MCAT General Chemistry Question 297: Answer and Explanation
Home > MCAT Test > MCAT general chemistry practice tests
Test Information
- Use your browser's back button to return to your test results.
- Do more MCAT general chemistry practice tests.
Question: 297
4. Which of the following best describes the cell used in the experiment?
- A. Beaker X contains the cathode that is negatively charged.
- B. Beaker Y contains the cathode that is negatively charged.
- C. Beaker X contains the anode that is negatively charged.
- D. Beaker Y contains the anode that is negatively charged.
Correct Answer: C
Explanation:
C Electrons always travel from anode to cathode. Loss of electrons, or oxidation, always occurs at the anode and gain of electrons, or reduction, always occurs at the cathode. A concentration cell is spontaneous, so electrons will spontaneously flow to a positive charge. Therefore, the cathode must be positively charged, eliminating choices A and B. Since [Cu2+] will increase in X and decrease in Y, X is the site of oxidation, or anode.