Il mandarino è facile da sbucciare, mentre l’uva la lavo sempre prima di cena.

Yes, and Italian can also use the plural: I mandarini sono facili da sbucciare.

But Italian very often uses the singular with the definite article to talk about a whole category in a general way. So Il mandarino è facile da sbucciare means something like The mandarin is easy to peel / Mandarins are easy to peel.

This is a common pattern in Italian, not just with fruit.

Because uva in Italian is usually a collective or mass noun. Grammatically it is singular feminine, but in meaning it often corresponds to English grapes.

So:

• l’uva = grapes, grape(s) as a food item in general
• un acino d’uva = one grape

This is also why the pronoun later is la, not le: grammatically, uva is singular.

Because the feminine singular article la becomes l’ before a vowel.

So:

• la + uva → l’uva

It is still feminine singular. The apostrophe is just an elision for smoother pronunciation.

After adjectives like facile, difficile, impossibile, Italian often uses:

adjective + da + infinitive

So:

• facile da leggere = easy to read
• difficile da capire = hard to understand
• facile da sbucciare = easy to peel

In this pattern, da does not mean from. It is part of a structure that expresses what can be done to something.

So Il mandarino è facile da sbucciare means A mandarin is easy to peel.

Sbucciare means to peel, especially in the sense of removing the outer skin or peel of fruit or vegetables.

For example:

• sbucciare una mela = to peel an apple
• sbucciare una patata = to peel a potato

It comes from buccia, which means peel / skin.

It can mean while, but here it also has a strong sense of whereas / on the other hand.

So in this sentence, mentre is not only about two things happening in relation to each other. It is mainly introducing a contrast:

• mandarins: easy to peel
• grapes: I always wash them before dinner

So here mentre is close to whereas or while, on the other hand.

That la is a direct object pronoun, and it refers back to l’uva.

Italian often does this when the object is moved to the front for emphasis or contrast. This is called topicalization or left dislocation.

So:

• Lavo sempre l’uva prima di cena = neutral word order
• L’uva la lavo sempre prima di cena = As for grapes, I always wash them before dinner

The extra la helps link the fronted noun to the verb. It sounds very natural in Italian.

Because l’uva is grammatically feminine singular.

Even though English uses grapes, Italian treats uva as singular, so the direct object pronoun must also be singular:

• la lavo = I wash it

If the noun were plural feminine, you would use le.

Lavo is the first person singular present tense of lavare, so it already means I wash.

Italian usually omits subject pronouns when they are not needed, because the verb ending already shows the subject.

So:

• lavo = I wash
• io lavo = I wash, with extra emphasis on I

In this sentence, io is unnecessary unless you want special emphasis.

Prima di cena is the normal idiomatic way to say before dinner in a general sense.

With meals, Italian often uses expressions without the article when speaking generally:

• prima di pranzo = before lunch
• dopo cena = after dinner
• a colazione = at breakfast

Prima della cena usually sounds more specific, like before the dinner or before a particular dinner event.

Yes. A more neutral version would be:

Lavo sempre l’uva prima di cena.

The sentence you have, l’uva la lavo sempre prima di cena, puts l’uva first to create contrast with il mandarino in the first clause.

So the chosen order is doing more than just giving information; it is also shaping the emphasis:

• il mandarino: easy to peel
• l’uva: that is the thing I always wash before dinner