→ Biology - Osmosis Potato Practical → Start Learning / Flashcards Téléchargement MP3

question		réponse
What was the aim of the osmosis potato practical? commencer à apprendre		To investigate the effect of different concentrations of sugar / salt solutions on the mass of potato tissue.
Why is a cork borer used? commencer à apprendre		To cut potato cylinders of the same size.
Why must the potato cores be the same size? commencer à apprendre		To make the test fair and results reliable.
Why is paper towel used in the experiment? commencer à apprendre		To remove excess liquid before measuring mass.
What is the control in this experiment? commencer à apprendre		Potato core placed in distilled water.
What happens to the potato cells in distilled water? commencer à apprendre		They gain mass because water enters the cells by osmosis.
What happens to potato cells in concentrated sucrose solution? commencer à apprendre		They lose mass because the water leaves the cells by osmosis.
What equipment is used to measure potato mass? commencer à apprendre		A top-pan balance accurate to at least 0.01g.
How do you calculate percentage change in mass? commencer à apprendre		Percentage change=final mass - initial mass / initial mass x 100
Why must onion skin be thin? commencer à apprendre		So light can pass through it and individual cells can be seen

Biology - Osmosis Potato Practical