Какова молярная концентрация вещества (c), молярная концентрация эквивалентов вещества (cэк), массовая доля

Molar concentration (c) is a measure of the number of moles of a solute dissolved in a given volume of solution. It is calculated by dividing the number of moles of solute (n) by the volume of the solution (V):

c = n / V

where c is the molar concentration, n is the number of moles, and V is the volume in liters.

Molar concentration of equivalent substance (cэк) is similar to molar concentration, but it takes into account the stoichiometry of a reaction. It is calculated by dividing the number of equivalents of solute by the volume of the solution:

cэк = neк / V

where cэк is the molar concentration of equivalent substance, neк is the number of equivalents, and V is the volume in liters.

Mass fraction (ω, %) of a solute in a solution is the ratio of the mass of the solute to the total mass of the solution, expressed as a percentage:

ω, % = (mass of solute / total mass of solution) * 100

where ω, % is the mass fraction, and the masses are usually expressed in grams.

Titration is a process used to determine the concentration of an unknown substance (usually an acid or a base) by reacting it with a standard solution of known concentration (titrant). The volume of the titrant required to reach a specific point of reaction is called the titre (т).

Например:
Calculate the molar concentration of a solution containing 2 moles of solute dissolved in 0.5 liters of solution.
c = 2 / 0.5 = 4 M

Совет:
To better understand molar concentration and related concepts, it"s helpful to review the basic principles of stoichiometry, which relates the quantities of reactants and products in a chemical reaction. Additionally, practice solving numerical problems involving molar concentration and related calculations to strengthen your understanding.

Задание:
Calculate the mass fraction of glucose (C6H12O6) in a solution if 80 grams of glucose are dissolved in 320 grams of water.