Learn Spanish (Latin America): El café provisto produce menos acidez de lo que esperábamos. - The provided coffee produces less acidity than we expected.

The verb proveer (to provide) is one of the few Spanish verbs with two accepted past participles: the regular proveído and the irregular provisto. While both can be used in perfect tenses (like hemos provisto or hemos proveído), provisto is heavily preferred when used as an adjective modifying a noun, just like it modifies café here.

Why do we use de lo que here for "than" instead of just que?

When you compare a noun (here, acidez) to a full clause with a conjugated verb (here, esperábamos), you use de lo que instead of que. If you were comparing two nouns, you would use que (for example, produce menos acidez que el otro café - it produces less acidity than the other coffee).

Why is esperábamos in the imperfect tense rather than the preterite?

The imperfect is used here because the expectation was an ongoing mental state leading up to the moment they actually drank the coffee. The preterite would imply a single, completed action with a definite start and end, which doesn't fit the continuous background nature of having an expectation.

Is acidez related to the adjective ácido? How does that suffix work?