Normal saline solution is 0.91%w/v.
Calculate the concentration of this solution in milligrams per litre (mg/L)
0.91% w/v means 0.91 g NaCl/100 mL soln.
That is the same as 9.1 g NaCl/1 L and that is 9100 mg/L.
To calculate the concentration of a solution in milligrams per liter (mg/L), you need to convert the percentage concentration to grams per liter (g/L) and then convert the grams to milligrams.
First, let's convert the percentage concentration to grams per liter:
0.91%w/v means that there are 0.91 grams of solute per 100 milliliters (mL) of solution.
To convert grams per 100 mL to grams per liter, we can use the conversion factor 1 mL = 0.001 L:
0.91 grams/100 mL * 10 g/L = 9.1 grams/L
Now, let's convert grams to milligrams:
9.1 grams/L * 1000 mg/g = 9100 mg/L
So, the concentration of the normal saline solution in milligrams per liter (mg/L) is 9100 mg/L.