• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

osmosis. Aim To find out how much salt should be added to water to keep potato chips as they were when first chipped.

Extracts from this document...

Introduction

Osmosis in Potatoes Aim To find out how much salt should be added to water to keep potato chips as they were when first chipped. Introduction & Theory Cells are surrounded by a cell membrane which has tiny holes in it. This is said to be partially permeable as it allows small molecules to pass through. Osmosis is the movement of water molecules from an area of high concentration (weak solution) to an area of low water concentration (strong solution) through a partially permeable membrane. Water actually moves both ways to try and even up the concentrations. If there is more movement one way we say there is a net movement of water into the area where there is less water. ...read more.

Middle

a hypertonic solution, they take in water by osmosis until they burst. (add something about blood cells and see fig 3) Figure 3 The concentration of the solution that surrounds a cell will affect the state of the cell, due to osmosis. There are three possible concentrations of solution to consider: * Isotonic solution a solution of equal concentration to a cell * Hypertonic solution a solution of higher concentration than a cell * Hypotonic solution a solution of lower or concentration than a cell The effects of these solutions on cells are shown in this diagram below. (Figure 4) Figure 4 Hypothesis ( need 3 short sentences) ...read more.

Conclusion

* Carefully dry the potato chips with a paper towel. * Measure and weigh each potato chip. * Place the potato chips in labelled test tubes with various salt solutions. * Time the submerged potato chips for exactly one hour. * Drain the potatoes and dry off with a paper towel. * Again measure and weigh each potato chip. * Record results on a table below. Results Test tube Salt (g) Original mass of potato before (g) (a) Mass of potato after (g) (b) Change in mass (g) (b) - (a) = (c) % change in mass (c) / (a) x 100 A 0.0 1.48 B 0.5 1.52 C 1.0 1.59 D 1.5 1.45 E 2.0 1.63 F 2.5 1.56 G 3.0 1.61 H 3.5 1.64 I 4.0 1.45 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Life Processes & Cells section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Life Processes & Cells essays

  1. Lab Research Paper. Just a Pinch of Salt and a Dash of Bacteria: the ...

    Salt Concentration Zone of Inhibition (in mm) 0% 14 0% 11 0% 13 1% 12 1% 11 1% 12 3.5% 10 3.5% 13 3.5% 10 7% 18 7% 11 7% 14 15% 13 15% 14 15% 20 25% 16 25% 13 25% 11 Figure 2.2: B. subtilis Day 2 Trial 1 Trial 2 Trial 3 Salt Concentration Zone of Inhibition (in mm)

  2. Osmosis is defined as 'the movement of water molecules from an area of high ...

    This was because, if I had weighed the potatoes with the bowl, then I would have to take the weight of the bowl away from that result. Table of results In the table below, it shows the 'solution´┐Ż column, which are the 6 different types of solutions.

  1. Stephen Blackpool: The Pathetic Figure.

    Slackbridge stimulates the workers' feelings and disunites the workers' relationship. The contrast between Slackbridge and Stephen' characters increase the sympathy to Stephen Blackpool. Slackbridge is cunning, not honest, not manly, not good- humored, but he is accepted among the workers and has influence on them by using their simplicity, innocence and desire for safe.

  2. Osmosis coursework. The aim of this investigation is to find the best concentration ...

    chips wont all absorb the same amount which will lead to a unfair test Shape of chips mass If one chip is bigger than the others it will absorb more than the others which will lead to inaccurate results By weighing the chips and making sure there are the same

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work