Question

Rank from most conductive to least conductive. To rank items as equivalent, overlap them.
POTASSIUM BROMINE
SUGAR
BARIUM CHLORIDE
BUTANIOC ACID

Answer 1

Well, I did least to most
Ions are what conduct electricity in solution.
Sugar does not ionize - lousy conductivity
Benzoic is a weak acid, ie it does not ionize much
KCl will dissociate totally into two ions per molecule
AlCl3 will give more ions

Answer 2

MgBr2(s) + ∞H2O → Mg^2+(aq) + 2Br^-(aq) three ions per mol dissolved hence 0.60 mol of ions produced
C6H12O6(s) + ∞H2O → C6H12O6(aq) dissolves by H-bonding interactions and remains undissociated 0 ions produced
Let A = C6H5COO
HA + H2O ⇋ H3O^+ + A^- pKa [1] = 4.202 = 6.28×10^-5
put into Ka
Ka = [H3O^+][A^-]/[HA] = x^2/0.2 = 6.28×10^-5 x = 3.5×10^-3 so #of ions is twice this 7×10^-3
KBr(s) + ∞H2O → K^+(aq) + Br^-(aq) two ions per mol dissolved hence 0.40 mol of ions produced.
Conductivity MgBr2 > KBr > C6H5COOH > C6H12O6

Answer 3

just google this one lol

Answer 4

thanks lol...