it -- This is from the third-person, singular form of the verb.

is, -- The verb "is" here is the common form of "to be" in Greek. It means to have a certain characteristic or remain in a certain condition. It also equates terms or assigns characteristics. 

the one  --(CW) The word "that one " is an adjective that highlights its noun as being in a specific place or time from a word that means "there." Used a pronoun, the sense is "that one there" or "this one here.

to -- This word "to" comes from the dative case of the following word that requires the addition of a preposition in English. The most common is a "to" for the English indirect object.

whom -- The word translated as "who" is a demonstrative pronoun ("this" "that"), but it often acts as a pronoun ("the one that), especially a connective pronoun ("the one that") introducing a dependent clause.

I -- This is from the first-person, singular form of the verb.

will -- This helping verb "will " indicates that the verb is the future tense. Helping or auxiliary verbs are needed to translate the Greek verb forms into English.

give -- The verb translated as "give" means "to give," "to grant," "to hand over," "appoint," "establish," and "to describe." It is almost always translated as some form of "give."

this -- The word translated as "this" is the Greek definite article, without a noun, it has the sense of "the one." The Greek article is much closer to our demonstrative pronouns ("this," "that," "these," "those") than the English "the." See this article for more.

piece,  - - "Piece" is from a diminutive form of a rare Greek word meaning "a morsel" or "a bit." It also means a gobbet of a man's flesh. So this means a "small morsel," but it could also be referring to the bread as Jesus's flesh.  This is the only time this word is used by Jesus and even its root is very rare in ancient Greek, appearing in only three works in the Perseus library.

of bread-- (IW) There is nothing that can be translated as "of bread" in the Greek source.

missing "to him"  -- (MW) The untranslated word  "to him" is the Greek word commonly translated as third-person pronouns in English.

when -- -(WW) The Greek word translated as "when" is used as the conjunction "and," but it also is used to add emphasis ("also").

I -- The pronoun "I" is used here. Since, as the subject of the sentence, it is part of the verb, its explicit use accentuates who is speaking "I." Saying "I myself" captures this feeling in English.

missing "myself" -- (MW)  The subjective pronoun repeats the information in the verb so it should be repeated in English like "I myself."

have -- (WT) This helping verb "hath" indicates that the verb is the tense indicating an action completed in the past. This is not the tense of the verb here, which is the future.

dipped  - "Dipped" is the Greek verb that means "dip", "temper" (metal), and "dye".  The "may" comes from the form which is one of possibility. This is the root word for "baptism". 

it. - -- This English objective pronoun is added and not in the Greek source.   In Greek, pronoun objects are not repeated after each verb because they are implied by their first occurrence.

in the dish.”  -- (IP) There is nothing that can be translated as "in the dish" in the Greek source.