Breakdown of J'ai de la colle, est-ce que tu veux l'utiliser ?
je
I
tu
you (informal singular)
avoir
to have
est-ce que
is it that / do / does (question marker)
Questions & Answers about J'ai de la colle, est-ce que tu veux l'utiliser ?
Why does the l' go right before utiliser instead of before veux?
In French, when a conjugated verb is followed by an infinitive (an unconjugated verb like utiliser), the object pronoun goes directly before the infinitive it belongs to. You are asking if they want to use it, so l' goes right before utiliser, not before veux.
What does the l' stand for here, and why isn't it la?
The l' stands for la colle (the glue). Because colle is feminine, the direct object pronoun for "it" is normally la. However, because utiliser starts with a vowel, la must drop its "a" and become l' to make it easier to pronounce.
Since the first half uses de la colle (some glue), shouldn't we use the pronoun en in the second half?
If you were simply asking "do you want some?", you would indeed use en (est-ce que tu en veux ?). But the verb here is utiliser (to use), and you are asking "do you want to use it?". Since you are referring to the glue as a specific object to be used, you need the direct object pronoun l'.
Why does the sentence say de la colle instead of just la colle?