Question

A water-treatment plant is designed to remove dissolved manganese (Mn2+) and iron (Fe from the water. The water is aerated to oxidize these reduced species and cause formation of a solid precipitate that can then be filtered out of the water. The reaction for Mn is If the [Mn2+] equals 25x10-6 M, pH is maintained at 7, temperature is 25°C, and the oxygen concentration is maintained at a constant value by blowiilibrated with the atmosphere into the solution, will be the reaction proceed forward as written? (Answer: YES!). To determine the order of the reaction and the rate constant, a laboratory experiment is conducted that yields the following results Time (min) Mn2M) 25 17.7 11.1 6.25 12 6. Is this reaction: a- first order b- second order c- zero order d- Third order

Answer 1