Surely you didn't mean 90% but that's what I read (and I assume that is 90% w/v). A 90% saline means 90 g NaCl/100 mL and you want 2500 mL; that will be
90g x (2500/100) = ? g NaCl.
Calculate the grams of solute required to make 2500mL of 90% saline solution?
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