1. So or such?

2. When to use “so” and “such”
We use 'so' and 'such' to add emphasis. 
It's cold today.
It's so cold today. 

3. He’s a tall man
He’s such a tall man

4. But when do we use “so” and when “such”?
Let’s see if you can figure it out:
She’s so nice
She’s such a nice person
Today is so hot
Today is such a hot day
He is so intelligent
He is such an intelligent guy
Got it?

5. But when do we use “so” and when “such”?
Let’s see the sentences again:
She’s so nice (so + adjective)
She’s such a nice person (such + a + adj. + noun)
Today is so hot (so + adjective)
Today is such a hot day (such + a + adj. + noun)
He is so intelligent (so + adjective)
He is such an intelligent guy (such + a + adj. + noun)
What’s the difference?

6. Here’s the explanation
So, is used before an adjective or adverb to add emphasis:
She’s so pretty (so + adjective)
He ran so quickly (so + adverb)
Such, is used before a noun (with or without adjective)
Ann is such a funny person (such + a + adj. + noun)
He acted like such a jerk (such + a + noun)