The reaction of 2,2-dimethylpentan-3-one with bromine yields a monobrominated product in acidic medium but gives a dibrominated product in basic medium. draw the products of each reaction and propose an explanation as to why there is a difference in reactivity between acidic and basic media.

The reactions mechanisms and products structures are in the attached picture.

Explanation:

The acid-catalysed bromination of ketones leads to a monobrominated product. The first step of the reaction occurs in a cyclic way. The addition of more bromines is not possible due to steric impediment

The base-catalysed bromination of ketones leads to a dibrominated product.

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation:

the tides are influenced by both the moon and the sun, it's easy to see that when the sun lines up with the moon and the earth, as during a new moon or full moon, the tidal effect is increased. these are known as spring tides, named not for the season, but for the fact that the water "springs" higher than normal. on the other hand, if the sun and the moon are 90 degrees apart in relation to an observer on earth as during the first quarter moon or third quarter moon, then high tides are not as high as they normally would be. this is because despite its greater distance, the sun's mass allows it to exert enough gravitational force on the oceans that it can negate some of the effects of the moon's pull. this phenomenon of lower high tides is called a neap tide. if you need more information on this topic visit moonconnection.com.