So and such are intensifiers used to show how much of something.

So

• Used before adjectives and adverbs.
• It means very.
• E.g. The jumper is so nice.

Such

• Used before a noun phrase.
• Used before ‘a/an + adjective + singular countable noun’.
• Used before ‘adjective + plural/uncountable’.

So + that, such + that

• Connects the cause and the result together.
• Structure: so/such + (above structures) + that
• E.g. It was so hot that we stayed inside.