Question

Mass percentage concentration 100gm salt soloution Which contain 20gm of salt

Answer 1

Given :

➾ Mass of solution = 100g

➾ Mass of salt = 20g

To Find :

➳ Mass percentage conc. of the solution.

Solution :

◕ Name : Mass percentage

◕ Symbol : %(w/W)

◕ Definition : Amount of solute in grams present in 100g of solution.

◕ Effect of temperature : No

◕ Formula :

$\bigstar\:\underline{\boxed{\bf{\purple{\%\dfrac{w}{W}=\dfrac{Mass\:of\:solute}{Total\:mass\:of\:solution}\times 100}}}}$

• mass of solute = 20g
• mass of solution = 100g

⇒ %(w/W) = w/W × 100

⇒ %(w/W) = 20/100 × 100

⇒ %(w/W) = 20%

Answer 2

Given :

mass of solution = 100 g

mass of solute = 20 g

Solution:

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

= (20/100) ×100

= 1/5 × 100

= 100/5

= 20 %

Answer:

20 %