MAKEUP - Quiz 3 Acids & Bases

Which two formulas represent Arrhenius acids?

• (1) CH3COOH and CH3CH2OH

• (2) HC2H3O2 and H3PO4

• (3) KHCO3 and KHSO4

• (4) NaSCN and Na2S2O3

An Arrhenius base has

• (1) only hydroxide ions in solution

• (2) only hydrogen ions in solution

• (3) hydrogen ions as the only positive ions in solution

• (4) hydroxide ions as the only negative ions in solution

A truck carrying concentrated nitric acid overturns and spills its contents. The acid drains into a nearby pond. The pH of the pond water was 8.0 before the spill. After the spill, the pond water is 1,000 times more acidic. What is the new pH of the pond water after the spill?

In which solution will thymol blue indicator appear blue?

• (1) 0.1 M HCl

• (2) 0.1 M CH3COOH

• (3) 0.1 M H2SO4

• (4) 0.1 M KOH

A student neutralized 16.4 milliliters of HCl by adding 12.7 milliliters of 0.620 M KOH. What was the molarity of the HCl acid?

(HINT: Use the titration formula in Ref Table T)

• (1) 0.168 M

• (2) 0.480 M

• (3) 0.620 M

• (4) 0.801 M

Which compound could serve as a reactant in a neutralization reaction?

• (1) NaCl

• (2) KOH

• (3) CH3OH

• (4) CH3CHO

The only positive ion found in an aqueous solution of sulfuric acid is the

• (1) hydroxide ion

• (2) sulfite ion

• (3) hydronium ion

• (4) sulfate ion

Which chemical equation represents the reaction of an Arrhenius acid and an Arrhenius base?

• (1) HC2H3O2(aq) + NaOH(aq) → NaC2H3O2(aq) + H2O(l)

• (2) C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(l)

• (3) Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g)

• (4) BaCl2(aq) + Na2SO4(aq) → BaSO4(s) + 2 NaCl(aq

Sulfuric acid, H2SO4(aq), can be used to neutralize calcium hydroxide, Ca(OH)2(aq). What is the formula for the salt produced by this neutralization?

• (1) CaS

• (2) CaSO2

• (3) CaSO3

• (4) CaSO4

A sample of wet soil has a pH of 4.0. After the addition of quicklime, the H+ ion concentration of the soil is 1/100 of the original H+ ion concentration of the soil. What is the new pH of the soil sample?

• (1) The pH increases to 6.0

• (2) The pH decreases to 2.0

• (3) The pH decreases to 0.04

• (4) There is no change in the soil pH