After the experiment the students noticed that the potato stick with the lowest mass was soft. (c) Explain why the potato stick had become soft.
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After the experiment potato stick had become soft :
Cylinders or discs of fresh potato are often used to investigate osmosis in living cells.
Osmosis in potatoes
cut equal-sized pieces of potato.
blot with tissue paper and weigh.
put pieces into different concentrations of sucrose solution for a few hours.
remove, blot with tissue paper and reweigh.
The process that happens to both potato slices is called osmosis, which is a diffusion of water across the semipermeable membrane the potato slice cells possess. ... The water will diffuse into the cells of the potato, causing them to swell; the cells may be characterized as being "turgid", or swollen.
Thus this softening of potato stick is due to OSMOSIS
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