Learning Goa MY Answers Give Up To use the equilibrium constant and Le Chåteler\

Question

Learning Goa MY Answers Give Up To use the equilibrium constant and Le Chåteler's principle to determine how a reaction will respond to external factors Correct This part was meant to show, mathematically, why an increase in the concentration of a reactant wil cause a shift toward products A reaction is at equilibrium when the concentrations of the reactants and products no longer change over time. This does not mean the reaction is over, rather, two competing reactions continue to occur simultaneously at equal rates The two competing reactions are the forward reaction (reactants products) and the reverse reactor (products reactants) Part D The following reaction is at equilibrium in a 20-L vessel K-24 10 If a reaction at equilibrium is subjected to a stress, the concentratons of reactants and products adjust to reestablish equiibrium. This is called Le Chatelier's principle. A stress might be a change in the concentration of reactants or products, a change in the volume of the reaction container, a change in temperature, or the How do the following actions affect the equilibrium of the reaction? Drag the appropriate items to their respective bins. Hints addition of a catalyst Reset Help decrease velume increase volume add catatyst add coine ga remove shosphorus tric hioride gas Shin to products No shin

Explanation / Answer

First, let us state the Le Chatelier principle which deals with changes in an equilibrium:

The statement is as follows:

If any equilibrium is disturbed, that is, change in conditions such as P,T, concentration, partial pressure, etc.., the system will counterbalance such change in order to favour the system's equilbirium.

in order to shift towards reactants:

- increase in V will favour most moles of species, therefore reactants

- removal of PCl3 will favour PCl3 and Cl2 increase

in order to shift to products

- decreae in V, since the least mol is preferred

- addition of Cl2 favours more PCl5 production

No shift

- addition of catalyst will only aid to decrase time of reaction, will not change Q coefficients

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