Answer:
This question is incomplete
Explanation:
This question is incomplete but the missing table of the question is attached in the document below.
To determine the percentage change in mass, the formula below is used
(mean mass after soaking - mean mass before soaking)/mean mass before soaking × 100
Thus, for the last concentration (200 g/dm³) that wasn't calculated
(175 - 183)/183 × 100 = -4.4
The reason for calculating the percentage change in mass of the onions is to know if an increase in concentration of sodium chloride leads to an increase or decrease in size of onions. And from the result, the increase in concentration of the sodium chloride solution led a decrease in size of the onion (thus the reason for the negative sign of the percentage as the concentration increases).
Calculating the percentage mass difference will help student to plot a graph. The percentage change in mass in most concentrated solution is -4.4%.
Osmosis:
It is the process by which solvent molecule move from its high concentration to its low concentration via a semipermeable membrane.
The percentage change in mass can be calculated using the formula,
[tex]\bold {M = \frac{Mf - Mi}{Mi \times 100} }[/tex]
Where,
M - mass percentage
Mf - Mi - change in mass
Mi - initial mass
For most concentrated solution,
Mass difference = 8
[tex]\bold {M =\frac{ 8}{183} \times 100}} \\\\\bold {M = -4.4}[/tex]
The percentage change in mass in most concentrated solution is -4.4%.
They calculated the percentage mass difference to show the change in mass after putting into the solution.
Therefore, the increase in the concentration of the solution, decrease the final mass of onion.
To know more about osmosis, refer to the link
https://brainly.com/question/16798513
