Question

Calculate the mass percentageof aspirin and acetonitrile when 6.5g of aspirin dissolved.in 450g of acetonitrile

Answer 1

mass % of aspirin = (6.5/ 456.5) × 100

= 1.42%

mass % of acetonitrile = (450/456.5) × 100

= 98.58%



Thanks

Answer 2

Answer :

• Mass percentage of aspirin = 1.424%.

Step-by-step explanation :

Given that,

• Mass of solute, aspirin = 6.5 g.
• Mass of solvent, acetonitrile = 450 g.

$\hrulefill$

Mass of solution = Mass of solute + Mass of solvent

⇒ 6.5 g + 450 g

⇒ 456.5 g.

Now, we know,

$\rm{Mass\:\%\:of\:solute=\dfrac{Mass\:of\:solute}{Mass\:of\:solution}\times{}100}$

Putting the values, we get,

Mass % of solute aspirin =

$\implies\rm{\dfrac{6.5\:g}{456.5\:g}\times{}100}$

$\implies\rm{\dfrac{650}{456.5}}$

$\implies\bold{1.424\%.}$