Question

In an experiment, a scientist adds an unknown powder to 1 liter of water until no more powder will dissolve. The scientist repeats this procedure for solutions at several temperatures. This data table shows the results.

Temperature Mass of powder that dissoles in 1L
of water
20°C 5.0g
30°C 5.0g
40°C 5.1g
50°C 5.0g

Which property of the powder is identified by the data?
a. Its texture decreases with temperature and volume.
b. Its solubility in water decreases with temperature.
c. Its mass decreases with temperature.
d. Its temperature decreases with its mass and the volume of the water.

Answer 1

The solubility of the powder in water does not significantly change with temperature. Therefore correct option is B

Step-by-step explanation:

The data in the table shows that as the temperature increases, the mass of the powder that dissolves in 1 liter of water remains mostly constant, with a slight increase at 40°C. This indicates that the solubility of the powder in water is not significantly affected by temperature, as the amount of powder that dissolves is consistent at different temperatures. Therefore, the property of the powder identified by the data is b. Its solubility in water decreases with temperature.