In a redox reaction, the total number of electrons gained is greater than the to

Question

In a redox reaction, the total number of electrons gained is greater than the total number of electrons lost. less than the total number of electrons lost. equal to the number of electrons lost. not related at all to the number of electrons lost. A substance undergoing oxidation will lose electrons. lose oxygen. gain hydrogen. gain electrons. In which of the following partial reactions is the reactant undergoing reduction? (Note: The reactions are not complete.) PbO rightarrow Pb KCIO_2 rightarrow KCIO_3 SnO rightarrow SnO_2 Cu_2O rightarrow CuO What is die oxidation number of bromine in Br_2? 0 -1 +7 -5 Which species is oxidized in the following equation? 2 Na + Cl_2 rightarrow 2 NaCl Na Cl2 Na^+ Cl^-1 Which occurs when an oxygen atom is reduced? Two protons are gained Two protons are lost Two electrons are gained Two electrons are lost In a voltaic cell (electrochemical cell), oxidation occurs at the Anode Cathode Internal circuit External circuit The reducing agent is the species that is reduced. the species with a negative charge. the spec.es that loses electrons. the species that gains electrons. Which substance is an oxidizing agent? NaOH H_2O_2 HCI NaCl A substance that reduced as a lead-acid storage battery' generates an electric current is Pb. PbSO_4. PbO_2. H_2SO_4. Photochromic lenses contain onliy AgCl embedded in the glass. Only CuCl embedded in the glass. both AgCI and CuCI embedded in the glass. neither AgCI nor CuCI embedded in the glass. This substance is a powerful oxidizing agent and a harmful pollutant; yet a layer of it in the upper stratosphere serves as a shield from harmful ultraviolet radiation from the sun. CO_2 O_2 SO_3 O_3 (ozone) An alpha particle is the same as a deuterium. helium-4 nucleus. elium-5 nucleus. proton.

Explanation / Answer

1) C) equal to the number of electron lost

2) A) lose electron

3) A) PbO -----> Pb

4) A) 0

5) C) Na+

6) C) two electrons are gained

7) A) anode

8) C) the species that loses electron

9) B) H2O2

10) B) PbSO4

11) C) both AgCl and CuCl embedded in the glass

12) D) O3 (ozone)

13) B) helium 4 nucleas

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