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96% M Tue Apr 25 11:49 AM a Chrome File Edit View History Bookmarks People Window Help D Cengage in My Home x YG ENTERTAINMENT x OWLv2 I Online teaching and x 4 chapter 14 Chemical Equilibriu x sjc.cengagenowy.com/ilrn/takeAssignment/takeCovalentActivity.do?locator assignment-take&takeAssignmentSessionLocator; assignment-take Chapter 14: Mastery Review Topics [References] 1 pts M 1. Microscopic Reversibility Use the References to access important values if needed for this question. 2. Calculate K: From Initial One Final ..1 pts Consider the following system at equilibrium where AH -92.7 k, and Ke-180x104, at 298 K. 3- Kp and Kc 1 pts NH4HS(s) NH3(g)+ H2S(g) 1 pts 4. Manipulating K Expressions When some moles of NH4HS(s) are removed from the equilibrium system at constant temperature: 5. Calculate K for Rearranged Equation 1 pts (MO the value of K A. increases. 1 pts M B. decreases. 6. Reaction Quotient Calculate C. remains the same 7. Equilibrium Concentrations: Calculate1 pts W the value of Qc A. is greater than Kc 8 Le Chatelier Concentration B. is equal to Kc. Preparation C. is less than Kc. Question Question the reaction must A. run in the forward direction to restablish equilibrium. B. run in the reverse direction to restablish equilibrium. 9. Le Chatelier. Temperature 1 pts 2req C. remain the same. It is already at equilibrium. the concentration of NH3 will A. increase B. decrease. C. remain the same Submit Answer 7 more group attempts remaining Retry Entire Group Progress: 7/9 groups Previous Next Due Apr 28 at 12:00 AM Hoa AnExplanation / Answer
1) According to Lechatelier's principle, when any of the reactant is removed from a reaction at equilibrium, it tries to oppose it and moves in a direction where it can replenish the loss and hence maintains the equilibrium constant(Kc) constant. Thus, if any of the reactant is removed, the equilibrium shifts to the left hand side to replenish the loss and hence the ratio of product to reactant i.e.- Kc remains constant.
a) When some moles of NH4HS are removed from the equilibrium, the equilibrium moves to left inorder to maintain the equilibrium and hence Kc remains the same.
b) Qc is equal to Kc
c) the reaction must move in reverse directio i.e.- to left to reestablish the reaction
d) since removal of NH4HS shifts the equilibrium to left, the concentration of NH3 decreases.
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