(NH4)3H(SO4)2的摩尔质量和分子量为{1,数字}。 由Letovicite - (NH4)3H(SO4)2组成 元素标志原子质量原子#质量百分比 氮 N 42.0201 g/mol 3 16.9951% 氫 H 13.1032 g/mol 13 5.2996% 硫 S 64.13 g/mol 2 25.9375% 氧 O 127.9952 g/mol 8 51.7678% Letovicite 元素 质量百分比氧127.995g氧127....
Fe(OH)3 3H ,故B正确; C. 由于溶液中存在大量三价铁离子,向该溶液中滴加几滴KSCN溶液,立刻出现红色,故C错误; D. 向1 L 0.1 mol/L NH4Fe(SO4)2溶液中滴入过量的Ba(OH)2溶液,会生成氢氧化铁沉淀和硫酸钡沉淀,由于氢氧化钡过量,故溶液中的铁离子和硫酸根离子会被完全沉淀,生成沉淀的物质的量为0.3...
22 (NH4)3H(SO4)2 familyFerroelectrics and Related SubstancesNon-OxidesSummary This document is part of Subvolume B 'Non-Oxides' of Volume 16 'Ferroelectrics and Related Substances' of Landolt-Brnstein - Group III Condensed Matter.doi:10.1007/10201721_17K. Gesi...
The second-order phase transition at 265 K in the triammonium hydrogen disulfate compound (NH4)3H(SO4)2 has been observed by X-ray diffractometry. The space group below 265 K is identified to be P2/b. The recorded X-ray diagrams show a doubling of the primitive unit cell. The observed ...
实验室利用甲醛法测定(NH4)2SO4样品中氮的质量分数,其反应原理为:41000 + 6HCHO = 3H++ 6H2O + (CH2)6N4H+然后用NaOH标准溶液
【答案】C【解析】由于Al3+水解生成Al(OH)3胶体,即Al3++3H2OAl(OH)3(胶体)+3H+,Al(OH)3胶体吸附悬浮颗粒使其沉降从而净水,A正确;在NH4Al(SO4)2中Al3+抑制NH4+水解但不如NH4HSO4中H+抑制N水解程度大,B正确;Al3+和NH4+解使溶液显酸性,加入盐酸使c(H+)增大,抑制水解,但酸性增强,C错误;由题意得20...
NH4Al(SO4)2>NH4HSO4。(3)①NH_1Al(SO_1)_2水解,溶液呈酸性,升高温度其水解程度增大,pH减小,符合的曲线为Ⅰ, 因此,本题正确答案是:Ⅰ;NH_1Al(SO_1)_2水解为吸热反应,升高温度促进水解,,溶液酸性增强,pH减小。②NH_1Al(SO_1)_2=2SO42-+ NH4++ Al3+;Al3++3H2O ⇌ Al(OH)3 + 3H+ NH...
The infrared reflectivity and Raman spectra of single crystals of (NH4)3H(SO4)2 have been studied in the temperature range 10-300 K. A three-parameter classical oscillator fit to the reflectivity data has been obtained to determine the o... JP Srivastava,A Kulshreshtha,W Kullmann,... - 《...
故答案为:2Al3++6Cl-+6H2O=3H2↑+2Al(OH)3↓+3Cl2↑; (5)向NH4Fe(SO4)2溶液中滴加Ba(OH)2溶液至铁离子恰好沉淀,此时铵根离子没有参与反应,NH4Fe(SO4)2与Ba(OH)2的物质的量之比为2:3,反应生成硫酸钡沉淀和氢氧化铁沉淀,反应的离子方程式为:2Fe3++3SO42-+3Ba2++6OH-=3BaSO4↓+2Fe(OH)...
故答案为:Al3+水解生成的Al(OH)3具有吸附性,即Al3++3H2O═Al(OH)3+3H+,Al(OH)3吸附悬浮颗粒使其沉降从而净化水;(2)NH4Al(SO4)2与NH4HSO4中的NH4+均发生水解,但是NH4Al(SO4)2中Al3+水解呈酸性抑制NH4+水解,HSO4-电离出H+同样抑制NH4+水解,因为HSO4-电离生成的H+浓度比Al3+水解生成的H+浓度大,...