in this reaction the reducing agent is h2 and the oxidising agent is cuo . (gains electrons) What species gained electrons in this equation? Question 1: What happens when carbon dioxide and water react in the same ratio? … B. Cu. c. Cu + 4HNO3 → Cu(NO3)2 + 2NO2 + 2H20 is oxidized. Many know me as the Ten Year Series book author for JC A-Level H2 Chemistry and O-Level Pure Chemistry. CuO(s) + H2(g) → Cu(s) + H2O (l) CuO+H2-----Cu+H2O. 0 5. Are all chemical reactions oxidation reduction reactions? The substance losing electrons is being oxidized and the one gaining electrons is being reduced. Answer. which is reduced is the oxidising agent. Oxidizing. 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. a) MnO2 is oxidant and is reduced to MnCl2. No. 9. is reduced. 2. False. C. H20. After the reaction, the valency of copper is 0, the valency of hydrogen is + 1 and the valency of oxygen remains - 2. Chemical Reaction and Catalyst Short Answer Type Questions. B. Cu, but it's the Cu in CuO, not Cu(s) 5 0. How are charges written vs oxidation #s? Cupric oxide is oxidizing agent and hydrogen is reducing agent. is reduced. It has lost electrons, so it is oxidised. In this reaction, oxygen is removed from copper and oxygen is added to hydrogen. 2A1+ 3Cl2 + 2AlCl3 is oxidized. (Express your answer as a chemical formula.) Effect of hydrogen pressure and sample's density on combustion parameters. In an acid base reaction water is one of the end products. What substance has it been reduced to? A mixture of Cu2 and CuO of mass 8.828g is reduced to copper metal with hydrogen: Cu2O + H2 --> 2Cu + H2O. Solution for CuO + H2 ⇌ Cu + H2O CO2 + H2 ⇌ 2CO + H2O H2 + F2 ⇌ 2 HF Fe + O2 ⇌ Fe2O3 NaOH + HCl NaCl + H2O A shiny brown-coloured element ‘X’ on heating in air becomes black in colour. If the mass of pure copper isolated was 7.214g, determine the percent by mass of CuO in the original sample. 0 0. Fe2O3+3Mg=2Fe+3MgO. 2 Answers. In the course of this reaction, CuO is reduced to copper metal. d) 2PbO +C -----> 2Pb +CO. 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) 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 (ii) 3MnO2 + 4Al → 3Mn + 2Al2O3. In this reaction, sodium … Click hereto get an answer to your question ️ Identify the substances that are oxidized and the substances that are reduced in the following reactions. 3.2. Answer: When 6 molecules of … 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. Using the standard electrode potential of redox couples given below to find out which of the following is the strongest oxidising agent. Oxygen is getting removed from water (H2O) hence it is getting reduced. 4. It has gained electrons, so it is reduced. 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 Ans:- True or False: The corrosion of iron requires … Which of the following are exothermic processes? Answer: CaCO 3 → CaO + CO 2 CaO is a solid and carbon dioxide is a gas. b. CuO+H2 → Cu +H2O is oxidized. State which substance is reduced. CuO + H2 → Cu + H2O Which row is correct? Join Yahoo Answers and get 100 points today. Get your answers by asking now. from a substance. Answer Save. It was reduced. The removal of O from a substance (CuO + H2 => Cu + H2O). 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 . d. 3Cu + 8HNO3 → 3Cu(NO3)2 + 2NO+ 4H20 is oxidized. Identify the oxidizing and reducing agent in each reaction below. … which is oxidised is the reducing agent and the sub. asked Jun 8, 2018 in Chemistry by rubby ( 51.7k points) It is the reducing agent. Charges are written w/ sign placed after # (2+) & oxidation #s are written so that sign of # = placed before # (+2). • • • • • • • 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. 9 years ago. Give a reason for your answer. naresh v. Lv 6. Consider The Reaction CuO(s) +H2(g) >> Cu(s) +H2O(l). Simonizer1218. H2 .. it went form an O.S of 0 to +1. The oxidizing agent is reduced. Remember the mnemonic "oil rig": oxidation is loss, reduction is gain. non-spontaneous. Q9 Name the substance oxidized, reduced, oxidizing agent and reducing agent in the following reactions :? is reduced. CuO+H2----->Cu+H2O. None Of These Choices Is Correct. The substance reduced is the _____ agent. Which substance is reduced in this reaction? CuO(s) + H2(g) → Cu(s) + H2O(l)? [CBSE 2013] 3.3 Classify the following chemical reactions as exothermic or endothermic: (i) Water is added to quick lime. 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. Here, Copper Oxide is reduced to become Copper. +2 to 0. The more positive the value of EV, the greater is the tendency of the species to get reduced. cuo is reduced to cu . a. 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. When sodium hydroxide reacts with hydrochloric acid, it gives sodium chloride and water. Cu goes from ON. 0. Fe2O3. Find an answer to your question “14 Copper (II) oxide reacts with hydrogen. (iii) H2S + SO2 → S + H2O. Answer: B CuO H2 Explanation: hydrogen will oxidized to form water. A. H2. CuO And CuD. Thus, H 2 is the reducing agent in this reaction, and CuO acts as an oxidizing agent. Source(s): https ... (+2)(-2)..(0) -->(0)..(+1)(-2) Oxidizing agent = a substance that gains electrons in a redox chemical reaction. Electrolysis is a process that cause a _____ redox reaction to occur. Assertion: (A) CuO + H2 → Cu + H2O is a redox reaction . Answers (1) Nidawi 17 October, 02:25. Comment; Complaint; Link; Know the Answer? Water is providing oxygen to Iron and that’s why it is acting as an Oxidising Agent. (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. 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. Identify which substance is oxidized and which substance is reduced in each of the following redox reactions. Question 23: Give one example of decomposition (RBSESolutions.com) reaction in which solid and gas are two products obtained. H20 gained electrons. 6 years ago. One. A. CuO And H2B. 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. HCl is … Answer Save. oxidising agent reducing agent A H2 Cuo B Cuo H2 с H2O Cu D Cu H20. Relevance. (i) CuO + H2 ⎯→ Cu + H2O (ii) FeO + 3CO ⎯→ 2Fe + 3CO23 2 (iii) 2K + F⎯→ 2KF2 (iv) BaCl2 + H2SO4 ⎯→ BaSO4 + 2HCl 2. 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). Cuo H2 Cu H2o. Not Sure About the Answer? 2. Give a reason for your answer. Cu in CuO lost 2 electrons when converted to Cu(s). H2 And CuOC. 2. Relevance. 6 years ago. Which substance is reduced in this redox reaction? h2 to oxidised to form h2o . The mechanism for the reduction of CuO is complex, involving an induction period and the embedding of H into the bulk of the oxide. The following illustration is another reaction where removal of hydrogen can also be cited as an oxidation reaction. What is the point of oxidation and reduction/why do they exist? 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. So, cupric oxide is reduced to copper and hydrogen is oxidized to water. What substance has it been reduced to? CuO + H2→ Cu + H2O (ii) Fe2O3 + 3CO → 2Fe + 3CO2 (iii) 2K + F2→ 2KF (iv) BaCl2 + H2SO4→ BaSO4 + 2HCl Solution: Option (iv) is the answer. Eq. A reducing agent is oxidised in redox, and an oxidising agent is reduced. CuO+H2=Cu+H2O. 4 Answers. 17. Name the element ‘X’ and the black coloured compound formed. Favourite answer. Fe goes from oxidation number 0 to +2. NaOH + HCl → NaCl + H2O. 2. a) MnO2 +4HCl-----> MnCl2 + Cl2 + 2H2 O . When gaseous hydrogen and chlorine are heated together, hydrogen chlo- ride gas is formed. and. H2O And H2E. Reducing agent • A substance that causes reduction in another substance. Using the standard electrode potential of redox couples given below find out which of the following is the strongest oxidising agent. Ask Question + 100. [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 . CuO + H2 Cu + HzO. State which substance is reduced. c) 3MnO2 + 4Al -----> 3Mn +2 Al2O3. Heat ZnO+C----->Zn+Co Here, Zinc Oxide is reduced to become Zinc. CuO was … Reason(R): Cu is a less reactive metal. D. O. Cu2+ is the oxidising agent. CuO + H2 --> Cu + H2O. Lv 7. 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. Here, H = reducing agent & copper(II) oxide =reduced substance. Ray;mond. Let x = grams of CuO in the original sample. is reduced. Copper oxide is oxidising agent-----Hydrogen is reducing agent . always remember the sub. CuO + H2 → Cu + H2O. Reduction occurs when a chemical specie gains electrons or its valence number is reduced. The more positive the value of Eᶱ, the greater is the tendency of the species to get reduced. Which substance is reduced in the reaction? Still have questions? In This Reaction, Which Substances Arethe Oxidizing Agent And Reducing Agent, Respectively? b) Fe2 O3 + CO -----> 2Fe +3 CO2. y = grams of Cu2O in the original sample. The substance which acts as an oxidising agent itself gets reduced and the substance acting as reducing agent itself gets oxidised. An important feature of oxidation-reduction reactions can be recognized by examining what happens to the copper in this pair of reactions. H2 + Cl2 → 2 HCl In this reaction, addition of hydrogen takes place to chlorine. Lv 7. Reason(R): Cu is a less reactive metal. : Give one example of decomposition ( RBSESolutions.com ) reaction in which solid carbon... 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