Question

Using the following data, determine the percent composition (by mass) of the NaCl (salt) in a binary mixture. The mass of the unknown binary mixture is 23.76g and the mass of the SiO2 (sand) alone is 15.01g. Record your answer to 3 significant figures, and include the percentage sign ('%'), or 'percent'.

Answer 1

Answer: The percent composition (by mass) of the NaCl (salt) in a binary mixture is 36.8%

Step-by-step explanation:

Binary mixture is a mixture containing two components which are mixed together in any proportion and do not combine chemically with each other.

Mass of mixture=Mass of
`SiO_2`+Mass of
`NaCl` = 23.76 g

Mass of
`SiO_2` = 15.01 g

Mass of
`NaCl` = 23.76 g - 15.01 g =8.75 g

To calculate the mass percentage ,we use the formula:

`\text{Mass percent}=\frac{\text{Mass of} NaCl}{\text{Mass of mixture}}* 100`

Putting values in above equation, we get:

`{\text{Mass percent of} NaCl}=(8.75g)/(23.76g)* 100=36.8\%`

Thus the percent composition (by mass) of the NaCl (salt) in a binary mixture is 36.8%