La baldosa del pasillo está suelta.

Because baldosa is a feminine noun in Spanish, so it takes the feminine singular article la.

• la baldosa = the tile
• las baldosas = the tiles

The gender is grammatical, so it has to match the article and any adjectives connected to it.

Baldosa usually means a floor tile or paving tile.

In this sentence, it most naturally means a tile in the floor of the hallway.

A learner may confuse it with:

• suelo = floor, ground
• piso = floor / apartment (depending on context)
• azulejo = tile, often especially a wall tile

So baldosa is more specific than just floor.

Because de + el contracts to del in Spanish.

So:

• de el pasillo → del pasillo

This contraction is mandatory.

Here del pasillo means of the hallway or more naturally in English, in the hallway / the hallway’s.

It identifies which tile we are talking about: the hallway tile.

So:

• La baldosa = the tile
• del pasillo = of the hallway / in the hallway

Together:

• La baldosa del pasillo = the hallway tile / the tile in the hallway

Spanish often uses de + noun where English might use a noun-noun structure:

• la puerta del coche = the car door
• la luz de la cocina = the kitchen light

Because estar is used for a state or condition, and here suelta means loose, meaning not firmly fixed at the moment.

So:

• está suelta = it is loose

Using ser here would sound wrong because being loose is not treated as the tile’s essential identity; it is its current physical condition.

This is a very common ser vs estar distinction:

• La puerta está abierta = The door is open
• La baldosa está suelta = The tile is loose

Because the adjective must agree with baldosa, which is feminine singular.

Agreement:

• baldosa → feminine singular
• adjective must match → suelta

Compare:

• El cable está suelto = The cable is loose
• La baldosa está suelta = The tile is loose
• Las baldosas están sueltas = The tiles are loose

No. Suelto/suelta can have several related meanings depending on context, such as:

• loose
• not attached
• free
• separate / individual in some contexts

But in La baldosa del pasillo está suelta, the meaning is clearly loose in the physical sense: the tile is not firmly fixed.

Because Spanish and English package these ideas differently.

Spanish says:

• la baldosa del pasillo literally:
• the tile of the hallway

But natural English often prefers:

• the tile in the hallway

So de does not always translate word-for-word as of. In many cases, it simply links two nouns, and English may use:

• of
• in
• apostrophe-s
• or a noun used adjectivally

A Spain Spanish approximation would be:

lah bahl-DOH-sah del pah-SEE-yoh es-TAH SWEL-tah

A few notes:

• baldosa: stress on do
• pasillo: stress on si
• está: stress on the final á
• ll in standard Spain Spanish is usually like y in yes
• suelta begins with a sw-type sound: SWEL-ta

Yes, but it changes the meaning slightly.

• La baldosa del pasillo está suelta suggests a specific tile is known or identifiable.
• Una baldosa del pasillo está suelta means a tile in the hallway is loose, without specifying which one.

So both are correct, but la is more specific than una.

It becomes:

Las baldosas del pasillo están sueltas.

Notice the changes:

• la → las
• baldosa → baldosas
• está → están
• suelta → sueltas

Everything agrees in number.

Yes, completely normal.

The structure is:

• La baldosa del pasillo = subject
• está = verb
• suelta = adjective/complement

So the pattern is basically:

[Subject] + [estar] + [adjective]

This is a very common structure in Spanish:

• La ventana está abierta.
• El cable está roto.
• La baldosa del pasillo está suelta.

Yes, it sounds natural in Spain Spanish.

In Spain:

• pasillo is the standard word for hallway/corridor
• baldosa is a normal word for a tile, especially a floor tile

So the sentence sounds idiomatic and everyday: La baldosa del pasillo está suelta.