NaCl (gmw=58g, valence=1)
Grams of equivalent weight = 58/1 = 58grams
so 1EQ/ 58grams=1
Normality is expressed in Eq/L
With 1% defined as 1 gram per 100 ml, 85% is 85 grams per 100 ml
(1EQ/58grams) * (85grams/100ml) * (1000ml/L) = 85000eq/5800L = 14.655 or 15N
Although I don't think you were supposed to do 85%, for clinical chemistry it should be something more like 0.85% or the solution would be too hypertonic. In which case it would be
(1eq/58grams)*(0.85grams/100ml)* (1000ml/L) = 850eq/5800L = 0.14655 or 0.15N
FG 9/16/2012
it is hypotonicQuoting from someone else's reply to this question What_is_an_example_of_a_hypotonic_solution,"0.45% NaCl (half-normal saline solution); since normal saline is 0.9% NaCl, any solution less than 9% is hypotonic".Doesn't this mean that 10% is hypertonic?
Isotonic
normal saline is 0.85%w/v NaCl whlist physiological saline is 0.90% w/v NaCl.
Saline is nothing more than salt water. Salt is NaCl. Normal saline is a 0.9% solution of NaCl in H2O.
More simply, normal (0.9%) saline contains the same concentration of salt as your body fluids. For this reason, it is the most commonly used saline solution, for IV'sor other uses such as flushing wounds, eye baths, etc. "Normal" silane is referred as 0.9% ( 1% commonly. As in "get me some 1%, stat!) NaCl in water, but that's based only on Hartog Jakob Hamburger's 1882 study of red cell lysis. The correct concentration of salt in the human blood is 0.6%. Still, it's easier to say "1% solution" because it's easy to remember.
If you think to an isotonic solution the concentration is 0,9 g NaCl/100 g solution.
Normal Saline Solution, or anything that contains 0.9% NaCl
it is hypotonicQuoting from someone else's reply to this question What_is_an_example_of_a_hypotonic_solution,"0.45% NaCl (half-normal saline solution); since normal saline is 0.9% NaCl, any solution less than 9% is hypotonic".Doesn't this mean that 10% is hypertonic?
- preparation of isotonic or other saline solutions- nose disinfection- as a salt bath
No,5percent glucose is an isotonic solution. 0.9 percent is for NaCl.
Yes this saline is a hypertonic solution but 3% saline is also not normal. There is nothing "normal" about it. There is only one "normal saline" and that is 0.9%.
i = isotonic molar [glucose] / isotonic molar [NaCl] i = 14 M / 7 M = 2 i = isotonic molar [glucose] / isotonic molar [NaCl] i = 14 M / 7 M = 2 i = isotonic molar [glucose] / isotonic molar [NaCl] i = 14 M / 7 M = 2 i = isotonic molar [glucose] / isotonic molar [NaCl] i = 14 M / 7 M = 2
This a saline solution with the concentration of 0,9 g NaCl/100 mL distilled water. This is a isotonic solution; the meaning is that the osmotic pressure of the this solution is equal to the osmotic pressure of the blood serum.
Isotonic
The solution of NaCl with the concentration 0,9 % is considered normal saline; the osmotic pressure is equal to the pressure in the cells.
0.85% nacl sol or normal saline solution is used as it is an isotonic solution which will emmulsify bacterial cells and dont cause any injury ( injury due to osmotic gradient in which cell can shrink or swell/burst ). solution upto 0.98% can be used.
D5 0,3 NaCl is recommended to add to the body water, sucrose and ions as Na+ and Cl-.