Acid Base Unit Test. CCS/Dr.Z/ChemName______

NOTE—Don’t forget to see Tables K, L and M for HELP!!!

  1. According to Arrhenius theory, an acid causes which aqueous ion concentration to increase?
  2. hydride ion
  3. hydronium ion
  4. hydrogen ion
  5. hydroxide ion
  1. A Bronsted-Lowry base in water:
  2. donates hydroxide ions in solution
  3. accepts hydrogen ions in solution
  4. donates hydrogen ions in solution
  5. accepts hydroxide ions in solution
  1. Given the following equilibrium equation: NH3(g) + H2O(l) NH4+(aq) + OH–(aq) …The H+ donator for the forward reaction is
  2. H2O(l)
  3. NH4+(aq)
  4. NH3(g)
  5. OH–(aq)
  1. Given the equation: NH3(g) + H2O(l) NH4(aq) + OH–(aq) …According to Bronsted-Lowry, NH3(g) molecules act as:
  2. an acid because they accept H+ ions
  3. an acid because they donate H+ ions
  4. a base because they accept H+ ions
  5. a base because they donate H+ ions
  1. H2SO4 + 2 H2O SO42- + 2 H3O… Circle the Bronsted-Lowry base for the reverse reaction.
  1. Bronsted or Lowry might suggest that H+ in water doesn’t really exist—that the hydrogen ion in water becomes:
  2. neutral
  3. basic
  4. hydronium
  5. a proton
  1. Which of these 1 M solutions will have a pH of approximately 12? (a) NaH (b) HCl (c) CH3OH (d) NaOH
  1. Given Solution A with a pH of 10, Solution B with a pH of 7, and Solution C with a pH of 5, which list has the solutions in order of decreasing H3O+ concentration? (a) A, B, C (b) C, A, B (c) B, A, C (d) C, B, A
  1. When an aqueous solution changes from pH 7 to pH 4, the hydronium ion concentration becomes:
  2. 1000 times less than the original amount
  3. 3 times less than the original amount
  4. 3 times greater than the original amount
  5. 1000 times greater than the original amount
  1. When Ka is large, an acid is:
  2. strong, with high pH and an extensive dissociation
  3. strong, with low pH and an extensive dissociation
  4. strong, with high pH and minimal dissociation
  5. strong, with low pH and an minimal dissociation
  1. Which sample will conduct an electric current?(a) NaOH(s) (b) H2O(l) (c) CH3OH(aq) (d) HCl(aq)
  1. A binary acid:
  2. has two different elements (in addition to the H)
  3. has two protons
  4. accepts two protons
  5. acts as an acid and a base
  1. A monoprotic acid:
  2. has one different element
  3. has one proton
  4. accepts one proton
  5. acts as an acid and a base
  1. Which is amphoteric (able to act as both an acid and a base)? (a) H3O+1 (b) HSO4-1 (c) NH4+1 (c) OH-
  1. When acid and base react in a neutralization, they form:
  2. H2O+ and MX
  3. water and base
  4. a pH 14 solution
  5. a pH 1 solution
  1. The name of the reaction between the hydrogen ions of a HX and the hydroxide ions of an MOH that will form water is: (a) substitution (b) ionization (c) saponification (d) neutralization
  1. Which pH is expected after titrating HCl and NaOH? (a) 1 (b) 7 (c) 8.8 (d) 12
  1. Which equation represents a neutralization reaction?
  2. Na2CO3 + CaCl22 NaCl + CaCO3
  3. H2CO3 + Ba  H2 + Ba(CO3)
  4. NaCl + AgNO3 AgCl + NaNO3
  5. H2SO4 + Mg(OH)2 MgSO4 + 2 H2O
  1. What molarity is a solution if 20 grams of NaOH is in 10 L final volume? (a) 2.0 M (b) 0.2 M (c) 0.5 M (d) 0.05 M

20g NaOH/(40g/mol) = 0.50mol… /10L = 0.050M

  1. What volume of 0.250 M HNO3(aq) is needed to neutralize 500.0 milliliters of 0.100 M NaOH(aq)?
  2. 62.5 mL (0.250 M HNO3(aq))(Va) = 0.100 M NaOH(aq))(500.0 milliliters)
  3. 25. mLVa = 200 mL
  4. 125 mL
  5. 200. mL