If more Fe(NO_3)(i.e.Fr^1+) is added to the system above. a. The color in the te

Question

If more Fe(NO_3)(i.e.Fr^1+) is added to the system above. a. The color in the test tube becomes a deeper red color because the equilibrium shifted left. b. The color in the test tube becomes a deeper red color because the equilibrium shifted right. c. The color in the test tube becomes a lighter yellow color because the equilibrium shifted left. d. The color in the test tube becomes a lighter yellow color because the equilibrium shifted right. 9) The reaction above turned deeper red color when placed in an face bath. This means that the react a) Endothermic b) Exothermic C) Neither d) more 10) What happens to the equilibrium if the pH is decreed in the following system... F(aq) + H_2O(I) double head arrow HF(aq) + OH(aq) a) Shifts right b) Shifts left c) No change d) more H_2O for

Explanation / Answer

8: When we add Fe3+(aq), the concentration of the reactant, Fe3+(aq) increases. Now in order to keep the equilibrium constant same, more and more reactant should convert into product. Hence the equilibrium shifts towarsa right(product). Hence more and more product is formed making the color deep red. Hence option (B) is correct.

Q.9:When we keep the reaction vessel in ice bath, the temperature decreases. Here a decrease in temperature favors the formation of product making the solution deep red. Hence the reaction is exothermic. Hence option (B) is correct.

Q.10: When we decrease the pH, the concentration of H+(aq) ion increases and the concentration of OH-(aq) decreases. As the concentration of OH-(aq) decreases more and more reactant will combine to form the product OH-(aq). Hence the equilibrium shifts towards right(product side). Hence option (A) is correct.

Q.11: When we increase the concentration of N2, it will combine with more and more H2 to form NH3, inorder to keep the Keq constant. Hence the reaction ahifts towards right and not towards left. However in rest of the cases the equilibrium shifts towards left. Hence option (C) is correct.

Q.12: If we remove H2 from the system, more and more NH3 will decompose to form H2 and N2 in order to keep the Keq constant. Hence the equilibrium shifts towards left.

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