Question

10 Which is a nonelectrolyte? a harium nitrate, Ba(NO) bcalcium chloride, CaCl2 c sodium chloride, NaCl d.methyl alcohol, CHOH e potassium sulfate, KSO 11 What is the name of the oxoacid: HCIO? a Chloric acid b. Hypochlorous acid c. Hydrochloric acid d. Chlorous acid c. Perchloric acid 12 Which statement is true concerning an oxidation-reduction reaction? a. The reactant which is reduced is the reducing reagent. b. The reactant which is oxidized is the reducing reagent. c. The reactant which gains electrons is the reducing reagent. d. The reactant which loses electrons is the oxidizing reagent. e. None of the statements, a-d. is true. 13 What is the percent, by mass, of boron in Al(BF 4):? Use a periodic table to find the atomie masses. a. 9.501 % b. 9.385 % c. 10.152 % d. 11.285 % e. 23.713 %

Answer 1

10) Methyl alcohol is non electrolyte, because it is a covalent compound, which cannot dissociate into ions.

11) Name of HClO, is Hypo chlorous acid.

12) b.

The reactant which is oxidizes is the reducing agent.

Reducing agent: It is the substance, that loses electrons, and reduces other substance by donating electrons, but itself it get oxidized.

13)

Atomic masses of:

Al = 27,. B=10.81, . F = 19.

Al(BF_{​​​​​4})₃ = (27)+(3 X 10.81)+(12 X 19)

= 287.43 g/mol.

Molecular mass of Al(BF_{​​​​​4})₃ is 287.43 g/mol.

% by mass of Boron = mass of Boron X 100 / Total mass of compound.

% of Boron =32.43 X 100 / 287.43

= 11.285%.