NaOH(aq) C) (b) The effect of the solvent Category No lons Few lons Many lons 1-

Question

NaOH(aq) C) (b) The effect of the solvent Category No lons Few lons Many lons 1-non- 2X Toluene, cata- HCI (in toluene) or CH,COOH in toluene) Aqueous layer after mixing with HCI (in toluene) for CH,COOH in toluene) Why is the conductivity of HCI (or CH,COOt) different in the two solvents? What causes this difference? (c) Correlating chemical and conductivity behavior (1) compare the rates of reaction of Caco,s) with 6 M acetic acid and 6 M hydrochloric acid. The reaction of CaCO, with an acid, HA, is 2 HAlaq) + Cacods) Ca2. (aq) + 2 A-(aq) + CO|g) + H200) (ii) Compare the rates of reaction of 2nis) with 6 M CH,COOH and 6 M HCL. The reaction of zinc with an acid, HA, is (iil) Is there a correlation between the rates of the chemical reactions of 6 M CH,COOH and 6 M HCl and the conductivities observed for CH,COOHaq) and HCaq) in part I(a)? Suggest an explanation. 18-9

Explanation / Answer

i)

the rate of [HCl] = 6 M is faster than [acetic acid] = 6M

this is mainly beacaus eof the 100% dissociation of the HCl vs. 5% dissociation of the acetic acid

there is more partilce spresent, therefore faster

ii)

simliar as above

in this specific case, H+ from Hcl is much better, since the formation of H2(g) will be present readily

iii)

Yes, the more ionic the acid, the more H+, therefore, the faster rates. This will hav eth ehighest conductivity, which implies lots of ions, as stated before

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