Laboratory Ionization & Classification of Acids, Bases and Salts DATE INSTRUCTOR

Question

Laboratory Ionization & Classification of Acids, Bases and Salts DATE INSTRUCTOR: SECTION Complete the table for each ofthe substances tested by the instructor. Mark "SE" for strong electrolyte, "WE" for weak electrolyte and "NE" for non-electrolyte. PART A Observations (Intensity of Type of Particles Substance light) & Type of Electrolyte ons, Molecules, both (SE, WWE, NE) Distilled H2O Tap Ho 0.5 M C12H220,1 0.2 M KCI Concentrated acetic acid 0.2 M aceitc acid 0.1 M HCl 0.2 M NH,OH 0.1 M KOH 0.1 M NaNO, 0.1 M MgCl, 0.1 M CuSo, 0.1 M H SO 0.1 M CH OH

Explanation / Answer

Strong electrolytes are salts form acid/base reactions which will dissociate 100%

weak electolytes are either molecular of acid/base neutralization salt which are weak acid/bases

finally, nonelectrolytes are molecular species

a)

H2O is molecular, it is polar, therefore it will NOT conduct electricity, this is NE

b)

tap H2O is actually molecualr, but it contains cations such a sMg+2 and Ca+2, which can accept and conduct electrons, so this is a weak electrolyte

c)

This is a molecular species, It is a sugar

it is not able to accept/conduct electrons, so it is a NE

d)

acetic acid is molecular, since it is a carboxilic acid

concentrated acid will be able to conduct electricity due to the ionization of the acetate + proton, but to a lower extetn so this is a WE (weak electrolye)

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