The black “smoke” that flows out of deep ocean hydrothermal vents is made of insoluble metal sulfides suspended in seawater. Of the following cations that are present in the water flowing up through these vents, which ones could contribute to the formation of the black smoke? A. Pb^2+ B. Mg^2+ C. Fe^2+ D. Na^+ E. Li^+ F. Zn^+ G. Ca^2+ H. Mn^2* I. Cu^2+

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A:

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A: On the basis of oxidation state changes we can decide oxidising and reducing agent.

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A: Titration based on redox reaction between the analyte and titrant is known as redox titration.

Q: 4. Consider the following redox equation (balanced) 32 H+ + 4 a. b. 4 Cr20² +3 S2-8 Cr³+ + 3 so + 16…

A:

Q: Balance the following chemical equation (if necessary): H2SO«(aq) + Pb(OH)4(s) Pb(So.)2(s) + H2O(1)

A: The reaction given is  => H2SO4 (aq) + Pb(OH)4 (s) --------> Pb(SO4)2 (s) + H2O (l)

Q: Consider the reaction of 0.161 g of aluminum metal with 50.0 mL of 0.235 M Co(NO₃)₂. a. Which metal,…

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Q: What type of reaction is this? 2 Melz + Mn(SOs2 --> 2 MgSO, + Mnla What type of reaction is this?…

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Q: which one of the following reactions is sulfur reduced?   A.  H2S(aq) + H2O(l)  →  HS–(aq) +…

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Q: Sodium oxalate, Na2C2O4Na2C2O4, in solution is oxidized to CO2(g)CO2(g) by MnO−4MnO4− which is…

A: Given: Volume of MnO4- required to titrate sodium oxalate= 50.3 mL mass of sodium oxalate = 0.342 g…

Q: 23. An excess of AgNO3 reacts with 185.5 mL of an AlCl3 solution to give 0.325 g of AgCl. What is…

A: Given, Volume of AlCl3 solution = 185.5 mL = 0.1855 L    (1 mL = 0.001 L) Mass of AgCl = 0.325 g…