Noi scaldiamo l'acqua, quindi vediamo una reazione veloce.

Questions & Answers about Noi scaldiamo l'acqua, quindi vediamo una reazione veloce.

Could I use perciò or dunque instead of quindi in this sentence?
Yes! Quindi, perciò, and dunque all mean "so" or "therefore" and are used to show the result of an action. In this sentence, because we heated the water, the result is that we see a fast reaction. You can swap quindi for perciò or dunque without changing the meaning.
Why doesn't the adjective veloce end in an '-a' since reazione is feminine?
Veloce is part of a group of adjectives that end in -e in their dictionary form. Unlike adjectives ending in -o (which change to -a for feminine words), adjectives ending in -e stay exactly the same for both masculine and feminine singular nouns. If the reaction were plural (le reazioni), it would change to an '-i' (veloci).
Why isn't there a noi in front of vediamo like there is in front of scaldiamo?
In Italian, subject pronouns like noi (we) are optional because the verb endings (-iamo in scaldiamo and vediamo) already tell us who is doing the action. The speaker chose to use noi at the start for a little emphasis, but didn't need to repeat it for the second verb. You could drop the first noi completely and the sentence would still be perfect.
Is reazione always feminine because it ends in -zione?
Yes! This is a very handy rule to remember. Almost all Italian words ending in -zione (like reazione, stazione, lezione) are feminine. That's why we use the feminine article una before it.

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