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Chem-Module 15
| Question | Answer |
|---|---|
| Chemical equilibrium | The point at which both the forward and reverse reactions in a chemical equation have equal reaction rates: When this occurs, the amount of each substance in the chemical reaction will not change, despite the fact that both reactions still proceed. |
| Equilibrium constant | K= [C]c[D]d/[A]a[B]b |
| When K is large, the equilibrium is weighted toward the ________ side of the equation | products |
| When K is small, the equilibrium is weighted toward the _______ side of the equation | reactants |
| When K is near unity, the equilibrium is __________ between reactants and the products | balanced |
| When a _______ appears in a chemical equilibrium, it is not included in Equation 15.2 | solid |
| When a ______ appears in a chemical equation, we do not include it in Equation 15.2. This applies only to the _______ phase; it does not apply to the aqueous phase. | liquid |
| Le Chatelier's Principle | When a stress (such as a change in concentration, pressure, or temperature) is applied to an equilibrium, the reaction will shift in a way that relieves the stress and restores equilibrium. |
| Le Chatelier's principles ignores _______ and _______ as a source of stress to the equilibrium. | solids and liquids |
| When an equilibrium is subjected to an increase in pressure, it will shift _______ from the side with the largest number of gas molecules. | away |
| If pressure decreases, the equilibrium will shift ________ the side with the largest number of gas molecules. | towards |
| When temperatures is raised, and equilibrium will shift ______ from the side of the equation that contains energy. | away |
| When temperatures is lowered, the reaction will shift _________ the side the contains energy. | towards |
| Acid ionization reaction | The reaction in which and H+ separates from an acid molecule so that it can be donated in another reaction. |
| Strong acid | An acid in which its acid ionization reaction works very well. |
| Weak acid | An acid in which its acid ionization reaction does not produce many H+ ions. |
| Acid ionization constant | The equilibrium constant for an acid's ionization reaction |
| Acid ionization constant | Ka |
| If the ionization constant of an acid is large, the acid is considered a ______ _______. | strong acid |
| If the ionization constant is not large, the acid is considered a _____ _____. | weak acid |
| pH stands for | potential hydrogen |
| Solutions with pH 0-1.9 are considered | strongly acidic |
| Solutions with pH 2-6.9 are considered | weakly acidic |
| Solutions with pH 7 are considered | neutral |
| Solutions with pH 7.1-12 are considered | weakly basic |
| Solution with pH 12.1-14 are considered | strongly basic |
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akikoandpoog
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