Which statement is WRONG? a. a weak acid is a weak electrolyte, because it is pa

ID: 876259 • Letter: W

Question

Which statement is WRONG?

a. a weak acid is a weak electrolyte, because it is partially ionized into ions

b. H+ is present as H3O+ in water

c. NH3 is an acid in water, because it produces H+

d. When K2O is dissolved in water, the ions present in the solution are the same as in KOH solution

2. A 0.100 M solution of K2SO4 would contain the same total ion concentration as which of the following?

a. 0.0800 M Na2CO3

b. 0.100 M NaCl

c. 0.0750 M Na3PO4

d. 0.0500 M NaOH

3. Which statement is correct for the following redox reaction?

5NO2- (aq) + 6H+ (aq) + 2MnO4- -> 5NO3- (aq) + 2Mn2+(aq) + 3H2O (l)

a. H+ was reduced during the reaction

b. The oxidation number of N in NO2- did not change during the reaction

c. MnO4- was used as an oxidizing agent

d. the oxidation number of O in MnO4- was increased during the reaction

1. NH3 is an acid in water, because it produces H+

Reaction of NH3 in water is

NH3 + H2O --> NH4+ + OH-

2. The total ion concentration = 0.1 M of K+ + 2X 0. M of SO4-2 =0.3 M total ion concentration

The same ion concentration is in 0.0750 M Na3PO4

0.075 PO4-3 + 3 X .075 M = 4X0.075 = 0.3 total ion conc

3. MnO4- is used as oxidizing agent as it itself get reduced to MNO4- and oxdizes Nitrogen

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.