The crystal structure of synthetic (NH4)2[B4O5(OH)4] · 2 H2O was determined from single-crystal X-ray diffractometer data. The compound is monoclinic, space groupP21=C22h; the lattice constants area= 10.691(2),b= 10.646(3) ,c= 7.223(3),β= 139.4(3)°; the unit cell contains ...
You can also ask for help determining oxidation numbers in our chat or forums. 例子 AlNa(SO4)2 MnO(OH2) (HO)2 C4H5NH2 (Mg3)N2 Zn(Cl)2 K2(B4O7) MnO2(OH)2 Cr(OH)3*3H2O (Fe(OH2)6)Cl3 C2OOH2 Zn(H2PO4)2 Recent Oxidation Numbers...
Composition ofDittmarite- (NH4)MgPO4·H2O ElementSymbolAtomic Mass# of AtomsMass Percent NitrogenN14.0067 g/mol19.0174% HydrogenH6.0476 g/mol63.8934% MagnesiumMg24.305 g/mol115.6473% PhosphorusP30.9738 g/mol119.9406% OxygenO79.997 g/mol551.5013% ...
Infrared and Raman spectra (4000400 cm1) of NH4[Co(NH3)5(H2O)][B4O5(OH)4]2路6H2O were recorded at room temperature and analyzed. Fundamental vibrational modes were identified and band assignments were made. The middle band observed at 575 cm1 in Raman spectrum is the pulse vibration of ...
Thermodynamic Modeling of Boron Species in the Ternary System Na2O-B2O3-H2O at 298.15K The solubilities; concentration of four boron species B(OH)3, B(OH)4, B3O3(OH)4, and B4O5(OH)42; and H+ (OH–) in the system Na2O–B2O3–H2O were calculate... Q Fu,L Chen,X Song,... ...
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铵盐是比较重要的盐类物质,请回答下列问题。(1)草酸是二元弱酸,能形成两种铵盐。①(NH4)2C2O4溶液呈酸性,溶液中各离子浓度由大到小的顺序为___
分)(3)减少产品的损失(或“减少晶体的溶解”或“明矾在酒精中的溶解度小”等)(2分)Ⅱ.(1)(NH4)2B4O7 + 2HCl + 5H2O = 4 H3BO3 + 2NH4Cl (2分)(2)圆底烧瓶 (2分) 防止装置中压力过大而发生危险;防止冷却时发生倒吸(2分)(3)消除其他试剂、实验操作等因素引起的误差 (2分) (4) 4.480 (2分...
(NH4)2B4O7,则烧杯中发生反应的化学方程式为2NH3+4H3BO3=(NH4)2B4O7+5H2O;④反应装置使用了双层玻璃,可以起到保温的作用,减少热量散失,有利于氨气逸出;⑤检验蒸馏操作中氨已完全蒸出的方法是撤去冷凝管末端的烧杯,将湿润的红色石蕊试纸靠近冷凝管下端出口,若试纸不变蓝,或用pH试纸检验馏出液为中性,说明氨气...