Question

..molarity and molaliity plzz explain

Answer 1

here is your answer ⤵⤵

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✔✔ MOLARITY ✔✔

Molarity of a solution is the number of moles of the solute per litre of solution (or number of millimoles per ml. of solution). Unit of molarity is mol/litre or mol/dm3

 For example, a molar (1M) solution of sugar means a solution containing 1 mole of sugar (i.e., 342 g or 6.02 x 10^23 molecules of it) per litre of the solution.

• Molarity is most common way of representing the concentration of solution.

If molarity and volume of solution are changed from M1, V1 to M2, V2. Then,

  M1, V1 = M2, V2 (Molarity equation)

depend on temperature as, M ∝ 1/T

• When a solution is diluted (x times), its molarity also decreases (by x times)

The molarity of a solution is calculated by taking the moles of solute and dividing by the liters of solution.

$molarity \: = \frac{moles \: of \: solute}{litres \: of \: solution}$

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✔✔ MOLALITY ✔✔

It's a unit of the concentration of a dissolved substance, defined as

$mi \: = \frac{ni}{m \: solvent}$

where ni is the amount of the constituent (usually expressed in moles), and m solvent is the mass of just the solvent (usually expressed in kilograms). The quantity is usually expressed in terms of mol/kg.

The solvent is usually water, but it can also be another solvent (like an alcohol)

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# NIKKY

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Answer 2

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HERE IS YOUR ANSWER ☞
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Molerity, molality and normality are there different terms that are used to express the concentration of a solution
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☆ MOLARITY =>

● Molerity is defined as the number of moles of solute present per liter of solution .

thus,

$molarity \: = \: \frac{no. \: of \: moles}{volume \: of \: solution \: (in \: liters)} \\ \\ here \\ \\ no. \: of \: moles \: = \frac{mass \: of \: solute}{molar \: mass \: of \: solute}$

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☆MOLALITY =>

● molality is defined as the no. of moles of solute per kg of solvent.

thus,

$molality \: = \: \frac{no. \: of \: moles \: of \: solute \: }{mass \: of \: solvent \: (in \: kg)}$

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