下列溶液中微粒的物质的量浓度关系正确的是( ) A.室温下,向0.1 mol•L-1NH4HSO4溶液中滴加等物质的量溶质的NaOH溶液:[Na+]=[SO 2-4 ]>[NH +4 ]>[OH-]=[H+] B.0.1 mol•L-1NaHCO3溶液:[Na+]>[OH-]>[HCO -3 ]>[H+] C.Na2CO3溶液:[OH-]-[H+]=[HCO -3 ]+2[H2CO3] D.25℃...
For instance, heating a mixture of NaOH and α-Fe2O3 at 200 ◦C yields α-NaFeO2, while α-Fe2O3 and Na2CO3 used as starting components result in β-NaFeO2, even if the synthesis is below 760 ◦C [37]. The α-form of sodium ferrite is obtained through sintering the mixture...
The results indicated that Nd and Ce could be fixed in glass structures, and the ultimate solid solubility of Nd and Ce reached 15 and 5 wt.%, respectively, with 20 wt.% Na2CO3added. These samples were sintered at 1200°C for 40 min, and the solidified samples exhibited homogeneous ...