Se você mastigar devagar, vai ficar mais fácil engolir esse remédio.

Not exactly. In this sentence, mastigar is the future subjunctive, used after se when talking about a possible future condition.

So:

• Se você mastigar devagar... = If you chew slowly...

This can be confusing because with regular -ar verbs, the future subjunctive form for você/ele/ela looks exactly like the infinitive:

• infinitive: mastigar
• future subjunctive: se você mastigar

So it looks the same, but its job in the sentence is different.

Because the sentence is about a real possibility in the future.

Portuguese often uses:

• se + future subjunctive
• quando + future subjunctive

when the speaker means if/when this happens later.

So:

• Se você mastigar devagar, vai ficar mais fácil...

is the natural way to say If you chew slowly, it will become easier...

English does not have this special verb form, but Portuguese does.

You might hear that in some contexts, but it changes the feel.

• Se você mastigar devagar... = about a future result or a specific situation
• Se você mastiga devagar... = more like a general habit or repeated situation

For this sentence, where the idea is do this and then this result will happen, mastigar in the future subjunctive is the best choice.

Both are correct, but vai ficar is much more common in everyday Brazilian Portuguese.

• vai ficar = spoken, natural, very common
• ficará = more formal, more written, sometimes more distant in tone

So:

• vai ficar mais fácil sounds very normal in conversation.

Here, ficar means become or get.

So:

• vai ficar mais fácil = it will become easier / it will get easier

This is a very common use of ficar in Portuguese when something changes state:

• ficar feliz = become happy
• ficar difícil = become difficult
• ficar mais fácil = become easier

Yes. Both are possible, but there is a slight nuance.

• vai ficar mais fácil emphasizes a change: it becomes easier after you do something
• vai ser mais fácil is a bit more neutral: it will be easier

In this sentence, ficar works very well because the idea is that chewing slowly changes the situation.

Portuguese often does not use a dummy subject like English it.

English says:

• It will be easier to swallow this medicine

But Portuguese can simply say:

• Vai ficar mais fácil engolir esse remédio

The idea engolir esse remédio acts like the thing that is easy. Portuguese does not need to add a separate it.

Because fácil is describing the situation/action, not the way someone performs the action.

• mais fácil = easier
• mais facilmente = more easily

In this sentence, Portuguese prefers the structure with the adjective:

• vai ficar mais fácil engolir esse remédio

That matches English pretty closely:

• it will be easier to swallow this medicine

If you used mais facilmente, the sentence structure would have to be different.

Yes, but the structure usually changes a little.

The sentence as written is natural:

• Vai ficar mais fácil engolir esse remédio

Another natural version is:

• Esse remédio vai ficar mais fácil de engolir

So both patterns exist:

• é/ficar fácil + infinitive
• algo é/ficar fácil de + infinitive

The sentence you were given uses the first pattern.

• engolir = to swallow
• tomar = to take medicine

So:

• tomar remédio is the general expression for take medicine
• engolir remédio focuses on the physical act of swallowing it

This sentence uses engolir because the point is that it will be physically easier to get the medicine down.

In Brazilian Portuguese, esse is very often used where traditional grammar might suggest este.

In practice, in Brazil:

• esse remédio is a completely normal way to say this medicine
• este remédio is correct too, but often sounds more formal or less common in everyday speech

So for most learners of Brazilian Portuguese, esse is the form you will hear more often.

Sometimes yes, especially if the subject is obvious from context. But in this sentence, keeping você sounds clearer and more natural.

Also, the form mastigar looks the same for several subjects in the future subjunctive, so você helps avoid ambiguity.

• Se você mastigar devagar... = clear and neutral
• Se mastigar devagar... = possible in context, but less explicit

Devagar means slowly.

Its most neutral position here is after the verb:

• mastigar devagar = chew slowly

That word order is very common in Portuguese: verb + adverb.

You could move it in some contexts for emphasis, but mastigar devagar is the standard, natural order.

The accent marks show where the stress goes.

• você → stress on the last syllable: vo-CÊ
• remédio → stress on MÉ: re-MÉ-dio

A few helpful stress patterns in the sentence:

• mastigar → mas-ti-GAR
• devagar → de-va-GAR
• engolir → en-go-LIR
• remédio → re-MÉ-dio
• você → vo-CÊ

So the accents are not decorative; they help tell you how to say the word correctly.