I know to find the concentration you do moles solute over vol liters and I can u

Question

I know to find the concentration you do moles solute over vol liters and I can use a random volume amount (10L) to solve however I'm stumped on the change in mM, to micro M, to M of the different compounds why does e in micro M have the highest concentration of ions in solution please solve and explain. 2. Based on solubility and other factors which of the following compounds would have the highes concentration of ions in solution, and hence be the best conductor of electricity? ru a. 0.200 mM potassium phosphate ub. 1.20x10 M ethanol (CH3CH3OH) c. 0.300 mM lead (II) acetate a3s d. 0.350 mM barium hydroxide .cos 5e. 525 uM nitric acid

Explanation / Answer

concentration = Molarity x no of ions

a) K3PO4 ----------> 3K+ + PO43-

4 ions

Hence,

concentration = 0.2 mM x 4 = 0.8 mM

b) Ethanol = 1 species

concentration = 1.2 x 10-3 M x 1 = 1.2 mM

c) (CH3COO)2Pb -------> 2 CH3COO- + Pb2+

   3 ions

concentration = 0.3 mM x 3 = 0.9 mM

d) Ba(OH)2 -----------> Ba2+ + 2OH-

3 ions

concentration = 0.35 mM x 3 = 1.05 mM

e) HNO3 -------> H+ + NO3-

2 ions

  concentration = 525 M x 2 = 0.525 mM x 2 = 1.05 mM

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Since HNO3 is a strong acid and completely dissocaite into ions, 525 M HNO3 has the highest concentration of ions and hence be the best conductor of electricity.

Therefore,

ans = e

  

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