12. If NaCl is added to a saturated solution of AgCl, the equilibrium will shift
ID: 694793 • Letter: 1
Question
12. If NaCl is added to a saturated solution of AgCl, the equilibrium will shift back towards the reactants; and the solubility of AgCI will decrease. 19. In the formation of iron (II) oxide, which species is being reduced? Fe(s) + O2(g) FeO(s) True False 13.The higher the K, of the salt, the less soluble the salt. (~ c C. Fe O True 20. What is the E value for the Galvanic cell formed from these two half-reactions at these concentrations? False 14. An oxidation occurs at the of a Galvanic cell Cd"(aq) + 2e Cd(s) ; [Cd*) = 0.50 M Mg"(aq) + 2e Mg(s): [Mg"]-2.75 M a. 1.99 V a. anode b. p-n junction C. intersection d. cathode 15. Balance the following electrochemical reaction in acid Mino, (aq) + Zr(s) Mn"(aq) + Zr"(aq) Eo=-0.4031 Eo=-2.37 V b. 1.95 v c. 2.20 V d. 1.90 V 21 . what is the Eo value for the Galvanic cell formed from these two half-reactions? a. MnO.(aq) + Zr(s) Mn'"(aq)+ Zr"(aq) + 5 e b. 2 Mno. (aq) + 16H(aq) + S Zr(s) 2 Mn'"(aq) + 5 Zr (aq)+8 H,O(0) c. 2 Mno. (aq) + 811 (aq) + 5 Zr(s) 2 Mn"(w) + S Zr (aq) + 8 HO) d. 2 MnO.(aq) + 5 Zr(s)--2 Mn>(aq) + 5 Zr"(ag) 16. How many grams of silver are deposited at a platinum Ni2+(aq) + 2e Ni(s) Mn2+(aq) + 2e Mn(s) E' =-0.25 V E) =-1.18V b. -0.93 V d. +1.43 V 22. What is the oxidation number of Cl in HCIO? a. +0.93 V cathode in the electrolysis of AgNO,(aq) by 5.30 amps of electric current in 4.0 hours? a. 188 g c. 42.6 g 23. Electrolysis involves using an external current to drive an electrochemical reaction in a non-spontaneous direction b. 85.3 g d. 121 g 17. Identify the correct balanced chemical equation for the cell: Al(s)A13+(aq)Hg2+(ag)Hg() False 24. In balancing electrochemical half-reactions in acidic media, one can assume an excess of both water and OH a. 2 Al(s) + Hg"(aq) 2 A!"(aq) + Hig(/) b. 2 Al(s) + 3 Hg..(aq) 2 Al"(aq) + 3 Hg(1) c. Al(s) + Hg"(aq) Al"(aq) + Hg(1) d. Al(s) + 3 Hg"(aq) Al"(aq) + 3 Hg(l) True False 25. The Nernst equation describes the pli require convert electrolytic reactions into spontaneous cells 18. In a redox reaction a. there is a transfer of protons from one species to another True b. electrons are created. c. electrons are transferred between two species. d. the reaction always moves in a reverse direction. FalseExplanation / Answer
12)
The solubility equation of AgCl is:
AgCl <—> Ag+ + Cl-
Adding NaCl is like adding Cl-.
So, we are adding product
chatelier Principle
So, Equilibrium moves to reactant side
That is more AgCl is formed
Thus solubility decreases
Answer: True
13)
Higher Ksp implies higher solubility
Answer: False
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