43
Which of these represents a redox reaction?
- A. AgNO3 + NaCl → AgCAl + NaNO3
- B. H2S + Pb(NO3) → PbS + 2HNO3
- C. CaCO3 → CaO + CO2
- D. Zn + 2HCl → ZnCl2 + H2
44
How many coulombs of electricity are passed through a solution in which 6.5 amperes are allowed to run for 1.0 hour?
- A. 3.90 x 102 coulombs
- B. 5.50 x 103 coulombs
- C. 6.54 x 103 coulombs
- D. 2.34 x 104 coulombs
45
Which of the following solutions will conduct the least amount of electricity?
- A. 2.00 M aqueous solution of NaOH
- B. 0.01 M aqueous solution of NaOH
- C. 0.01 M aqueous solution of hexanoic acid
- D. 0.01 M aqueous solution of sugar
46
Which of the following is an acidic salt?
- A. NaHSO4
- B. Na2SO4
- C. CH3CO2Na
- D. Na2S
47
Which of the following salts when dissolved in water will NOT give the corresponding pH value?
- A. NaHSO4, pH < 5
- B. Na2CO3, pH > 8
- C. Na2Cl,pH = 7
- D. NaHCO, pH < 6