Recently the urban stream in your neighborhood started turning orange, with slimy colored deposits on rocks and in the steam bed. You suspect that this is due to the presence of iron-oxidizing bacteria. After obtaining a water sample, you decided to test the water to figure out what the orange colored deposits are. Explain how you will experimentally determine the identity of the orange substance given the instruments and chemicals available in a chemistry lab.

For a particular redox reaction, BrO−BrO− is oxidized to BrO−3BrO3− and Fe3+Fe3+ is reduced to Fe2+Fe2+. Complete and balance the equation for this reaction in basic solution. Phases are optional. balanced redox reaction: BrO−+Fe3+⟶BrO3-+Fe2+

Balance the following redox reaction in basic solution. H2(g)+Cl₂(9) H2O(l)+Cl (aq) H2(g) + C₁₂ (g) → H₂O(l) + Cl¯ (aq) - ローロ ☑

Animation-Analysis of Copper-Zinc Voltaic Cell Zinc Some oxidation-reduction reactions are spontaneous, and the energy released by them can be used for electrical work. This principle is used in the working of a voltaic cell. Voltaic cells, or electrochemical cells, make use of the electrons that are transferred from the species that releases electrons and undergoes oxidation to the species that accepts electrons and undergoes reduction. If it is possible by any means to separate the oxidation reaction and the reduction reaction and then connect them externally so that the electrons flow from one compartment to the other, you can construct an electrochemical cell. Watch the video that describes the cell reaction and the cell components of a voltaic cell. 1.10 14 of 42 Na₂SO₂(aq) Review | Constants | Periodic Table Z 5042 Cu2+ $0,² In a copper-zinc voltaic cell, one half-cell consists of a Zn electrode inserted in a solution of zinc sulfate and the other half-cell consists of a Cu…

In each of the titrations performed in this experiment, the end point was apparent due to a color change in the material being oxidized or reduced.  Suppose that none of the materials involved in the oxidation-reduction reaction are colored.  Suggest a way one could determine the endpoint in such a case.  (Hint:  Think about acid-base titrations.)

A copper penny can be dissolved in nitric acid but not in hydrochloric acid. Using reduction potentials from your textbook, show why this is so. What are the products of the reaction?

2. Nickel-cadmium batteries employ the following reaction: Cd (s) + NiO(OH) (s) → Cd(OH)2 (s) + Ni(OH)2 (s)   a) Balance this redox reaction in basic solution. b) Use line notation to represent this reaction.

Which statement is NOT true?     During the corrosion, metal cations transform into metal atoms.     During the corrosion, metal atoms oxidized.     The corroding metal surface is called the anode.     During the corrosion, metal atoms lose electrons.

Please do #9.

Be sure to answer all parts. Write out the oxidation half-reaction, the reduction half-reaction, and the complete reaction for the formation of calcium sulfide from the elements Ca and S.  Part 1 out of 3   Write the oxidation half reaction below.