Copper reacts with oxygen to form copper oxide. Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, USA, h Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Science, Shanghai 201800, China, f https://chem.libretexts.org/@app/auth/2/login?returnto=https%3A%2F%2Fchem.libretexts.org%2FBookshelves%2FIntroductory_Chemistry%2FMap%253A_Introductory_Chemistry_(Tro)%2F07%253A_Chemical_Reactions%2F7.03%253A_Chemical_Equations, 7.4: How to Write Balanced Chemical Equations, information contact us at info@libretexts.org, status page at https://status.libretexts.org, used to separate multiple reactants or products, yield sign; separates reactants from products, replaces the yield sign for reversible reactions that reach equilibrium, formula written above the arrow is used as a catalyst in the reaction, reactant or product in an aqueous solution (dissolved in water), triangle indicates that the reaction is being heated. The zinc and the copper are solids and the ions are in solution. The copper oxide can then react with the hydrogen gas to form the copper metal and water. oxygen Copper oxide is the only product, and it contains copper and oxygen. $2 \ce{H_2} \left( g \right) + \ce{O_2} \left( g \right) \rightarrow 2 \ce{H_2O} \left( g \right)$. The first reaction converts copper metal into CuO, thereby transforming a reducing agent (Cu) into an oxidizing agent (CuO). 1. the whole article in a third party publication with the exception of reproduction Department of Chemistry, Tsinghua University, Beijing 100084, China An important feature of oxidation-reduction reactions can be recognized by examining what happens to the copper in this pair of reactions. 2. Answer c $$Cu (s) + O_2 (g) \rightarrow CuO (s)$$ Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China, e Copper oxide dissolves in acid, regenerating the copper (II) ion, which once again binds to water.CuO (s) + 2 H 3 O + (aq) + 3 H 2 O (l) --> [Cu(H 2 O) 6] 2+ (aq) Finally, zinc metal reduces the hydrated copper (II) ion back to metallic copper while itself turning being oxidized to zinc (II) ions. Heated copper metal reacts with oxygen to form the black copper oxide. How much easier is that to read? E-mail: d. Water can be separated into hydrogen and oxygen. Our oxidation number went from 0 -> -2 for O. Oxygen is an oxidizer and a reactant in combustion. Reproduced material should be attributed as follows: If the material has been adapted instead of reproduced from the original RSC publication This work could prove useful in designing new types of materials to make reactions more efficient in converting carbon … b. Reactants: propane ($$\ce{C_3H_8}$$) and oxygen ($$\ce{O_2}$$), Product: carbon dioxide ($$\ce{CO_2}$$) and water ($$\ce{H_2O}$$), $\ce{C_3H_8} \left( g \right) + \ce{O_2} \left( g \right) \rightarrow \ce{CO_2} \left( g \right) + \ce{H_2O} \left( l \right) \nonumber$, c. Reactants: hydrogen fluoride and potassium carbonate, Products: potassium fluoride, water, and carbon dioxide, $\ce{HF} \left( g \right) + \ce{K_2CO_3} \left( aq \right) \rightarrow \ce{KF} \left( aq \right) + \ce{H_2O} \left( l \right) + \ce{CO_2} \left( g \right) \nonumber$. This will help you know which symbols go on each side of the arrow and where the $$+$$ signs go. Chemists have a choice of methods for describing a chemical reaction. It should be apparent that the chemical shorthand method is the quickest and clearest method for writing chemical equations. 16 or no. Authors contributing to RSC publications (journal articles, books or book chapters) The black copper oxide that is produced can be restored to original copper color through a reaction with hydrogen. Identify the reactants and products. Herein, we propose an atomic interface strategy to construct a single atom copper … 2. The products are just that—what is produced—or the result of what happens to the reactants when we put them together in the reaction vessel. $\underbrace{\ce{2 SO2(g) + O2(g) }}_{\text{Reactants}} \rightarrow \underbrace{\ce{2SO3(g)}}_{\text{Products}} \nonumber$. Sulfur dioxide and oxygen, $$\ce{SO_2} + \ce{O_2}$$, are reactants and sulfur trioxide, $$\ce{SO_3}$$, is the product. A chemical reaction is the process in which one or more substances are changed into one or more new substances. 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