Question

A solution is prepared by dissolving \[5.6{\text{ }}g\] of KOH is \[250{\text{ }}ml\] of it. Calculate the molarity of the solution? (Molar mass KOH: \[56{\text{ }}g/{\text{ }}mol\])

Answer 1

Hint: Molarity (M) suggests the quantity of moles of solute in line with a liter of answer (moles/Liter) and is one of the maximum not unusual place gadgets used to determine the concentration of an answer. Molarity may be used to calculate the quantity of solvent or the quantity of solute. The concentration of a substance in answer expressed because the quantity of moles of solute are in line with the liter of answer.
Formula to be used:
The method for molar concentration c is
\[c = \dfrac{{moles}}{{litres}}\]

Complete answer:
To calculate the molarity of an answer, the quantity of moles of solute has to be divided via way of means of the entire liters of answer produced. If the quantity of solute is given in grams, we have to first calculate the quantity of moles of solute by the use of the solute’s molar mass, then calculate the molarity the use of the quantity of moles and overall quantity.
The method for molar concentration c is
\[c = \dfrac{{moles}}{{litres}}\]
 \[Moles{\text{ }} = 0.0998{\text{ }}mol{\text{ }}KOH\]
 \[
  Litres = 250mL \times \dfrac{{1{\text{ }}L}}{{1000mL}} \\
   = 0.2500{\text{ }}L \\
 \]
\[c = \dfrac{{0.0998mol}}{{0.2500L}} = 0.40mol/L\]
Molar concentration or molarity is maximum usually expressed in gadgets of moles of solute in line with a liter of answer. For use in broader applications, its miles described as the quantity of substance of solute in line with unit quantity of answer, or in line with the unit quantity to be had to the species, represented via way of means of lowercase: c

Note:
Molar concentration (additionally known as molarity, quantity concentration or substance concentration) is a degree of the concentration of a chemical species, mainly of a solute in an answer, in phrases of quantity of substance in line with unit the quantity of answer. In chemistry, the probably used unit for molarity is the quantity of moles in line with liter, having the unit image \[mol/L{\text{ }}or{\text{ }}mol \cdot d{m^{ - 3}}\] in SI unit.