Question

how many grams of NaCl required to prepare in 2500 ppm(w/v) NaCl 250 mL solution
1 ppm = 1 mg/L; therefore,
2500 ppm = 2500 mg/L.
You want 250 mL; therefore, 2500 x 250/1000 = ? mg/250 mL.
Now convert mg to grams and you have it.
How many grams of NaCl required to prepare 20 % (w/v) NaCl solution

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