earlite is a kind of ( ). A: Metal compound B: Solid solution C: Mechanical mixture D: Chemical compound

Increasing ionic strength would compress the electric double layer and increase the stability of the colloid。 （ ）

Let A be a [img=41x19]1803c4e38325ee9.png[/img] matrix, then ________. A: If Ax=0 has only trivial solution, then Ax=b must have a unique solution. B: If Ax=0 has a nontrivial solution, then Ax=b must have infinitely many solutions. C: If Ax=b has a unique solution, then Ax=0 must have a unique solution. D: If Ax=0 has a nontrivial solution, then [img=55x23]1803c4e38c0c9df.png[/img] must have a nontrivial solution.

Calculate the ionic strength I of a 0.010 mol/kg CuSO4 aqueous solution and its mean ionic activity coefficient g± at 298 K. (Hint: Using Debye-Huckel limiting law, [img=200x28]17de87ec0165e4e.png[/img]when lgg± is used.) A: 0.04 mol/kg，0.392 B: 0.04 mol/kg，0.470 C: 0.03 mol/kg，0.470 D: 0.03 mol/kg，0.392

在采用FactSage®热力学软件绘制三元相图过程中，关于产物数据的选择正确的是。（ ） A: 不用选择Compound species和Solution species B: Compound species和Solution species都选 C: 仅选用Compound species数据即可 D: 仅选用Solution species数据即可