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An example given states that a 12C solution is equivalent to a "pinch of salt in both the North and South Atlantic Oceans", [24] [25] which is approximately correct. [26] One-third of a drop of some original substance diluted into all the water on earth would produce a preparation with a concentration of about 13C.
For example, if there are 10 grams of salt (the solute) dissolved in 1 litre of water (the solvent), this solution has a certain salt concentration . If one adds 1 litre of water to this solution, the salt concentration is reduced. The diluted solution still contains 10 grams of salt (0.171 moles of NaCl).
Molar concentration or molarity is most commonly expressed in units of moles of solute per litre of solution. [1] For use in broader applications, it is defined as amount of substance of solute per unit volume of solution, or per unit volume available to the species, represented by lowercase c {\displaystyle c} : [ 2 ]
Saline (also known as saline solution) is a mixture of sodium chloride (salt) and water. [1] It has a number of uses in medicine including cleaning wounds, removal and storage of contact lenses, and help with dry eyes. [2] By injection into a vein, it is used to treat hypovolemia such as that from gastroenteritis and diabetic ketoacidosis.
The following formula is used to calculate COD: = where b is the volume of FAS used in the blank sample, s is the volume of FAS in the original sample, and n is the normality of FAS. If milliliters are used consistently for volume measurements, the result of the COD calculation is given in mg/L.
Ringer's lactate solution is commonly used for fluid resuscitation after blood loss due to trauma, or surgery. [9] [10]It is extensively used in aggressive volume resuscitation, e.g. for patients with pancreatitis, hemorrhagic shock or major burn injuries. [10]
Zinc acetate is a component of some medicines, e.g., lozenges for treating the common cold. [1] Zinc acetate can also be used as a dietary supplement. [2] As an oral daily supplement it is used to inhibit the body's absorption of copper as part of the treatment for Wilson's disease. [3]
The term molality is formed in analogy to molarity which is the molar concentration of a solution. The earliest known use of the intensive property molality and of its adjectival unit, the now-deprecated molal, appears to have been published by G. N. Lewis and M. Randall in the 1923 publication of Thermodynamics and the Free Energies of Chemical Substances. [3]