La farmàcia és entre l'estació i el supermercat.

In Catalan, ser is very commonly used to give the basic location of something, especially a place or building. So La farmàcia és entre... is perfectly natural.

Very roughly:

• ser = simple identification or location
• estar = often emphasizes being/staying somewhere, or a state/condition

So for a fixed place like a pharmacy, és is the expected choice in a neutral sentence.

They help with stress and sometimes with word distinction.

• farmàcia: the stress falls on mà
• estació: the stress falls on the final ó
• és: the accent distinguishes it from es

So:

• és = is
• es = a pronoun, as in reflexive forms

Not every accent in Catalan has exactly the same job, but in this sentence they are all important for correct reading.

La is the feminine singular definite article, equivalent to the.

So la farmàcia means the pharmacy.

Catalan usually uses the definite article with specific nouns like this, so you normally would not drop it here.

Because la changes to l' before a vowel or silent h.

So:

• la + estació → l'estació

This is called elision. The noun is still feminine; only the form of the article changes.

You mostly learn noun gender together with the noun, but there is a useful pattern here: nouns ending in -ció are very often feminine.

Examples:

• la nació
• la informació
• la situació
• l'estació

So even though estació does not end in -a, it is feminine.

This is the normal Catalan pattern for between X and Y:

• entre X i Y

So in the sentence:

• entre l'estació i el supermercat

Here:

• entre = between
• i = and

It works very much like English structurally.

Because supermercat is a masculine singular noun, so it takes el.

• el supermercat

Catalan normally keeps the article with specific places and things, so l'estació i el supermercat is the natural form.

Catalan does have some article contractions, but not after every preposition.

For example:

• a + el → al
• de + el → del

But entre does not contract with the article. So you simply get:

• entre el supermercat
• entre l'estació

The l' in l'estació is not a special contraction with entre; it is just the normal elided article from la.

Yes, but La farmàcia és entre l'estació i el supermercat is the most straightforward neutral order.

If you want to emphasize the location, Catalan may use a different structure, for example:

• Entre l'estació i el supermercat hi ha la farmàcia.

So the original sentence is a simple, natural way to say it, but other wordings are possible depending on emphasis.