Question

A chemist mixes 75.5g of of acetone with 26.1g of of thiophene and 22.7g of acetic acid.
1. Calculate the percent by mass of each component of this solution. Be sure each of your answer entries has the correct number of significant digits.

Answer 1

Answer:

%Acetone = 60.7%

%Thiophene = 21.0%

%Acetic acid = 18.3%

Explanation:

Given data

• Mass of acetone: 75.5 g

• Mass of thiophene: 26.1 g

• Mass of acetic acid: 22.7 g

The total mass is:

Total mass = Mass of acetone + Mass of thiophene + Mass of acetic acid

Total mass = 75.5 g +26.1 g + 22.7 g = 124.3 g

We can find the percent by mass of each component of the solution using the following expression.

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

Acetone

%Acetone = (75.5 g/124.3 g) × 100%

%Acetone = 60.7%

Thiophene

%Thiophene = (26.1 g/124.3 g) × 100%

%Thiophene = 21.0%

Acetic acid

%Acetic acid = (22.7 g/124.3 g) × 100%

%Acetic acid = 18.3%

Answer 2

Answer:

75.5g of of acetone = 60.7%

26.1g of of thiophene = 21.0%

22.7g of acetic acid = 18.3%

Explanation:

From the data guven above, the mass of the individual component that made up the solution is given below:

75.5g of of acetone

26.1g of of thiophene

22.7g of acetic acid

Mass of solution is the summation of the mass of the individual components.

Mass of solution = (75.5 + 26.1 + 22.7)g

Mass of solution = 124.3g

%mass of acetone = (mass of acetone/mass of solution) * 100

= (75.5/124.3) * 100

= 60.7%

%mass of thiopene = (mass of thiopene/mass of solution) * 100

= (26.1/124.3) * 100

= 21%

%mass of acetic acid = (mass of acetic acid/mass of solution) * 100

= (22.7/124.3) * 100

= 18.3%