Chapter Transition Metals and Coordination Complexes.
4.6: Calculating Equilibrium Concentrations with the "x-is-small" Approximation
What are the equilibrium concentrations in a 0. Please enter your email address so we may send you a link to reset your password. To X of small the full video start a free trial today. Full Table of Contents.
When we solve this type of problem, we view the system as equilibrating from the products side of the reaction rather than the reactants side. Chapter Chemical Kinetics.
Chapter 8: Periodic Properties of the Elements. JoVE Core Chemistry. If the percent ionization is greater than 5 however, we X of small to go back and use the quadratic equation to find the actual value of x.
If this assumption is true, then it simplifies obtaining x, X of small. Chapter Radioactivity and Nuclear Chemistry.
Please enter an institutional email address. If it is larger, you cannot apply it and you have to solve for x using the quadratic formula.
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However this approximation requires us to check the percent ionization to ensure our approximation is not too large. Chapter 6: Thermochemistry. Please enter X of small Institution or Company email below to check. Cheeks are the concentrations at equilibrium of a 0.
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Chapter Chemical Equilibrium. Chapter 7: Electronic Structure of Atoms.
Chapter Acid-base and Solubility Equilibria. Next Video Embed Languages Share. Chapter Biochemistry. Create Account. Assume that x is much less than 0.
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In this example, solving the exact quadratic equation and using approximations gave the same result to two significant figures. The small x assumption is an approximation that can be used under certain conditions to simplify solving the equilibrium expression and to avoid using the quadratic formula. Previous Video Next Video. In this case, chemical intuition can provide a simpler solution, X of small.
From the equilibrium constant and the initial X of small, x must be small compared to 0.
Chapter Solutions and Colloids. The approximate solution is thus a valid solution. With this condition, you can assume that the concentration of the reactants stays the same throughout the reaction to equilibrium because a very small amount is being consumed to X of small products. Check access. Chapter Thermodynamics. Chapter Acids and Bases. Chapter 9: Chemical Bonding: Basic Concepts.
Reset Password. Lim, Kieran F. You might already have access to this content! Chapter Electrochemistry. Chapter Liquids, Solids, and Intermolecular Forces.