2.2C2H2+5O2点燃2H2O+4CO2 蓝色火焰、放热、黑烟、生成使石灰水变浑浊气体和使无水3.CuSO4变蓝的液体(水) 氧炔焰、焊接切割金属4.2HgOΔ2Hg+O2↑ 红色变为银白、生成使带火星木条复燃的气体 拉瓦锡实验5.NH4HCO3ΔNH3↑+ H2O +CO2↑ 白色固体消失、管壁有液体、使石灰水变浑浊气体 碳酸氢铵长期暴露空气中会...
则发生反应Cl-+ ClO-+ 2H+ = Cl2↑+ H2O而产生氯气;故答案为: PH3 + 4ClO-= H3PO4 + 4Cl-,Cl-+ ClO-+ 2H+ = Cl2↑+ H2O;(2) ①装置D多孔球泡的作用是增大乙炔气体与硝酸的接触面,充分反应;故答案为增大气体和溶液的接触面积,加快反应速率,使反应充分进行;②根据装置图,D中Hg(NO3)2作催化...
b = 4 (H2O) c = 3 (CO2) d = 5 (CH2CHCO2H) Step 4: Substitute Coefficients and Verify Result Count the number of atoms of each element on each side of the equation and verify that all elements and electrons (if there are charges/ions) are balanced. ...
In the following reaction : C2H2 underset(HgSO4//H2SO4)overset(H2O)t... 01:17 Identify the reagents in the following transformations : 02:12 The reagents to carry out the following conversion are 01:08 In the reaction H-C-=CH underset((2)CH3CH2Br)overset((1)NaNH2//liq.N... 01:...
2HgOΔ2Hg+O2↑ 红色变为银白、生成使带火星木条复燃的气体 拉瓦锡实验2H2O通电2H2↑+O2↑ 水通电分解为氢气和氧气 电解水Cu2(OH)2CO3Δ2CuO+H2O+CO2↑ 绿色变黑色、试管壁有液体、使石灰水变浑浊气体 铜绿加热NH4HCO3ΔNH3↑+ H2O +CO2↑ 白色固体消失、管壁有液体、使石灰水变浑浊气体 碳酸氢铵长期...
1配平下列反应的化学方程式(1)Fe2O3+HCl═FeCl3+H2O(2)C2H2+O2 点燃 . CO2+H2O(3)FeS2+O2 高温 . Fe2O3+SO2(4)HgO △ . Hg+O2↑(5)CH4+O2 点燃 . CO2+H2O(6)Al+H2SO4═Al2(SO4)3+H2↑ 2配平下列反应的化学方程式(1)Fe2O3+HCl═FeCl3+H2O(2)C2H2+O2点燃.CO2+H2O(3)FeS2+O2高温....
某实验小组用(NH4)2Fe(SO4)2·6H2O为原料制备三草酸合铁酸钾的步骤如下:①称取5g(NH4)2Fe(SO4)2·6H2O固体,溶解,加硫酸酸化,搅拌下加入25mL1mol·L-1H2C2O4溶液,静置,析出黄色的FeC2O4·2H2O沉淀,过滤并洗涤沉淀2~3次。②将上述FeC2O4·2H2O沉淀溶解在10mL饱和草酸钾溶液中,再加入20mL饱和H2C2O4溶液,...
配平下列反应的化学方程式(1)Fe2O3+HCl═FeCl3+H2O(2)C2H2+O2 点燃 . CO2+H2O(3)FeS2+O2 高温 . Fe2O3+SO2(4)HgO △ . Hg+O2↑(5)CH4+O2 点燃 . CO2+H2O(6)Al+H2SO4═Al2(SO4)3+H2↑
例子 (Hg)2O C3H6OCO2 (Cr(OH))SO4 B2BaO4 (CaO)2SiO2 (PH)3 Fe((H2O)6)Cl3 (CuSO4)(5H2O) HoCl3 Cl2(O) Na2CrO4*4H2O (CI2)2 Recent Oxidation Numbers
How many moles of H2O2 are needed to produce 2.40 mol of H2O? Express your answer with the appropriate units. According to the following reaction, how many moles of mercury will be formed upon the complete reaction of 23.2 grams of mercury(II) oxide? 2HgO(s) \to 2Hg(l) + ...