Question

Calculate the molarity of 50gm of NaCL dissolve in 500cm cube of solution.​

Answer 1

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As Molarity= moles of solute/ volume of solution(liters)

As Molarity= moles of solute/ volume of solution(liters)     M=  5.85*1000/((23+35.5)*500)=0.2M

Answer 2

Given:-

→ Mass of NaCl [solute] = 50 gm

→ Volume of solution = 500 cm³

To find:-

→ Molarity of the solution.

Solution:-

• Molar mass of Sodium (Na) = 23 g/mol

• Molar mass of Chlorine (Cl) = 35.5 g/mol

Hence, molar mass of NaCl :-

= 23 + 35.5

= 58.5 g/mol

Number of mole in 50g of NaCl :-

= Given Mass/Molar mass

= 50/58.5

= 0.855 mole

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Now, let's convert the volume of the solution from cm³ to L .

⇒ 1 cm³ = 0.001 L

⇒ 500 cm³ = 500(0.001)

⇒ 0.5 L

Molarity of a solution :-

= Moles of solute/Liters of solution

= 0.855/0.5

= 1.71 M

Thus, molarity of the solution is 1.71M .