How do I get 40% NaCl?

It belongs to the liquid, for example 500 ml of 0.9 NaCl, inject 40% NaCl. We have 10% NaCl at our disposal. I will be grateful for your suggestions.
It belongs to the liquid, for example 500 ml of 0.9 NaCl, inject 40% NaCl. We have 10% NaCl at our disposal. I will be grateful for your suggestions.
Show original content

4 users upvote it!

3 answers