In medicine, saline is a solution of sodium chloride (NaCl) in water, Saline can
ID: 538606 • Letter: I
Question
In medicine, saline is a solution of sodium chloride (NaCl) in water, Saline can also include sugars such as dextrose or pH buffers in smaller concentrations. Saline is used for such things as eye drops, rinsing contact lenses, nasal irrigation, IVs (intravenous solutions), etc. The most commonly used sterile normal saline^1 has 9.0 g of NaCl per liter (0.90% NaCl w/v). With your neighbor, determine the values for 0.500 L of a sterile normal saline solution. Some examples of other concentrations of saline include: Half-Normal Saline (0.45% NaCl w/v) - Used for diabetics, Quarter-Normal Saline (0.22% NaCl w/v) - Used in Neonatal Intensive Care Units (NICU: specialize in the care of ill or premature newborn infants), 7% NaCl - Used in the treatment of traumatic brain injury. Complete the table below for 0.500 L of each of these three solutions.Explanation / Answer
1) Answer:
0.45 % in 500mL
0.45 % means 0.45 g in 100 g of water.
water density is 1
In the question given 500 mL = 0.5 L
So,
The mass = 0.45 x 5
= 2.25 g
NaCl molar mass = 58.44
moles = mass / molar mass
= 2.25 / 58.44
= 0.0385
Molarity = moles / volume in Liter
M = 0.0385 / 0.5
M = 0.077
2) Answer:
0.22 % in 500mL
0.22 % means 0.22 g in 100 g of water.
water density is 1
In the question given 500 mL = 0.5 L
So,
The mass = 0.22 x 5
= 1.1 g
NaCl molar mass = 58.44
moles = mass / molar mass
= 1.1 / 58.44
= 0.0188
Molarity = moles / volume in Liter
M = 0.0188 / 0.5
M = 0.0376
3) Answer:
7 % in 500mL
7 % means 7 g in 100 g of water.
water density is 1
In the question given 500 mL = 0.5 L
So,
The mass = 7 x 5
= 35 g
NaCl molar mass = 58.44
moles = mass / molar mass
= 35 / 58.44
= 0.598
Molarity = moles / volume in Liter
M = 0.598 / 0.5
M = 1.197
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