Questions 10-13 refer to the following information. Cu(s) + 4 HNO3(aq) → Cu(NO3)2(aq) + 2 NO2(g) + 2 — Electrochemistry Chemistry Question
Question
Questions 10-13 refer to the following information.
Cu(s) + 4 HNO3(aq) → Cu(NO3)2(aq) + 2 NO2(g) + 2 H2O(l)
Each student in a class placed a 2.00 g sample of a mixture of Cu and Al in a beaker and placed the beaker in a fume hood. The students slowly poured 15.0 mL of 15.8 M HNO3(aq) into their beakers. The reaction between the copper in the mixture and the HNO3(aq) is represented by the equation above. The students observed that a brown gas was released from the beakers and that the solutions turned blue, indicating the formation of Cu2+(aq). The solutions were then diluted with distilled water to known volumes.
- Which of the following is true about the reaction?
It is a Brønsted-Lowry acid-base reaction, because the solution is neutral at the end.
It is a Brønsted-Lowry acid-base reaction, because HNO3(aq) is a strong acid.
It is a redox reaction, because Cu(s) is oxidized and H+(aq) is reduced.
It is a redox reaction, because Cu(s) is oxidized and the nitrogen atom in NO3−(aq) is reduced.