Choose the statements that accurately describe the Wittig reaction.

STRATEGY: Review the characteristics of the Wittig reaction. Consider the types of reactants involved, the type of transformation that occurs, and the types of products that result.

A. the product is an ylide
B. involves a ylide as a reactant/intermediate
C. results in a betaine intermediate
D. a ketone is a required reactant
E. a C=C bond becomes saturated

B. Involves a ylide as a reactant/intermediate  

C. Results in a betaine intermediate

Explanation:

The Wittig reaction is the reaction of an aldehyde or ketone with a triphenylphosphonium ylide to form an alkene.

A betaine intermediate is the precursor to an oxaphosphetane intermediate.

A. is wrong. The ylide is a reactant/intermediate.

D. is wrong. The reactant can be an aldehyde

E. is wrong. A C=O bond becomes a C=C bond.

- decrease the number of plants and animals living in the water.

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.