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Osmosis in plant hypothesis
The effect of osmosis in the potato
Osmosis of potatoes
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Find out what affect the change of concentration in the sucrose solution
has on the mass of a potato chip.
Introduction
In this experiment I will be taking five similar potato chips and
putting them into different sucrose solutions (each one with a
different concentration) and observing the effect that each
concentration has on the size of the potato chip.
Aim
I am doing this investigation in an endeavour to find out what affect
the change of concentration in the sucrose solution has on the mass of
a potato chip.
Background information
Ø Osmosis is the movement of water molecules across a partially
permeable membrane from an area with high concentration to an area
with low concentration
Ø The opposite of osmosis is active uptake, this is when water moves
from an area with a low concentration to an area with low
concentration. An example of this would be a root hair cell getting
water from its surroundings.
Ø Partially permeable membranes have holes in them. These holes are
the size of just one water molecule.
Ø Water can pass through the membrane in both directions although if
there is a higher concentration of water in the solution rather than
the potato chip, the potato chip will receive water molecules and will
increase in size.
Ø Some membranes in plant and animal cells allow only certain
particles to pass through them. They are partially (or selectively)
permeable.
Prediction
I predict that as the concentration of the sucrose solution decreases
the mass of the potato chip will increase. I think this because a
lower sucrose content would mean a higher water content and therefor
as osmosis takes place the water in the solution will move from the
solution to the potato chip and as a result increasing the mass of the
potato chip.
I also predict that the concentration of the solution and the mass of
the potato chip will be directly proportional to each other.
Variables
In this investigation I will change the concentration of the solution
and I will be keeping the size of the potato and the temperature of
the solution the same.
Equipment
Below is the apparatus that I will be using for my investigation.
Ø Stop watch
Ø Cutting tile
Ø Small knife
Ø Measuring cylinder
Ø Distilled water
Ø sucrose
Ø Potatoes
Ø Weighing scale
Ø Potato cutter
Ø Cling film
Ø Ruler
Method
Ø Firstly I will cut five pieces of potato.
Ø Then I will peal the potatoes with the knife.
Ø After this I will measure and weigh them to ensure that they are
equal.
Ø Subsequently I will put 40ml of my solution in each of the testubes.
Test tube one will have 10ml of distilled water and 30ml of sucrose.
CL-, as the ions of H+ and OH- react to form H2O. These spectator ions
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Investigating the Effect of Sucrose Concentration on the Conversion into Glucose and Fructose by Invertase
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It is important however to note that the NH4 and K ions are still in
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Flags have been around for centuries and are full of symbolism. From the 13 stripes to the 50 stars our United States flag has always represented freedom. In this symbolism, there is an underlying tone of civil disobedience that has lasted through history and now lives on in the form of another flag.
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Equipment Potato, Borer, Beakers, Measuring Cylinder, Stopclocks, Distilled Water, Electronic Balance, Salt solutions of various concentrations. Diagram [IMAGE] [IMAGE] [IMAGE] When we leave the potato in the solution for the allocated time, water