How many milligrams of sodium chloride are in 250 ml of 0.9% sodium chloride solution (w/v)?
I got 2,270 grams.
250ml * 0.009 g/ml = 2.25g
To calculate the amount of sodium chloride in milligrams (mg) in a given volume of a 0.9% sodium chloride solution (w/v), you will need to follow a few steps:
Step 1: Convert the given volume from milliliters (ml) to liters (L).
Since 1 liter equals 1000 milliliters, divide 250 ml by 1000 to convert it to liters:
250 ml ÷ 1000 = 0.25 L
Step 2: Calculate the mass of sodium chloride in the solution using the concentration (0.9%).
0.9% sodium chloride solution means 0.9 grams of sodium chloride per 100 ml of solution. So, for 0.25 L (250 ml) of solution, you can use the following calculation:
0.9 grams/100 ml × 250 ml = 2.25 grams
Step 3: Convert the mass from grams (g) to milligrams (mg).
Since 1 gram equals 1000 milligrams, multiply the calculated mass of sodium chloride by 1000:
2.25 grams × 1000 = 2250 mg
Therefore, the correct answer is 2250 milligrams (mg) of sodium chloride in 250 ml of 0.9% sodium chloride solution (w/v).