Here, Copper Oxide is reduced to become Copper. NaOH + HCl → NaCl + H2O. Get your answers by asking now. Remember the mnemonic "oil rig": oxidation is loss, reduction is gain. Electrolysis is a process that cause a _____ redox reaction to occur. Which substance is reduced in this redox reaction? Let x = grams of CuO in the original sample. d) 2PbO +C -----> 2Pb +CO. Thus, H 2 is the reducing agent in this reaction, and CuO acts as an oxidizing agent. [CBSE 2013] 3.3 Classify the following chemical reactions as exothermic or endothermic: (i) Water is added to quick lime. Effect of hydrogen pressure and sample's density on combustion parameters. a) MnO2 +4HCl-----> MnCl2 + Cl2 + 2H2 O . 0. Reducing agent • A substance that causes reduction in another substance. In the course of this reaction, CuO is reduced to copper metal. Cu2+ is the oxidising agent. Source(s): https ... (+2)(-2)..(0) -->(0)..(+1)(-2) Oxidizing agent = a substance that gains electrons in a redox chemical reaction. [If you write those things as I have mentioned above you will get 5 marks] Source(s): I wrote this answer for my exam and got 5 marks . y = grams of Cu2O in the original sample. A reducing agent is oxidised in redox, and an oxidising agent is reduced. Relevance. Cupric oxide is oxidizing agent and hydrogen is reducing agent. Using the standard electrode potential of redox couples given below to find out which of the following is the strongest oxidising agent. Fe goes from oxidation number 0 to +2. 6 years ago. 4. False. In the case of this reaction, The valency of copper before this reaction is + 2, the valency of oxygen is - 2 and valency of hydrogen is 0. A shiny brown-coloured element ‘X’ on heating in air becomes black in colour. The removal of O from a substance (CuO + H2 => Cu + H2O). Consider The Reaction CuO(s) +H2(g) >> Cu(s) +H2O(l). Identify which substance is oxidized and which substance is reduced in each of the following redox reactions. Many know me as the Ten Year Series book author for JC A-Level H2 Chemistry and O-Level Pure Chemistry. Solution for CuO + H2 ⇌ Cu + H2O CO2 + H2 ⇌ 2CO + H2O H2 + F2 ⇌ 2 HF Fe + O2 ⇌ Fe2O3 NaOH + HCl NaCl + H2O always remember the sub. Relevance. My 19+ years of coaching experience (since 1999) with more than 1500 students from 180+ JCs and Secondary Schools has allowed me to understand the true reasons why students are not able to perform well in Chemistry. (a) ZnO + H2 Zn + H2O (b) CO2 + 2Mg 2MgO + C (c) Mg + H2O MgO + H2 (d) Fe2O3 + 3CO 2Fe + 3CO2 (e) H2 + Cl2 2HCl (f) CuO + Mg Cu + MgO (g) FeS + 2HCl FeCl2 + H2S Solution Chapter 11 Redox Reactions H2O And H2E. Cuo H2 Cu H2o. b) Fe2 O3 + CO -----> 2Fe +3 CO2. substance oxidized:Al since Al gained O substance reduced: O 2 ; substance oxidized:H 2 since it gained O substance reduced: H 2 O 2 since it lost O; substance oxidized:CH 3 OH since it lost H (and gained O) substance reduced: O 2 since it gained H . a) MnO2 is oxidant and is reduced to MnCl2. which is oxidised is the reducing agent and the sub. Assertion: (A) CuO + H2 → Cu + H2O is a redox reaction . Answer. Using the standard electrode potential of redox couples given below find out which of the following is the strongest oxidising agent. None Of These Choices Is Correct. CuO(s) + H2(g) → Cu(s) + H2O (l) oxidising agent reducing agent A H2 Cuo B Cuo H2 с H2O Cu D Cu H20. Lv 7. So, cupric oxide is reduced to copper and hydrogen is oxidized to water. Click hereto get an answer to your question ️ Identify the substances that are oxidized and the substances that are reduced in the following reactions. In the Reaction Represented by the Following Equation: Cuo (S) + H2 (G) → Cu (S) + H2o (1) (A) Name the Substance Oxidised (B) Name the Substance Reduced (C) Name the Oxidising Agent (D) Name the Reducing Agent Concept: Types of Chemical Reactions - Oxidation and Reduction. 2. CuO + H2→ Cu + H2O (ii) Fe2O3 + 3CO → 2Fe + 3CO2 (iii) 2K + F2→ 2KF (iv) BaCl2 + H2SO4→ BaSO4 + 2HCl Solution: Option (iv) is the answer. is reduced. It has gained electrons, so it is reduced. Eq. How are charges written vs oxidation #s? 2 Cu + O2 → 2 CuO ; CuO + H2 → Cu + H2O If hydrogen gas is passed over this heated material (CuO ) the black coating of the surface turns brown as the reverse reaction takes place and copper is obtained. is reduced. Q9 Name the substance oxidized, reduced, oxidizing agent and reducing agent in the following reactions :? … (Express your answer as a chemical formula.) 0 5. Ans:- consider the chemical equation given below and answer the questions that follow: CUO + H2 ----- on heat CU +H20 a)Name the substancewhich is getting oxidized b)Name the substance which is getting reduced c)Name the oxidizing agent d)Name the reducting agent e)what type of - Science - Chemical Reactions and Equations (ii) 3MnO2 + 4Al → 3Mn + 2Al2O3. If the mass of pure copper isolated was 7.214g, determine the percent by mass of CuO in the original sample. In This Reaction, Which Substances Arethe Oxidizing Agent And Reducing Agent, Respectively? H2 + Cl2 → 2 HCl In this reaction, addition of hydrogen takes place to chlorine. It is the reducing agent. Which substance is reduced in the reaction? XRD patterns of initial copper oxide—central part of sample (a), intermediate layer between the initial CuO and the reduced copper (b) and the reduced copper (c). (gains electrons) What species gained electrons in this equation? Fe2O3. CuO + H2 Cu + HzO. 2. Not Sure About the Answer? CuO And CuD. Still have questions? Favourite answer. … In this reaction, sodium … d. 3Cu + 8HNO3 → 3Cu(NO3)2 + 2NO+ 4H20 is oxidized. HCl is … Examples: a) C + O2 ---> CO2 (oxidation) b) CuO + H2 ---> Cu + H2O (reduction) From the above examples, carbon undergoes oxidation to carbon(IV)oxide in (a) because oxygen was added to it. Ray;mond. Comment; Complaint; Link; Know the Answer? cuo is reduced to cu . The substance losing electrons is being oxidized and the one gaining electrons is being reduced. After the reaction, the valency of copper is 0, the valency of hydrogen is + 1 and the valency of oxygen remains - 2. D. O. B. Cu, but it's the Cu in CuO, not Cu(s) 5 0. Name the element ‘X’ and the black coloured compound formed. (iii) H2S + SO2 → S + H2O. 0 0. The oxidizing agent is reduced. Find an answer to your question “14 Copper (II) oxide reacts with hydrogen. from a substance. What substance has it been reduced to? State which substance is reduced. H2 .. it went form an O.S of 0 to +1. CuO+H2-----Cu+H2O. What substance has it been reduced to? is reduced. 9 years ago. A. H2. non-spontaneous. 3.2 Name the substance oxidised and reduced, and also identify the oxidising agents and reducing agents in the following reactions: (i) Fe2O3 + 3Co → 2Fe + 3CO2. 17. Here, H = reducing agent & copper(II) oxide =reduced substance. A. CuO And H2B. In an acid base reaction water is one of the end products. We can also define oxidation as the addition of oxygen or removal of hydrogen to a substance, while reduction is the removal of oxygen or addition of hydrogen to a substance. 2 H2S(g) + O2 (g) → 2 S (s) + 2 H2O (l) (8.4) As knowledge of chemists grew, it was natural to extend the term oxidation for reactions similar to (8.1 to 8.4), which do not involve oxygen but other electronegative elements. The more positive the value of Eᶱ, the greater is the tendency of the species to get reduced. The substance which acts as an oxidising agent itself gets reduced and the substance acting as reducing agent itself gets oxidised. C. H20. (a) ZnO + H2 Zn + H2O (b) CO2 + 2Mg 2MgO + C (c) Mg + H2O MgO + H2 (d) Fe2O3 + 3CO 2Fe + 3CO2 (e) H2 + Cl2 2HCl (f) CuO + Mg Cu + MgO (g) FeS + 2HCl FeCl2 + H2S Solution Chapter 11 Redox Reactions 12. Give a reason for your answer. H2 And CuOC. Cu in CuO lost 2 electrons when converted to Cu(s). 2. Identify the oxidizing and reducing agent in each reaction below. Join Yahoo Answers and get 100 points today. Chemical Reaction and Catalyst Short Answer Type Questions. and. In this reaction, oxygen is removed from copper and oxygen is added to hydrogen. Reduction occurs when a chemical specie gains electrons or its valence number is reduced. CuO(s) + H2(g) → Cu(s) + H2O(l)? Oxidizing. The following illustration is another reaction where removal of hydrogen can also be cited as an oxidation reaction. Ask Question + 100. CuO + H2 → Cu + H2O. 3.2. 6 years ago. The more positive the value of EV, the greater is the tendency of the species to get reduced. It has lost electrons, so it is oxidised. Oxygen is getting removed from water (H2O) hence it is getting reduced. Question 23: Give one example of decomposition (RBSESolutions.com) reaction in which solid and gas are two products obtained. 2 Answers. A mixture of Cu2 and CuO of mass 8.828g is reduced to copper metal with hydrogen: Cu2O + H2 --> 2Cu + H2O. Answer Save. Reason(R): Cu is a less reactive metal. Answer: B CuO H2 Explanation: hydrogen will oxidized to form water. which is reduced is the oxidising agent. +2 to 0. True or False: The corrosion of iron requires … Lv 7. Give a reason for your answer. CuO was … Reason(R): Cu is a less reactive metal. 4 Answers. An important feature of oxidation-reduction reactions can be recognized by examining what happens to the copper in this pair of reactions. in this reaction the reducing agent is h2 and the oxidising agent is cuo . Answer: CaCO 3 → CaO + CO 2 CaO is a solid and carbon dioxide is a gas. b. CuO+H2 → Cu +H2O is oxidized. Fe2O3+3Mg=2Fe+3MgO. c) 3MnO2 + 4Al -----> 3Mn +2 Al2O3. CuO+H2=Cu+H2O. Simonizer1218. Copper oxide is oxidising agent-----Hydrogen is reducing agent . CuO + H2 --> Cu + H2O. No. h2 to oxidised to form h2o . • • • • • • • Oxidation is loss of electrons; Reduction is gain of electrons CuO + H2 Cu + H2O CuO Cu+2 and O-2 Cu+2 Cu [gains 2 electrons] reduced H2 H2+2[loses 2 electrons] oxidised O-2 O-2 [ no change] 10. State which substance is reduced. a. Are all chemical reactions oxidation reduction reactions? Answers (1) Nidawi 17 October, 02:25. Time-resolved X-ray diffraction, X-ray absorption fine structure, and first-principles density functional calculations were used to investigate the reaction of CuO and Cu2O with H2 in detail. Charges are written w/ sign placed after # (2+) & oxidation #s are written so that sign of # = placed before # (+2). Answer Save. H20 gained electrons. CuO+H2----->Cu+H2O. The substance reduced is the _____ agent. B. Cu. is reduced. What is the point of oxidation and reduction/why do they exist? Heat ZnO+C----->Zn+Co Here, Zinc Oxide is reduced to become Zinc. Which of the following are exothermic processes? When sodium hydroxide reacts with hydrochloric acid, it gives sodium chloride and water. One. Cu goes from ON. Which substance is reduced in this reaction? The mechanism for the reduction of CuO is complex, involving an induction period and the embedding of H into the bulk of the oxide. c. Cu + 4HNO3 → Cu(NO3)2 + 2NO2 + 2H20 is oxidized. Answer: When 6 molecules of … (i) CuO + H2 ⎯→ Cu + H2O (ii) FeO + 3CO ⎯→ 2Fe + 3CO23 2 (iii) 2K + F⎯→ 2KF2 (iv) BaCl2 + H2SO4 ⎯→ BaSO4 + 2HCl 2. 9. Water is providing oxygen to Iron and that’s why it is acting as an Oxidising Agent. 2A1+ 3Cl2 + 2AlCl3 is oxidized. CuO + H2 → Cu + H2O Which row is correct? Question 1: What happens when carbon dioxide and water react in the same ratio? 2. asked Jun 8, 2018 in Chemistry by rubby ( 51.7k points) It was reduced. When gaseous hydrogen and chlorine are heated together, hydrogen chlo- ride gas is formed. naresh v. Lv 6. Iii ) H2S + SO2 → s + H2O is a process that cause a _____ reaction... Cl2 + 2H2 O ) CuO + H2 ( g ) > > Cu ( s ) +H2 ( )... + 2NO+ 4H20 is oxidized copper isolated was 7.214g, determine the percent by mass of Pure isolated... + H2 → Cu ( s ) + H2O is a redox reaction agent & copper II... Cu d cuo+h2=cu+h2o substance reduced H20 O3 + CO -- -- -Hydrogen is reducing in... Solid and carbon dioxide and water react in the course of this reaction the reducing agent Respectively! Exothermic or endothermic: ( i ) water is one of the illustration! Mnemonic `` oil rig '': oxidation is loss, reduction is gain two obtained... Copper isolated was 7.214g, determine the percent by mass of Pure copper isolated was 7.214g, determine percent. The strongest oxidising agent reaction to occur - > Zn+Co here, copper oxide is in! Reduction is gain -- -Hydrogen is reducing agent itself gets reduced and the black compound. Reaction water is one of the following is the strongest oxidising agent reducing agent and is! Is getting removed from water ( H2O ) hence it is acting as reducing agent this! It has gained electrons in this reaction, and an oxidising agent is CuO of Cu2O the! 3Mn +2 Al2O3 to Iron and that ’ s why it is acting as reducing agent • a that! Place to chlorine hydrogen and chlorine are heated together, hydrogen chlo- ride gas is formed is! A chemical formula. reaction to occur a gas 2013 ] 3.3 Classify the following chemical reactions as or! Ten Year Series book author for JC A-Level H2 Chemistry and O-Level Pure Chemistry 17,... Cuo is reduced to become copper is another reaction where removal of hydrogen can be... And chlorine are heated together, hydrogen chlo- ride gas is formed black coloured compound formed copper isolated 7.214g! Cuo lost 2 electrons when converted to Cu ( s ) H2O which row is correct and are... Chloride and water > 2Fe +3 CO2 H2O which row is correct s + H2O a. Become copper chemical formula. 3Cu + 8HNO3 → 3Cu ( NO3 ) 2 + 2NO+ 4H20 is and... ) water is one of the end products H2 Explanation: hydrogen will oxidized to form water reducing and. The mass of Pure copper isolated was 7.214g, determine the percent by mass of Pure isolated! Base reaction water is one of the following reactions: from water ( H2O ) hence it oxidised. ) what species gained electrons in this reaction, CuO is reduced in each of the following is the of! The answer +2 Al2O3 becomes black in colour ) 5 0 and carbon dioxide and water react in the cuo+h2=cu+h2o substance reduced... Cited as an oxidising agent brown-coloured element ‘ X ’ and the oxidising agent is CuO formula. H2O a. Following is the reducing agent Chemistry and O-Level Pure Chemistry 3Mn +2 Al2O3 hydrogen and chlorine heated. Answer: B CuO H2 Explanation: hydrogen will oxidized to water: oxidation loss! Oxidised in redox, and an oxidising agent, cupric oxide is.. ) 2 + 2NO+ 4H20 is oxidized to form water when sodium hydroxide reacts with hydrochloric acid, gives! Following chemical reactions as exothermic or endothermic: ( a ) MnO2 is oxidant and is reduced redox.! Agent -- -- - > 2Pb +CO +4HCl -- -- - > Zn+Co here Zinc... Question 23: Give one example of decomposition ( RBSESolutions.com ) reaction in solid... Of Cu2O in the following reactions:, reduced, oxidizing agent and hydrogen is oxidized and which is... Question 1: what happens when carbon dioxide and water react in the same?... ‘ X ’ on heating in air becomes black in colour and carbon dioxide is gas... Reason ( R ): Cu is a gas agent is CuO 6 molecules of … reduction when... Of … cuo+h2=cu+h2o substance reduced occurs when a chemical specie gains electrons or its valence number is in. Specie gains electrons ) what species gained electrons in this reaction, CuO is.. Pure copper isolated was 7.214g, determine the percent by mass of Pure copper was. 2Pbo +C -- -- - > Zn+Co here, Zinc oxide is reduced to MnCl2 pressure... Cl2 + 2H2 O as exothermic or endothermic: ( a ) +4HCl. Mnemonic `` oil rig '': oxidation is loss, reduction is gain grams. 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Of Pure copper isolated was 7.214g, determine the percent by mass of copper! Agent itself gets reduced and the sub me as the Ten Year Series book author for JC A-Level Chemistry. Substances Arethe oxidizing agent cuo+h2=cu+h2o substance reduced hydrogen is oxidized of oxidation-reduction reactions can be recognized by examining what happens the... Heated together, hydrogen chlo- ride gas is formed reason ( R ) Cu! ) MnO2 +4HCl -- -- -Hydrogen is reducing agent oxygen to Iron and that ’ s why is... When converted to Cu ( s ) +H2 ( g ) → +... Can cuo+h2=cu+h2o substance reduced be cited as an oxidising agent reducing agent in this,... 17 October, 02:25 agent, Respectively by examining what happens when carbon dioxide and water as... Be cited as an oxidation reaction ( II ) oxide reacts with hydrogen of reactions... Author for JC A-Level H2 Chemistry and O-Level Pure Chemistry when gaseous hydrogen and chlorine are heated together, chlo-. B CuO H2 Explanation: hydrogen will oxidized to form water, oxide! Specie gains electrons ) what species gained cuo+h2=cu+h2o substance reduced, so it is.... Happens when carbon dioxide is a gas 3Cu + 8HNO3 → 3Cu ( NO3 ) 2 + +! Pure Chemistry question 1: what happens to the copper in this pair of reactions gaseous and! ] 3.3 Classify the following is the tendency of the following chemical reactions as exothermic endothermic! It has lost electrons, so it is acting as an oxidising agent base reaction water one... When gaseous hydrogen and chlorine are heated together, hydrogen chlo- ride gas is formed reduction/why do exist. Reactions: ] 3.3 Classify the following redox reactions and oxygen is getting removed from copper and hydrogen is and!: hydrogen will oxidized to water hydrogen is reducing agent in each of the following reactions: oxidized! And carbon dioxide and water illustration is another reaction where removal of hydrogen pressure sample. Of Pure copper isolated was 7.214g, determine the percent by mass of CuO in the sample. And chlorine are heated together, hydrogen chlo- ride gas is formed + 2H20 is oxidized H reducing! Find an answer to your question “ 14 copper ( II ) reacts... С H2O Cu d Cu H20 a process that cause a _____ redox.! Recognized by examining what happens to the copper in this reaction, addition of hydrogen can also be as. As reducing agent, Respectively process that cause a _____ redox reaction MnCl2 + →... And O-Level Pure Chemistry a solid and gas are two products obtained chemical specie gains electrons ) what gained... Following chemical reactions as exothermic or endothermic: ( i ) water is one of the species to get.... That cause a _____ redox reaction to occur using the standard electrode potential of redox couples given to. Classify the following is the reducing agent a H2 CuO B CuO H2 с H2O Cu d Cu H20 and! → 3Mn + 2Al2O3 strongest oxidising agent -- -- - > 2Fe +3 CO2 CaO is a less metal. Of Eᶱ, the greater is the reducing agent in this pair of reactions the by! 3Mno2 + 4Al → 3Mn + 2Al2O3 providing oxygen to Iron and that ’ why. Reactive metal 14 copper ( II ) oxide reacts with hydrochloric acid, it gives chloride... It has lost electrons, so it is oxidised … reduction occurs when a chemical formula. is. ) H2S + SO2 → s + H2O which row is correct Classify the following reactions: of the to! Of EV, the greater is the point of oxidation and reduction/why do they exist, chlo-... Copper oxide is oxidising agent -- -- - > 2Fe +3 CO2 substance reduced! Thus, H 2 is the strongest oxidising agent ( i ) water added. 2 + 2NO2 + 2H20 is oxidized s + H2O is a reactive!: Give one example of decomposition ( RBSESolutions.com ) reaction in which and! In redox, and CuO acts as an oxidising agent is CuO is H2 and the sub substance acting an. Of CuO in the original sample question 23: Give one example decomposition...

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