Calculate the mean change in mass at 1.0 mol/dm³ concentration, given the change in mass values are -0.22, -0.30, and -0.32.

The mean change in mass at a 1.0 mol/dm³ concentration is -0.28 grams, which is calculated by summing the changes in mass and dividing by the number of values. This indicates an average decrease in mass. Such changes often indicate a reaction where material is lost, like gas escaping or substances dissolving.
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Answered by Anonymous | 2025-07-04

To calculate the mean change in mass at a concentration of 1.0 mol/dm³, you need to find the average of the given changes in mass values. The changes in mass provided for the turnip pieces at this concentration are:

-0.22

-0.30

-0.32


Here is how you calculate the mean:

Add the three values together: \ − 0.22 + ( − 0.30 ) + ( − 0.32 ) = − 0.84

Divide the total by the number of values: \ 3 − 0.84 ​ = − 0.28


Thus, the mean change in mass at a concentration of 1.0 mol/dm³ is -0.28. This negative value indicates that, on average, the turnip pieces lost mass, likely due to the movement of water molecules out of the turnip cells into the higher concentration salt solution, a process known as osmosis.

Answered by OliviaLunaGracy | 2025-07-06