MULTIPLE CHOICE. Choose the one alternative that best completes the state 1) 1)

Question

MULTIPLE CHOICE. Choose the one alternative that best completes the state 1) 1) Choose the statement below that is TRUE weak acid solution consists of mostly A) A nonionized acid molecules. B) The term "strong electrolyte" means that the substance is extremely reactive C) A molecular compound that does not ionize in solution is considered a strong electrolyte. D) A strong acid solution consists of only partially ionized acid molecules. E) The term "weak electrolyte" means that the substance is inert. 2) 2) Give the net ionic squation for the reaction (f any) that occurs when aqueous solutions of lithium sulfide and copper(I) nitrate are mixed. A) 2 Li.(aq) + S2-(ap + Cu2+(aq) + 2 NO3-(aq) Cu2+(aq) + S2-(aq) + 2 LiNO3(s) B) S2-(aq) + Cu2+(aq) Cuse) C) 2 Lit(aq) + S2-(aq) + Cu2+(aq) + 2 NOg-(aq) CuS(s) + 2 Li+(aq) + 2 NO3-(aq) D) Li.(aq) + NO3-(aq) LiNO3(s) E) No reaction occurs. 3) 3) Give the spectator ions for the reaction that occurs when aqueous solutions of H2504 and KOH are mixed. A) H+ and OH- B) Kt and S042- C) Ht and SO42- D) OH- and K E) No spectator ions are present.

Explanation / Answer

Q1

a) true, since weak acids will not ionize 100% in solution

b) false, it means it iwll dissociate in 100% solution

c) false, it is reversed

d) false, they will have almost 100% ionization

e) false, it has nothing to do with reactivity

Q2.

net ionic --> include only reacting ions

LiS + Cu(NO3)2

reactings species, Cu+2 + S-2 form CuS(s()

so

Cu2+(aq) + S2-(aq) <-> CuS(s)

Q3

spectator ions --> will not react

for acid base, this is the case of salt

SO42- and K+ will form K2SO4 salt in solution

choose B

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