Which of the following aqueous solutions should demonstrate the most non-ideal behavior? A. 0.1 M NaI B. 0.2 M CuSO4 C. 0.5 M KBr D. 2.0 M CuCl2 E. 2.5 M CsCl

D. 2.0 M CuCl2

Explanation:

The ionic strength of a solution shows the concentration of its ions in that given solution of the compound. Dissolved ionic compounds always dissociate into ions. The total amount of ions in solution will definitely affect the properties of the solution. The concept of ionic strength was first introduced by Lewis and Randall in 1921 while describing the activity coefficients of strong electrolytes.

The ionic strength of CuCl2 is 6M as shown:

ionic strength = 0.5*[(+2)^2*2M + (1-)^2*4M] = 6 M

The higher the ionic strength of a solution, the greater its non ideal behavior.

CuCl2 shows the greatest ionic strength hence the greatest non ideal behavior.

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.