and Kp in the Chemistry section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Partial PressuresBorn-Haber CyclesEquilibrium
Is the Kc and Kp poster free to download and print?
Yes. Kc and Kp downloads as a free PDF with no account, no email and no watermark, like everything else in the Chemistry section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
What size does the Kc and Kp poster print at?
Kc and Kp is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Kc and Kp loses nothing.Printing guide

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