potatoes and different sucrose concentrations (0.15‚ 0.20‚ 0.25‚ 0.30‚ 0.35 and 0.50). It was expected that the potatoes would lose weight as the potatoes would have lower water potential when placed in a solution ‚ and in this can be taken from the theory of osmosis which states that “the passive diffusion of water molecules across a selectively permeable membrane down a concentration gradient” (Taylor and Bruenn‚ 2009)‚ moving water from a high to a low concentration‚ so in this case water would
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In this essay I am going to explore what happens in the book of Exodus in the Old Testament. I will also go on to further explain why this event is so significant for the Jewish people. This helps to explain why what happened in Exodus is still remembered and celebrated by those of Jewish faith today all over the world and why it is described as the most significant event in Jewish history. In an introduction to Christian theology‚ Towey discusses the importance of the Exodus “The subsequent account
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In the experiment‚ as the size of the cube decreased‚ the absorption rate increased‚ showing that the smaller cells absorbed more sodium hydroxide than bigger cells. The smaller cells were able to absorb more sodium hydroxide as they have a bigger surface area to volume ratio causing them to act more efficiently than the bigger cells. The smallest cell had a ratio of 1:12 while the biggest cell had a ratio of 1:2‚ leaving a gap of 5:12 causing the bigger cell to act less efficient in absorbing the
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Starvation in the ghettos/ Concentration camps Did you know that people in Concentration camps not only got diseases but also starved to death? Firstly‚ we need to know what the Concentration camps were like so we know the conditions they went through. Secondly‚ we need to know how much food they got per day and how much carbs and fattening foods they got. Lastly we need to know why the Nazis starved the Jews when they were at the camps. Firstly‚ the Ghettos were your worst nightmare. They were blocked
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factors of a chemical reaction affect the rate of reaction. This experiment focused on how temperature affects the rate of reaction for the reaction of alka-seltzer and water. The rate of a reaction is a value calculated to figure out how fast a chemical reaction occurs. There are three factors that can be changed that will affect the rate of a chemical reaction: surface area‚ concentration‚ and temperature. Temperature specifically affects the rate of a chemical reaction‚ because when the temperature
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cross on the child’s forehead and the parents and God-parents do the same. The sign of the cross is a symbol that the child now belongs to God. The people then enter into the church. There is then a short reading form the Bible. The priest explains what it is about. Then there will be prayers. The prayers will be for the baby and for the parents and God-parents to help them in their job of bringing up the child. The priest anoints the child on the chest with the oil of catechumens. Think of a wrestler
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Introduction “The Enzyme Reaction” An enzyme is a protein that acts as a catalyst‚ which brings out a biochemical reaction. A Catalase enzyme‚ the enzyme tested in this experiment‚ is found in almost all living organisms that are exposed daily to oxygen (such as fruits‚ vegetables and animals). Background Information The Catalase enzyme in this experiment is known for being less affective the warmer the temperature is. According to “Science fair projects” an enzyme becomes unstable
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THE EFFECT OF CONCENTRATION ON REACTION RATE INTRODUCTION • Concentration is one factor which has an effect o the rate of a chemical reaction. In chemistry we describe concentration in terms of the number of moles of a substance there are in every cubic decimetre (litre) of solution‚ written as moles.dm-3 of M for short. • In this experiment you will find out how increasing the concentration of the acid solution changes the rate of the reaction between dilute hydrochloric acid and magnesium
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out so that tubes containing a reaction solution of the Amylase enzyme and starch were simultaneously mixed. The reactions were then introduced to I2-KI‚ which stopped the reactions‚ at two minute intervals. Each of these trials was repeated three times to ensure proper accuracy. After concluding the reactions they were placed into a spectrophotometer (A580) for analysis. Graphing the values of the absorbance to time for each pH it was found that the rate of reactions in the neutral pH solutions were
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strong acid ionises completely while a weak acid only ionises partially. Furthermore‚ the strength of the acid will also have an effect on the rate of the reaction. A strong acid will have a faster reaction then
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