(obtained from JT Baker, Center Valley, Pa., US). With moderate agitation, 1500 grams of the heat-treated alumina particles were added slowly to form a uniform slurry. The pH of the resulting mixture was adjusted to a pH of 9 to 10 using 1.0 N NaOH (obtained from VWR, Radnor, Pa....
下列实验现象描述正确的是( ) 选项 实验 现象 A 加热放在坩埚中的小块钠 钠先熔化成光亮的小球,燃烧时火焰为黄色,燃烧后生成淡黄色固体 B 向饱和Na 2CO 3溶液中滴加澄清石灰水 无明显现象 C 在酒精灯上加热铝箔 铝箔熔化,失去光泽,熔化的铝滴落下来 D 向久置于空气中的FeSO 4溶液中滴加NaOH 立刻产生大量...
For examples, a mixed solution of 1.96 g Ce(NO3)3∙ 6H2O in 0.04 L water and 16.88 g NaOH in 0.03 L water hydrothermally treated in a stainless-steel autoclave at 180 and 100°C for 24 h, respectively, leads to the formation of c-CeO2 and r-CeO2 nanocrystals. As-synthesized r...
and the other peak is representative of a second molecular portion within the fiber that is in chain-extended crystalline form and has a melting point elevated over that of the non-chain-extended crystalline form. Webs comprising fibers having such a morphology have a unique combination of durabil...
The relatively higher nickel content and lower melting point of NaOH can effectively reduce the overall calcination temperature. After natural cooling, the product was immediately transferred to a glovebox filled with argon gas for further handling. Materials characterization X-Ray Structural ...