Question

5 gm of salt is dissolved in 125 gm of water at 298K.Calculate it's percentage concentration

Answer 1

Answer:

$\bigstar{\bold{Mass\%\:of\:solute\:=\:3.85\%}}$

Explanation:

$\Large{\underline{\underline{\bf{Given:}}}}$

• Mass of solute (salt) = 5gm
• Mass of solvent(water) = 125gm

$\Large{\underline{\underline{\bf{To\:Find:}}}}$

• Percentage concentration of solute

$\Large{\underline{\underline{\bf{Solution:}}}}$

→ Percentage concentration is given by the formula

  Mass% = (Mass of solute/Mass of solution )×100

→ Mass of solution = Mass of solute+Mass of solvent

→ Substituting the given datas, we get

  Mass% = (5/5+125)×100

  $\boxed{\bold{Mass\%\:of\:solute\:=\:3.85\%}}$

$\Large{\underline{\underline{\bf{Notes:}}}}$

• Mass percentage of the solute is the mass of the solute divided by given mass of solution multiplied by 100.