Question

A solution is prepared by dissolving 49.3 g of KBr in enough water to form 473 mL of solution. Calculate the mass % of KBr in the solution if the density is 1.12 g/mL.

Answer 1

9.31%

Step-by-step explanation:

We are given that

Mass of KBr=49.3 g

Volume of solution=473 mL

Density of solution =1.12g/mL

We have to find the mass% of KBr.

Mass =
`volume* density`

Using the formula

Mass of solution=
`1.12* 473=529.76 g`

Mass % of KBr=
`(mass\;of\;KBr)/(Total\;mass\;of\;solution)* 100`

Mass % of KBr=
`(49.3)/(529.76)* 100`

Mass % of KBr=9.31%

Hence, the mass% of KBr=9.31%