Hey biowarrior,
percent, in biology, generally means 5 grams per 100 ml. It is a weird measurement, but that's just how it is. Molarity (M) is moles per liter, where the mass of a mole is different for different compounds. For NaCl the molar mass is 58.44 g/mol (according to google), so you need about 60 g per liter. so 5% cannot be diluted to 1.5M, becuase 1.5M is about 90g/L and 5% is 50 g/L. Fortunately, NaCl is table salt so you can make your own 1.5M solution.
To do this, you should add less than the desired amount of water, to a beaker/flask/bottle (although i recommend a beaker, because the latter two are a pain in the ass to clean), add and try to dissolve the salt, and then add water up to how ever much you want to make. Salts/solutes do take up quite a bit of room at high concentrations.
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Hello DIY Bio,I wanted to decellurize a cornea from a porcine that i obtained. I wanted to find out if its ok to purchase sodium chloride (NACl) in a formof eye drops 5% from Walgreens. I want to use 1.5 M of NACI but this Ophthalmic Solution is 5%. I know a little about dilution and concentration.How would i dilute 1.5 M of NACI from a 5 percent bottle of eye drops that contain NACI ?--
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