Direction and concentration gradients Bradley Benton ABSTRACT In this experiment‚ we will investigate the effect of solute concentration on osmosis. A semi‐permeable membrane (dialysis tubing) and sucrose will create an osmotic environment similar to that of a cell. Using different concentrations of sucrose (which is unable to cross the membrane) will allow us to examine the net movement of water across the membrane. INTRODUCTION A major determinant of diffusion in a biological system is membrane
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Affecting Rates of Chemical Reactions Prepared By: Kelly Gunter For: Ms. Brohman Course: SCH-4U Introduction The main purpose of this lab was to investigate how temperature‚ concentration‚ the addition of catalysts‚ and the substitution of a more reactive reactant‚ can affect the reaction. The collision theory explains that in order for a reaction to occur‚ reacting particles must collide with one another. An effective collision makes reactants result in a reaction and for to
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and is characterized by certain soil climate conditions and particular assemblages of plants and animals. Not all species live in every biome they vary in their adaptations to different conditions. An adaptation is an inherited characteristic that increases an organism’s ability to survive and reproduce. These sorts of variations in plants and animals help different species survive under different conditions in different biomes. Plants and animals also exhibit variations in tolerance‚ or ability and
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Virtual Lab: Enzyme Controlled Reactions Worksheet 1. Which of the following does NOT apply to an enzyme: Inorganic 2. When an enzyme catalyzes a reaction: Substrate(s) bind in the active site 3. Which of the following would interfere most with the ability of an enzyme to catalyze a reaction? Reduced concentration of substrate available 4. Feedback mechanisms regulate the rate of enzyme activity‚ effectively “turning off” an enzyme
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Solute Concentration of Potatoes Block 2-2 Purpose: To determine the concentration of solute in the potato’s cytoplasm by measuring the change in mass after the process of osmosis. Materials and Equipment: Refer to Biology 12 Lab Manual – Investigation 13 Procedure: Refer to Biology 12 Lab Manual – Investigation 13 Data and Observations: The Potatoes change in mass after the process of Osmosis Test Tube # | Concentration of Sucrose
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Shayne Laidler Barnes What would happen if marijuana were legalized tomorrow? As the New Year comes so do new laws‚ especially those that have to do with medical and recreational use of marijuana in the United States. As our social and political landscapes are rapidly changing more and more states are passing pro-medicinal marijuana legislation. Currently there are 17 states that approved of pro-marijuana ballot initiatives‚ but not all of them have officially approved cannabis for medical use
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The Rate of a Reaction Chemical Kinetics is the area of Chemistry that is concerned with the speed‚ rate or mechanism at which a chemical reaction occurs. Reaction Rate is the change in the concentration of a reactant or product with time (i.e. M/s). It measures how fast a reactant is consumed and how fast a product is formed. 1.2 WRITING RATE EXPRESSIONS Consider the following hypothetical reaction. A + 2B ( 3C + D Rate = - rate of consumption of A = -[pic]rate of
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INITIAL PROBLEMS FACED AFTER THE CREATION OF PAKISTAN INTRODUCTION: Pakistan came into existence on 14th august 1947. Soon after its establishmentPakistan faced number of problems. Most of the problems of Pakistan were related withPakistan dispute with India‚ such as the accession of the princely states‚ canal Water dispute‚ refugees’ problems and distribution of armed and military assets. Infect most of these problems were deliberately created by India itself so that Pakistan would notmaintain its
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What about Bob? Reaction Paper The movie‚ What About Bob‚ was about a man who suffered from several psychological issues‚ in which he sought therapy from a psychiatrist. Bob‚ the main characters name‚ had many phobias as well as anxiety and social disorders. This caused Bob to seek constant attention from his psychiatrist‚ including lying to the operator saying that he was a detective to obtain his psychiatrist’s address. Toward the end of the film Bob had a break through while his life was
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Determine the order of the reaction A --> 2B + C from the following data obtained for [A] as a function of time. time | [A] | 0 min | 0.80 M | 8 mins | 0.60 M | 24 mins | 0.35 M | 40 mins | 0.20 M | ------------------------------------------------- Use diferential and half life. 2. Balance the equation below and determine the rate expression using the given data. Find k with units. N2 + H2 ---> NH3 (all gaseous) [N2] (mole/L) | [H2] (mole/L) | Initial Rate (mole/L /min) | 0.10
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