Electrochemistry, assignment help
QUESTION 1Oxidation-reduction reactions are reactions in which:protons are transferred from one reactant to anotherelectrons are transferred within the same atomelectrons are transferred from one reactant to anotheroxygen molecules must participate3 points Save AnswerQUESTION 2In a reaction, oxidation can occur independently of reduction.TRUEFALSE2 points Save AnswerQUESTION 3Preventing the rusting of iron is a major industry. Which of the following methods would NOT control the amount of iron corrosion?keep the iron sample drycoat the iron sample with a waterproof coatingplace a sacrificial electrode in contact with the ironbathe the iron in a weakly acidic solution3 points Save AnswerQUESTION 4The oxidation number of an atom of a free element is always 1.TRUEFALSE2 points Save AnswerQUESTION 5In their compounds, metals:are assigned positive oxidation numbersare assigned negative oxidation numbersare assigned oxidation numbers of zerocan be assigned any oxidation number that balances the equation3 points Save AnswerQUESTION 6In the reaction, C + 2 S Imported Asset CS2, the substance that is the oxidizing agent is:the Cthe Sthe CS2both the C and the S3 points Save AnswerQUESTION 7In the reaction, 2 Al (s) + 3 Sn+2 (aq) Imported Asset 2 Al+3 (aq) + 3 Sn (s), the reducing agent is:the Althe Sn+2the Al+3the Sn3 points Save AnswerQUESTION 8How many electrons should be added to balance the following oxidation half-reaction, H2O2 Imported Asset 2 H+ + O2?NoneOneTwoFour3 points Save AnswerQUESTION 9When balancing the oxidation and reduction half-reactions for basic solutions, you should:use H+ and OH equally in order to balance the equationuse H+ only in order to balance the equationuse H+ and H2O, as needed to balance the equationuse OH and H2O, as needed to balance the equation3 points Save AnswerQUESTION 10Electrochemical reactions are oxidation-reduction reactions that:are capable of generating electric currenthave unequal oxidation numbers on both sides of the equationonly generate the oxidation reactiononly generate the reduction reaction3 points Save AnswerQUESTION 11The voltaic cell produces electric current from a spontaneous chemical reaction, but electrolytic reactions are not spontaneous.TRUEFALSE
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