Question

which combination of factors would result in the fastest reaction rate? 3.0 m nitric acid at 68° c with silver powder 1.0 m nitric acid at 20° c with silver powder 1.0 m nitric acid at 55° c with a silver ribbon

Explanation:

To determine the fastest reaction rate, we consider factors affecting reaction rates: concentration, temperature, and surface area. Higher concentration, higher temperature, and larger surface area (powder vs. ribbon) increase reaction rates.

• The first option has 3.0 M (highest concentration), 68°C (highest temperature), and silver powder (largest surface area).
• The second has lower concentration (1.0 M) and lower temperature (20°C).
• The third has lower concentration (1.0 M) and lower temperature (55°C) than the first, plus silver ribbon (smaller surface area than powder).

So the first option has the best combination of these factors.

Answer:

A. 3.0 M nitric acid at 68° C with silver powder