Voltaic cells - Study guides, Class notes & Summaries

Chemistry Final Exam (Answered) Oxidation Rules Rule 1: The oxidation number of an element in its free state = 0 (Also true for diatomic elements) -Mg=0,H2=0, C=0 Rule 2: The oxidation number of a monatomic (one-atom) ion is the same as the charge on the ion -Mg^2+=+2, Na^+=+1, O^2-=-2 Rule 3: The sum of all oxidation numbers in a neutral compound is zero. The sum of all oxidation numbers in a polyatomic (many-atom) ion is equal to the charge on the ion. Rule 4: The oxidation numb...

CHEM 210 Exam 2 Questions with Correct Answers A reaction in which electrons are transferred from one reactant to another - Answeroxidation-reduction Loss of electrons - Answer-Oxidation Gain of electrons - Answer-Reduction Oxidation takes place at the surface of an electrically conductive material called - Answer-anode The reduction takes place at another electrically conductive surface called the - Answercathode __________ cells use a spontaneous oxidation-reduction reaction to produ...

CHEM 210 Exam 2 Questions with Correct Answers A reaction in which electrons are transferred from one reactant to another - Answeroxidation-reduction Loss of electrons - Answer-Oxidation Gain of electrons - Answer-Reduction Oxidation takes place at the surface of an electrically conductive material called - Answer-anode The reduction takes place at another electrically conductive surface called the - Answercathode __________ cells use a spontaneous oxidation-reduction reaction to produ...

electrochemistry - correct answer study of relationship between chemical reactions and movement of electrons or ions 3 areas of focus in electrochemistry - correct answer 1. chemical reactions that produce a current 2. chemical reactions that need a current to occur ex. electroplating 3. controlling reactions that are spontaneous but undesirable (ex. corrosion) during an electrochemical reaction -...

Chapter 1 description & Electronics Technician Exam 89 Questions with Verified Answers Electricity - CORRECT ANSWER Energy due to electric charges at rest or in motion that can be transmitted to produce effects such as heat, light, motion or sound. Electric Charge - CORRECT ANSWER An electrical property of matter that creates electric and magnetic forces and interactions. Positive (+) - CORRECT ANSWER An electric field lacking electrons. Negative (-) - CORRECT ANSWER An electric fiel...

CHEM 210 Exam Questions and Correct Answers What is a cathode? - Answer-a negative electrode at which reduction occurs What is an anode? - Answer-the positive electrode at which oxidation occurs Good way to remember which is which for anode and cathode - Answer-An Ox and a Red Cat What is the two electrode setup? - Answer-anode and cathode What is a galvanic cell? - Answer-A cell in which spontaneous oxidation-reduction reactions produce electrical energy (anode and cathode Zn and Cu) ...

CHEM 210 TEST QUESTIONS 100% SOLUTIONS Which one of the following is not a redox reaction? - ANSWER Al(OH)4-(aq) + 4H+(aq) ® Al3+(aq) + 4H2O(l) Consider the reaction CuO(s) + H2(g) ® Cu(s) + H2O(l) In this reaction, which substances are the oxidant (oxidizing agent) and reductant (reducing agent), respectively? - ANSWER CuO and H2 When the following redox equation is balanced with smallest whole number coefficients, the coefficient for nitrogen dioxide will be _____. I2(s) + HN...

CHEM 210 Exam 2 Questions with Correct Answers A reaction in which electrons are transferred from one reactant to another - Answeroxidation-reduction Loss of electrons - Answer-Oxidation Gain of electrons - Answer-Reduction Oxidation takes place at the surface of an electrically conductive material called - Answer-anode The reduction takes place at another electrically conductive surface called the - Answercathode __________ cells use a spontaneous oxidation-reduction reaction to produ...

Portage Chemistry Test 4 Exam Questions With 100% Correct Answers Voltaic cell - answergenerate electrical energy through spontaneous chemical reactions Electrolytic cells - answeruses electrical energy to drive nonspontaneous chemical reactions What electrochemical half-reaction occurs at the anode - answerOxidation What electrochemical half-reaction occurs at the cathode - answerReduction Why is the lead-acid battery secondary/storage battery - answerBecause it is rechargeable Why is th...

Electricity for the Trades, 3e (Petruzella) Chapter 3 Sources and Characteristics of Electricity 1) One of the simplest ways to produce static electricity is by friction. Answer: TRUE Difficulty: 1 Easy Learning Objective: Explain how static positive and negative charges are produced. Bloom's: Understand Accessibility: Keyboard Navigation 2) An electrostatic field is represented graphically by magnetic lines of force. Answer: FALSE Difficulty: 1 Easy Learning Objective: Explain how st...