화학량론을 이용해 화학 반응을 계산하세요. 제한 물질 계산하기. 화학 방정식 (Co (OH)2 + LiOH = LiCoO2 + H2 + O2) 균형 방정식 . 원소의 첫 번째 글자는 대문자를 두 번째 글자는 소문자를 사용하시기 바랍니다. 예: Fe, Au, Co, Br, C, O, N, F. 이온 전하는 지원하지 않으므로 Be(OH) 2: B(OH) 3 2) 2: C(OH) 4: NH 4 •OH NMe 4 OH: O(OH) 2: FOH: Ne NaOH NaOD: Mg(OH) 2: AlOH Al(OH) 3: Si(OH) 4: P(OH) 3: S(OH) 2: ClOH: Ar KOH: Ca(OH) 2: Sc(OH) 3: Ti(OH) 4: V Cr(OH) 2 Cr(OH) 3: Mn(OH) 2: Fe(OH) 2 Fe(OH) 3: Co(OH) 2 Co(OH) 3: Ni(OH) 2 NiO(OH) CuOH Cu(OH) 2: Zn(OH) 2: Ga(OH) 3: Ge(OH) 2: As(OH) 3: Se BrOH: Kr RbOH: Sr(OH) 2 Product side: 1 Ca, 5/2 O 2, 2 C (graphite), 1 CaO, 1 CO 2, 1 Ca(OH) 2 So it looks like to cancel out the O 2 , graphite, and CO 2 , we need to times one of the reactions by two. Looking back at the all the reactions, C (graphite) + O 2 → CO2, fits the bill. Here, we report one single atom W6+ doped Ni(OH)2 nanosheet sample (w-Ni(OH)2) with an outstanding oxygen evolution reaction (OER) performance that is, in a 1 M KOH medium, an overpotential of 237 4 co(oh) 2 + 24 nh 4 oh + o 2 → 4 (co(nh 3) 6)(oh) 3 + 22 h 2 o Warning: Some of the compounds in the equation are unrecognized. Verify it is entered correctly. 2 Co(OH) 2 + Zn(OH) 2 + -1 O 2 → ZnCo 2 O 4 + 3 H 2 Warning: Negative coefficients mean that you should move the corresponding compounds to the opposite side of the reaction. Warning: Some of the compounds in the equation are unrecognized. . Computing molar mass (molar weight)To calculate molar mass of a chemical compound enter its formula and click 'Compute'. In chemical formula you may use: Any chemical element. Capitalize the first letter in chemical symbol and use lower case for the remaining letters: Ca, Fe, Mg, Mn, S, O, H, C, N, Na, K, Cl, Al. Functional groups: D, Ph, Me, Et, Bu, AcAc, For, Ts, Tos, Bz, TMS, tBu, Bzl, Bn, Dmg parantesis () or brackets []. Common compound names. Examples of molar mass computations: NaCl, Ca(OH)2, K4[Fe(CN)6], CuSO4*5H2O, water, nitric acid, potassium permanganate, ethanol, fructose. Molar mass calculator also displays common compound name, Hill formula, elemental composition, mass percent composition, atomic percent compositions and allows to convert from weight to number of moles and vice versa. Computing molecular weight (molecular mass) To calculate molecular weight of a chemical compound enter it's formula, specify its isotope mass number after each element in square brackets. Examples of molecular weight computations: C[14]O[16]2, S[34]O[16]2. Definitions of molecular mass, molecular weight, molar mass and molar weight Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12) Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol. Weights of atoms and isotopes are from NIST article. Related: Molecular weights of amino acids Enter a chemical equation to balance: Balanced equation: H2O2 + 2 Co(OH)2 = 2 Co(OH)3 Reaction type: synthesisReaction stoichiometryLimiting reagentCompoundCoefficientMolar Co(OH) Co(OH) Units: molar mass - g/mol, weight - tell about this free chemistry software to your friends!Direct link to this balanced equation: Instructions on balancing chemical equations:Enter an equation of a chemical reaction and click 'Balance'. The answer will appear belowAlways use the upper case for the first character in the element name and the lower case for the second character. Examples: Fe, Au, Co, Br, C, O, N, F. Compare: Co - cobalt and CO - carbon monoxide To enter an electron into a chemical equation use {-} or e To enter an ion, specify charge after the compound in curly brackets: {+3} or {3+} or {3}. Example: Fe{3+} + I{-} = Fe{2+} + I2 Substitute immutable groups in chemical compounds to avoid ambiguity. For instance equation C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but PhC2H5 + O2 = PhOH + CO2 + H2O will Compound states [like (s) (aq) or (g)] are not required. If you do not know what products are, enter reagents only and click 'Balance'. In many cases a complete equation will be suggested. Reaction stoichiometry could be computed for a balanced equation. Enter either the number of moles or weight for one of the compounds to compute the rest. Limiting reagent can be computed for a balanced equation by entering the number of moles or weight for all reagents. The limiting reagent row will be highlighted in pink. Examples of complete chemical equations to balance: Fe + Cl2 = FeCl3KMnO4 + HCl = KCl + MnCl2 + H2O + Cl2K4Fe(CN)6 + H2SO4 + H2O = K2SO4 + FeSO4 + (NH4)2SO4 + COC6H5COOH + O2 = CO2 + H2OK4Fe(CN)6 + KMnO4 + H2SO4 = KHSO4 + Fe2(SO4)3 + MnSO4 + HNO3 + CO2 + H2OCr2O7{-2} + H{+} + {-} = Cr{+3} + H2OS{-2} + I2 = I{-} + SPhCH3 + KMnO4 + H2SO4 = PhCOOH + K2SO4 + MnSO4 + H2OCuSO4*5H2O = CuSO4 + H2Ocalcium hydroxide + carbon dioxide = calcium carbonate + watersulfur + ozone = sulfur dioxide Examples of the chemical equations reagents (a complete equation will be suggested): H2SO4 + K4Fe(CN)6 + KMnO4Ca(OH)2 + H3PO4Na2S2O3 + I2C8H18 + O2hydrogen + oxygenpropane + oxygen Related chemical tools: Molar mass calculator pH solver chemical equations balanced today Please let us know how we can improve this web app. Abstract: Electrochemical water splitting is a clean technology that can store the intermittent renewable wind and solar energy in H2 fuels. However, large-scale H2 production is greatly hindered by the sluggish oxygen evolution reaction (OER) kinetics at the anode of a water electrolyzer. Although many OER electrocatalysts have been developed to negotiate this difficult reaction, substantial progresses in the design of cheap, robust, and efficient catalysts are still required and have been considered a huge challenge. Herein, we report the simple synthesis and use of α-Ni(OH)2 nanocrystals as a remarkably active and stable OER catalyst in alkaline media. We found the highly nanostructured α-Ni(OH)2 catalyst afforded a current density of 10 mA cm(-2) at a small overpotential of a mere V and a small Tafel slope of ~42 mV/decade, comparing favorably with the state-of-the-art RuO2 catalyst. This α-Ni(OH)2 catalyst also presents outstanding durability under harsh OER cycling conditions, and its stability is much better than that of RuO2. Additionally, by comparing the performance of α-Ni(OH)2 with two kinds of β-Ni(OH)2, all synthesized in the same system, we experimentally demonstrate that α-Ni(OH)2 effects more efficient OER catalysis. These results suggest the possibility for the development of effective and robust OER electrocatalysts by using cheap and easily prepared α-Ni(OH)2 to replace the expensive commercial catalysts such as RuO2 or IrO2....read moreAbstract: Ni-(oxy)hydroxide-based materials are promising earth-abundant catalysts for electrochemical water oxidation in basic media. Recent findings demonstrate that incorporation of trace Fe impurities from commonly used KOH electrolytes significantly improves oxygen evolution reaction (OER) activity over NiOOH electrocatalysts. Because nearly all previous studies detailing structural differences between α-Ni(OH)2/γ-NiOOH and β-Ni(OH)2/β-NiOOH were completed in unpurified electrolytes, it is unclear whether these structural changes are unique to the aging phase transition in the Ni-(oxy)hydroxide matrix or if they arise fully or in part from inadvertent Fe incorporation. Here, we report an investigation of the effects of Fe incorporation on structure–activity relationships in Ni-(oxy)hydroxide. Electrochemical, in situ Raman, X-ray photoelectron spectroscopy, and electrochemical quartz crystal microbalance measurements were employed to investigate Ni(OH)2 thin films aged in Fe-free and unpurified (reagent-grade)......read moreAbstract: Prussian blue, which typically has a three-dimensional network of zeolitic feature, draw much attention in recent years. Besides their applications in electrochemical sensors and electrocatalysis, photocatalysis, and electrochromism, Prussian blue and its derivatives are receiving increasing research interest in the field of electrochemical energy storage due to their simple synthetic procedure, high theoretical specific capacity, non-toxic nature as well as low price. In this review, we give a general summary and evaluation of the recent advances in the study of Prussian blue and its derivatives for batteries and supercapacitors, including synthesis, micro/nano-structures and electrochemical properties....read moreAbstract: Oxygen evolution reaction (OER) is an essential electrochemical reaction in water-splitting and rechargeable-metal-air-batteries to achieve clean energy production and efficient energy-storage. At first, this review discusses about the mechanism for OER, where an oxygen molecule is produced with the involvement of four electrons and OER intermediates but the reaction pathway is influenced by the pH. Then, this review summarizes the brief discussion on theoretical calculations, and those suggest the suitability of NiFe based catalysts for achieving optimal adsorption for OER intermediates by tuning the electronic structure to enhance the OER activity. Later, we review the recent advancement in terms of synthetic methodologies, chemical properties, density functional theory (DFT) calculations, and catalytic performances of several nanostructured NiFe-based OER electrocatalysts, and those include layered double hydroxide (LDH), cation/anion/formamide intercalated LDH, teranary LDH/LTH (LTH: Layered-triple-hydroxide), LDH with defects/vacancies, LDH integrated with carbon, hetero atom doped/core-shell structured/heterostructured LDH, oxide/(oxy)hydroxide, alloy/mineral/boride, phosphide/phosphate, chalcogenide (sulfide and selenide), nitride, graphene/graphite/carbon-nano-tube containing NiFe based electrocatalysts, NiFe based carbonaceous materials, and NiFe-metal-organic-framework (MOF) based electrocatalysts. Finally, this review summarizes the various promising strategies to enhance the OER performance of electrocatalysts, and those include the electrocatalysts to achieve ~1000 mA cm−2 at relatively low overpotential with significantly high stability....read moreAbstract: The active site for electrocatalytic water oxidation on the highly active iron(Fe)-doped β-nickel oxyhydroxide (β-NiOOH) electrocatalyst is hotly debated. Here we characterize the oxygen evolution reaction (OER) activity of an unexplored facet of this material with first-principles quantum mechanics. We show that molecular-like 4-fold-lattice-oxygen-coordinated metal sites on the (1211) surface may very well be the key active sites in the electrocatalysis. The predicted OER overpotential (ηOER) for a Fe-centered pathway is reduced by V relative to a Ni-centered one, consistent with experiments. We further predict unprecedented, near-quantitative lower bounds for the ηOER, of and V for pure and Fe-doped β-NiOOH(1211), respectively. Our hybrid density functional theory calculations favor a heretofore unpredicted pathway involving an iron(IV)-oxo species, Fe4+=O. We posit that an iron(IV)-oxo intermediate that stably forms under a low-coordination environment and the favorable discharge of......read more Li, Zhang, Ding, R. Panneerselvam, Tian, Chem. Rev. 117, 5002 (2017)CAS Article Google Scholar L. Zhou, J. Zhou, W. Lai, X. Yang, J. Meng, L. Su, C. Gu, T. Jiang, Pun, L. Shao, L. Petti, Sun, Z. Jia, Q. Li, J. Han, P. Mormile, Nat. Commun. 11, 1785 (2020)CAS Article Google Scholar S. Schlücker, Angew. Chem. Int. Ed. 53, 4756 (2014)Article Google Scholar Qian, Nie, Chem. Soc. Rev. 37, 912 (2008)CAS Article Google Scholar H. Zhang, Zhang, J. Wei, C. Wang, S. Chen, Sun, Wang, Chen, Yang, Wu, Li, Tian, J. Am. Chem. Soc. 139, 10339 (2017)CAS Article Google Scholar L. Zhang, Miu, J. Yao, L. Sun, B. Yu, Res. Chem. Intermed. 44, 3365 (2018)CAS Article Google Scholar M. Abd El-Aal, T. Seto, Res. Chem. Intermed. 46, 3741 (2020)CAS Article Google Scholar Q. Zhu, S. Jiang, K. Ye, W. Hu, J. Zhang, X. Niu, Y. Lin, S. Chen, L. Song, Q. Zhang, J. Jiang, Y. Luo, Adv. Mater. 32, 2004059 (2020)CAS Article Google Scholar D. Qi, L. Lu, L. Wang, J. Zhang, J. Am. Chem. Soc. 136, 9886 (2014)CAS Article Google Scholar L. Yang, Y. Peng, Y. Yang, J. Liu, Z. Li, Y. Ma, Z. Zhang, Y. Wei, S. Li, Z. Huang, Long, Appl, Nano Mater. 1, 4516 (2018)CAS Google Scholar Y. Wang, W. Ruan, J. Zhang, B. Yang, W. Xu, B. Zhao, Lombardi, J. Raman Spectrosc. 40, 1072 (2009)CAS Article Google Scholar W. Li, R. Zamani, P. Rivera Gil, B. Pelaz, M. Ibáñez, D. Cadavid, A. Shavel, Alvarez-Puebla, Parak, J. Arbiol, A. Cabot, J. Am. Chem. Soc. 135, 7098 (2013)CAS Article Google Scholar Quagliano, J. Am. Chem. Soc. 126, 7393 (2004)CAS Article Google Scholar Chen, Yu, T. Fujita, Chen, Adv. Funct. Mater. 19, 1221 (2009)CAS Article Google Scholar I. Alessandri, Lombardi, Chem. Rev. 116, 14921 (2016)CAS Article Google Scholar S. Cong, Y. Yuan, Z. Chen, J. Hou, M. Yang, Y. Su, Y. Zhang, L. Li, Q. Li, F. Geng, Z. Zhao, Nat. Commun. 6, 7800 (2015)CAS Article Google Scholar X. Wang, L. Guo, Angew. Chem. Int. Ed. 59, 4231 (2020)CAS Article Google Scholar X. Wang, W. Shi, S. Wang, H. Zhao, J. Lin, Z. Yang, M. Chen, L. Guo, J. Am. Chem. Soc. 141, 5856 (2019)CAS Article Google Scholar X. Wang, W. Shi, Z. Jin, W. Huang, J. Lin, G. Ma, S. Li, L. Guo, Angew. Chem. Int. Ed. 56, 9851 (2017)CAS Article Google Scholar J. Lin, W. Hao, Y. Shang, X. Wang, D. Qiu, G. Ma, C. Chen, S. Li, L. Guo, Small 14, 1703274 (2018)Article Google Scholar X. Zheng, H. Guo, Y. Xu, J. Zhang, L. Wang, J. Mater. Chem. C. 8, 13836 (2020)CAS Article Google Scholar M. Yilmaz, E. Babur, M. Ozdemir, Gieseking, Y. Dede, U. Tamer, Schatz, A. Facchetti, H. Usta, G. Demirel, Nat. Mater. 16, 918 (2017)CAS Article Google Scholar Ghopry, Alamri, R. Goul, R. Sakidja, Wu, Adv. Opt. Mater. 7, 1801249 (2019)Article Google Scholar Y. Quan, R. Su, S. Yang, L. Chen, M. Wei, H. Liu, J. Yang, M. Gao, B. Li, J. Hazard. Mater. 412, 125209 (2021)CAS Article Google Scholar S. Xie, K. Lai, C. Gu, T. Jiang, L. Zhou, X. Zheng, X. Shen, J. Han, J. Zhou, Mater. Today Nano. 18, 100179 (2022)CAS Article Google Scholar Q. Zhao, G. Liu, H. Zhang, Y. Li, W. Cai, Adv. Mater. Inter. 5, 1700709 (2018)Article Google Scholar J. Liu, J. Nai, T. You, P. An, J. Zhang, G. Ma, X. Niu, C. Liang, S. Yang, L. Guo, Small 14, 1703514 (2018)Article Google Scholar J. Yu, J. Ran, Energ. Environ. Sci. 4, 1364 (2011)CAS Article Google Scholar H. Dang, X. Dong, Y. Dong, H. Fan, Y. Qiu, Mater. Lett. 138, 56 (2015)CAS Article Google Scholar X. Zhou, J. Jin, X. Zhu, J. Huang, J. Yu, Wong, Wong, J. Mater. Chem. A. 4, 5282 (2016)CAS Article Google Scholar S. Xu, Du, J. Liu, J. Ng, Sun, Int. J. Hydrogen Energ. 36, 6560 (2011)CAS Article Google Scholar J. Yang, H. Liu, Martens, Frost, J. Phys. Chem. C. 114, 111 (2010)CAS Article Google Scholar G. Zhang, S. Zang, X. Wang, ACS Catal. 5, 941 (2015)CAS Article Google Scholar Download references You follow a systematic procedure to balance the equation. Start with the unbalanced equation: #"CH"_3"OH" + "O"_2 → "CO"_2 + "H"_2"O"# A method that often works is first to balance everything other than #"O"# and #"H"#, then balance #"O"#, and finally balance #"H"#. Another useful procedure is to start with what looks like the most complicated formula. The most complicated formula looks like #"CH"_3"OH"#. We put a 1 in front of it to remind ourselves that the number is now fixed. We start with #color(red)(1)"CH"_3"OH" + "O"_2 → "CO"_2 + "H"_2"O"# Balance #"C"#: We have #"1 C"# on the left, so we need #"1 C"# on the right. We put a 1 in front of the #"CO"_2#. #color(red)(1)"CH"_3"OH" + "O"_2 → color(blue)(1)"CO"_2 + "H"_2"O"# Balance #"H"#: We can't balance #"O"# because we have two oxygen-containing molecules without coefficients. ∴ Let's balance #"H"# instead. We have #"4 H"# on the left, so we need #"4 H"# on the right. There are already #"2 H"# atoms on the right. We must put a 2 in front of the #"H"_2"O"#. #color(red)(1)"CH"_3"OH" + "O"_2 → color(blue)(1)"CO"_2 + color(orange)(2)"H"_2"O"# Balance #"O"#: We have fixed #"4 O"# on the right and #"1 O"# on the left. We need #"3 O"# on the left. Uh, oh! Fractions! We start over, this time doubling all the coefficients. #color(red)(2)"CH"_3"OH" + "O"_2 → color(blue)(2)"CO"_2 + color(orange)(4)"H"_2"O"# Now we can balance #"O"# by putting a 3 in front of #"O"_2# #color(red)(2)"CH"_3"OH" + color(purple)(3)"O"_2 → color(blue)(2)"CO"_2 + color(orange)(4)"H"_2"O"# Every formula now has a coefficient. We should have a balanced equation. Let's check. #"Atom" color(white)(m)"lhs"color(white)(m)"rhs"# #color(white)(m)"C"color(white)(mml)2color(white)(mm)2# #color(white)(m)"H"color(white)(mml)8color(white)(mm)8# #color(white)(m)"O"color(white)(mml)8color(white)(mm)8# All atoms balance. The balanced equation is #2"CH"_3"OH" + 3"O"_2 → 2"CO"_2 + 4"H"_2"O"#

co oh 2 o2