What does 2N nitric acid mean? How to configure it?
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Nitric acid: What does 2N mean, and how is it prepared? This post was last edited by Canghai Yili Sha on 2009-2-11 14:10.]
Molar concentration. 2 moles per liter of nitric acid. One N is 63, so two should be 126 grams. Usually, a concentrated solution is diluted; follow this procedure.
Molar concentration is denoted by “M”; the molar mass refers to the molecular weight of nitric acid. A nitric acid solution with a concentration of 2M means that 2 moles of nitric acid are used to prepare 1 liter of solution. “\"N\" is a way of expressing equivalent concentration. Equivalent concentration was widely used in the past but is hardly used these days. One equivalent means the transfer of one electron; for hydrochloric acid, which releases one hydrogen ion, the equivalent concentration is the same as the molar concentration. For sulfuric acid, however, the equivalent concentration is only half of the molar concentration. In ordinary redox reactions, things become more complex. For example, in the oxidation of sodium oxalate by potassium permanganate, if 2 moles of potassium permanganate react with 5 moles of sodium oxalate, then the molar concentration of potassium permanganate is equal to 5 times its equivalent concentration. If you want to use molar concentration. First, determine the unit of measurement, such as 1/2Na2CO3, HCl, NaCl+CO2+H2O; then determine the amount of substance, and calculate the molar concentration using the formula c=n/V. For example, 2 liters of water contains 5.3 g of 1/2Na2CO3; the amount of substance is 0.1 mol, and the molar concentration is c(1/2Na2CO3) = 0.05 mol/L. The above opinions are for reference only.
I agree with the view from the third floor. The concentration of concentrated nitric acid used as a reagent is usually 16 mol/L. It is prepared in a 1:7 ratio, and it should be noted that the exothermic reaction is quite intense. One volume of concentrated nitric acid is mixed with 7 volumes of water. However, nitric acid is not used as a standard titrant; it is merely a rough unit for indicating concentration
It is 2 mol/L; N has already been phased out. It is recommended that the original poster not use it. During preparation, add 1 volume of nitric acid to 7 volumes of water and stir well to prepare it.
Equivalent concentration is now used less frequently; internationally, molar concentration is adopted instead. Of course, we old-timers are still more accustomed to molar concentration; we’ll gradually make adjustments to keep up with the trends of the times
N is the equivalent concentration used in the past (generally, for acids, 1N corresponds to 1 H atom in the molecular formula, i.e., of the HX type); for nitric acid, N is identical to MOL/L
A unit that was phased out long ago; 1N refers to a solution concentration containing 1 mol/L of H+
N represents the equivalent concentration used in the past; it corresponds to the mol/L concentration used today. The molar concentration of concentrated nitric acid is 14.63 mol/L, and by diluting it proportionally, the desired value can be obtained