"Where is the kitchen?"

Translation: 주방이 어디 있어?

[WesSudduth1]

부엌/주방=Kitchen

[Tim608103]

Why is it 어디 and not 어디에?

[mcriss8]

It's just something that can be dropped.

[SvedishPlumber]

I have rhe same question

[SeanFogart4]

어디 (always next to the verb) feels like "where", 어디에 like "where ~ located" and is more formal (probably your "polite" in Korean). You could say both here: "Where is the kitchen (located)?" I'd drop the located especially as it is in the familiar form here.

[CF00l]

廚房은 어디 있어요?

[emma022005]

What's the difference between 주방 and 부엌?

[Wang_Jackson]

Nothing. Both are used quite frequently and are almost same.

[Wang_Jackson]

Update : 부엌 is slightly more common.

[George_Wang64]

부엌 is native Korean word