Aim To observe and measure the effect of osmosis on the mass of potato using a starch solution. Introduction In order to measure the effect of osmosis‚ eighteen pieces of potato were cut and placed in six groups‚ each group of three pieces cut to weigh as close as possible to one another. For each potato group‚ a test tube was half filled with a starch solution varying in concentration from 0% (water) to 1%. Hypothesis Through osmosis
Premium Organelle Cell Eukaryote
Osmosis of a Potato cell. Hypothesis is that the potato in saltwater is going to show that it will break down the cells of the potato. Osmosis is the diffusion of a solvent through a semi-permeable membrane‚ from a solution of low solute concentration to a solution with high solute concentration‚ up a solute concentration gradient. Net movement of solvent is from the less-concentrated to the more-concentreated.‚ which tends to redure the difference in concentrations. This effect can be countered
Premium Osmosis Cell wall
This was conducted through four different experiments. The first tested the effect of temperature on enzyme activity. The independent variable in the first experiment was the temperature of the solution of pH 7 buffer‚ potato juice‚ and the enzyme. The independent variable for the second experiment was the pH of the phosphate buffer. The independent variable for the third experiment was the enzyme concentration of the solution‚ and finally the independent variable of the
Premium Enzyme Chemical reaction Catalysis
B. Yeats‚ 1921 TEACHER ’S INTRODUCTION Between 1845 and 1850‚ more than a million Irish people starved to death while massive quantities of food were being exported from their country. A half million were evicted from their homes during the potato blight‚ and a million and a half emigrated to America‚ Britain and Australia‚ often on-board rotting‚ overcrowded "coffin ships". This is the story of how that immense tragedy came to pass. The necessary historical and political context for a
Premium Ireland Great Famine Irish diaspora
Aim: What is the effect of changes in sucrose concentrations on the water potential of potato cells? Raw Data: Suscrose concentration (0.00M) Group 1 Group 2 Group 3 Group 4 Change in mass (g) (+/-0.1g) 0.04 0.19 0.10 -0.27 Change in length (mm) (+/- 0.1mm) 0.00 0.00 0.00 0.30 Suscrose concentration (0.10M) Group 1 Group 2 Group 3 Group 4 Change in mass (g) (+/-0.1g) 0.29 0.44 0.22 0.08 Change in length (mm) (+/- 0.1mm) 1.10 0.30 0.30 0.70
Premium Standard deviation
Firstly‚ both Heaney and Waterhouse have used figurative language to animate how the young boy in each of their poems admires his father or grandfather. In ‘Follower’‚ Heaney starts off by comparing his father’s ‘globed’ shoulders to a ‘full sail strung’- across some sort of boat. Other sailing imagery is also used throughout the poem. For instance‚ ‘mapping the furrow exactly’ and ‘i stumbled in his hob-nailed wake’‚ where the poet’s father is juxtaposed with a sea captain and a boat‚ respectively
Premium Poetry English-language films Seamus Heaney
Hi‚ Sarah; I’m Wanda‚ your tutor for today’s session. I understand that you’d like comments regarding Introduction/Conclusion‚ but there are some more pressing needs for this draft. After you have revised the essay‚ please resubmit and ask for this kind of feedback under “Describe the kind of help you would like from the tutor.” Tell the tutor that this is a second submission and explain what you revised from the first draft. Essay Summary You are writing an essay about tattoos and body piercings
Premium Body modification Body piercing Body art
aspects of the wells and variety in pleasures to both symbolize as well as introduce his theme. Many times when referring to his adventurous endeavors with wells‚ Heaney uses diction greatly to voice his exact reflection of his experience which helps illuminate both the theme and symbols respectively. Aside from those three devices‚ Heaney provides insight from his youth which helps readers try to assimilate a similar situation or age in one’s life. Clearly used in the first line‚ “As a child‚ they
Premium Learning Psychology Thought
variables are the potato and onions. The dependent variable is the variable whose value is measured to determine the extent of the effect of another variable to it‚ as in an experiment. In osmosis lab‚ the dependent variable is the length of the potato. The controlled variables are the amount of water‚ amount of salt‚ and the size of the potato. If the potato is placed in a higher salt concentration‚ then the potato will decrease its size. We started the lab by cutting the potato core length (44
Premium Concentration Osmosis Chemistry
had two sized potatoes‚ 6g and 10g‚ and placed each in three different dilutions of sucrose at 0.5M‚ 0.1M‚ and 0.05M. We also placed a 6g and 10g potato piece in water to act as a control. Based on the weight percent change over 60 minutes‚ the 6g potato piece had faster water movement than the 10g. This confirms out hypothesis that smaller potato pieces will have a faster rate of water movement. Introduction Osmosis is the diffusion of water across a selectively permeable membrane. Water
Premium Chemistry Concentration Osmosis