Dextrose 5% in Normosol M Solution (D5NM) is a hypertonic solution that is non pyrogenic and is a nutrient replenisher. In each 1000mL of D5NM, it contains 234mg of sodium chloride. Calculate the osmolar concentration of sodium chloride, in terms of milliosmoles, represented by 500mL of D5NM.
My attempt was
1000mL of D5NM/234mg of NaCl = 500mL of D5NM/ xmg of NaCl
x = 117mg of NaCl
and now stuck with it
To calculate the osmolar concentration of sodium chloride in terms of milliosmoles (mOsm) represented by 500mL of D5NM, you need to convert the amount of sodium chloride (NaCl) from milligrams to milliosmoles.
First, let's determine the molar mass of sodium chloride. The molar mass of sodium (Na) is approximately 22.99 g/mol, and the molar mass of chlorine (Cl) is approximately 35.45 g/mol. The molar mass of NaCl is the sum of these two masses, which gives us 58.44 g/mol.
Next, we need to convert the amount of NaCl from milligrams to moles. Since 1 gram is equal to 1000 milligrams and 1 mole is equal to the molar mass in grams, we can use the following conversion factor:
1 g / 1000 mg = 1 mole / molar mass
In this case, the conversion factor will be:
1 g / 1000 mg = 1 mole / 58.44 g
Now, let's calculate the amount of NaCl in moles:
117 mg NaCl * (1 g / 1000 mg) * (1 mole / 58.44 g) = 0.002 mole NaCl
Finally, we can convert the amount of NaCl in moles to milliosmoles using the conversion factor:
1 mole NaCl = 1000 milliosmoles NaCl
0.002 mole NaCl * 1000 milliosmoles / 1 mole = 2 milliosmoles NaCl
Therefore, 500mL of D5NM contains approximately 2 milliosmoles of sodium chloride (NaCl).