Question

The mass of the evaporating dish was 22.45 g. The evaporating dish and mixture was 33.62 g. The mass of the evaporating dish and sand was 25.46 g. The mass of 2nd

evaporating dish was 23.46. The mass of the 2nd evaporating dish and dry salt was 25.83
g. What are the mass percentages of the components?

Answer 1

The mass percentage of the evaporating dish is 66.2%.

The mass percentage of the mixture is 33.8%.

The mass percentage of the sand is 60.6%.

The mass percentage of the dry salt is 39.4%.

Answer 2

The mass percentages of the components in the mixture are 26.95% for sand, 21.23% for dry salt, and 51.82% for water, after subtracting the mass of the empty dishes from the total and calculating each component's proportion.

Step-by-step explanation:

To calculate the mass percentages of the components in a mixture, you need to use the mass of the components and the total mass. From the data provided, we can find the mass of each component and then calculate their respective mass percentages in the mixture.

Mass of the empty first evaporating dish: 22.45 g

Mass of the first evaporating dish and mixture: 33.62 g

Mass of the first evaporating dish and sand: 25.46 g

Mass of the empty second evaporating dish: 23.46 g

Mass of the second evaporating dish and dry salt: 25.83 g

First, subtract the mass of the empty evaporating dish from the combined masses to find the mass of the mixture and then its individual components.

Mass of the mixture (first dish): 33.62 g - 22.45 g = 11.17 g

Mass of the sand: 25.46 g - 22.45 g = 3.01 g

Mass of dry salt (second dish): 25.83 g - 23.46 g = 2.37 g

To find the mass of the solvent (water), we subtract the mass of the sand and the dry salt from the mass of the mixture.

Mass of the water: 11.17 g - (3.01 g + 2.37 g) = 5.79 g

Now we can calculate the mass percentages:

Percentage of sand: (3.01 g / 11.17 g) × 100% = 26.95%

Percentage of dry salt: (2.37 g / 11.17 g) × 100% = 21.23%

Percentage of water: (5.79 g / 11.17 g) × 100% = 51.82%