APChem Unit 4 topic questions 4.7-4.8

The diagrams above represent solutes present in two different dilute aqueous solutions before they were mixed. Water molecules are not shown. When the solutions were combined, a precipitation reaction took place. Which of the diagrams below is the best particle representation of the mixture after the precipitation reaction occurred?

D

The particle diagram above represents an aqueous solution of a weak monoprotic acid. The white circles represent H atoms. Which of the following shows the species that act as a Brønsted-Lowry base and its conjugate acid, in that order, in the solution?D

D OH2 and OH3

For the dissolution of HClHCl in water represented above, which of the following pairs includes the Brønsted-Lowry bases?

H2O(l)H2O(l) and Cl−(aq)

When 0.20 MM NH4Cl(aq)NH4Cl(aq) and 0.20 MM NaOH(aq)NaOH(aq) are mixed, the reaction represented by the equation above occurs and a strong smell of ammonia, NH3NH3, is observed. Based on this information, which of the following statements is true?

NH4+(aq)NH4+(aq) is a stronger acid than H2O(l)H2O(l) is.

When C2H4(g)C2H4(g) reacts with H2(g)H2(g), the compound C2H6(g)C2H6(g) is produced, as represented by the equation above. The reaction is correctly classified as which of the following types?

Oxidation-reduction, because H2(g)H2(g) is oxidized.

The compound C6H8O6C6H8O6 reacts with I2I2 according to the reaction represented by the equation above. The reaction is correctly classified as which of the following types?

Oxidation-reduction, because I2I2 is reduced.