La decalcificazione usa il decalcificante.

Descaling uses the descaling solution.

Breakdown of La decalcificazione usa il decalcificante.

• usare: to use
• il decalcificante: the descaling solution
• la decalcificazione: the descaling process

Questions & Answers about La decalcificazione usa il decalcificante.

What is usa here, grammatically?

Usa is the third-person singular present indicative of usare.

So it means uses.
The subject is La decalcificazione, which is singular, so the verb is singular too:

• la decalcificazione usa
• not la decalcificazione usano

In many contexts, the Italian present tense can also cover what English might express as uses or is using, depending on context.

Why are the articles la and il different?

Because Italian articles must agree with the gender and number of the noun.

• la decalcificazione → feminine singular
• il decalcificante → masculine singular

So even though both articles can translate as the, they are different in Italian because the nouns are different grammatical genders.

Why is it il decalcificante and not lo decalcificante?