Essays on Concentration

Enzyme concentration
Words • 905
Pages • 4
If the temperature is too high then the enzyme will denature. This means that the active site will be damaged, and will no longer fit with the substrate. This means that no reaction will occur. pH Independent - If the pH is very different to an enzymes optimum pH then the enzyme can be denatured as the hydrogen ions (of which pH is a measure) can interact with the amino acid R groups and affect the way they bond with…...
ConcentrationEnzyme
Rates of reaction between sodium thiosulphate and hydrochloric acid
Words • 962
Pages • 4
Tom - this is good, in that it's all there. But it's muddled - again, I don't think you've really gone away from it and then come back fresh, and read it through to see if it makes sense. There's no point submitting work until you have. My comments are in italics You need to explain the chemistry behind the theory - it will be in your textbook I imagine Rates of reaction between sodium thiosulphate and hydrochloric acid Aim…...
ConcentrationSodium
The effect of changing the concentration of a reactant upon the rate of a reaction
Words • 829
Pages • 4
This investigation is appropriate for a general or first-year college-prep course. The effect of changing the concentration of thiosulfate ion is studied by observing the time required for a fixed amount of product to form. As the reaction proceeds, the solution becomes cloudy due to the formation of a colloidally dispersed precipitate of sulfur. In order to determine the point at which a specific amount of product has formed, an "x" is observed through the solution. The reaction is timed…...
Concentration
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Investigating the Water Potential of Root Vegetables
Words • 2409
Pages • 10
For my experiment I will be investigating the water potential of root vegetables. The vegetable I am going to use is turnip. I am going to use turnip because it is a uniform vegetable. This investigation is about osmosis. "Osmosis is the net movement of water molecules from an area of high water potential to an area of low water potential. This takes place through a partially permeable membrane." Water potential is the potential energy of the water molecules on…...
ConcentrationOsmosisWater
Finding Concentration of a Solution
Words • 1711
Pages • 7
Jason Yu (Block C) Research Question Which of the following methods give a value of NaOH concentration closest to the 'real' value1? 1. Weighing the solute, 2. Titrating it 1. No literature value available, we need to find by most accurate method Data Collection: Method A (Weighing NaOH) Quantitative Data: Method A: Weighing NaOH Mass of NaOH pellets (zeroed beaker) = 0.412 � 0.001 g Volume of standard solution = 100.0 � 0.5 cm3 Qualitative Data: On electronic balance: Two…...
Concentration
How different concentrations of the enzyme pectinase affect the degradation of the substrate pectin
Words • 6736
Pages • 27
Aim: My aim is to find out how different concentrations of the enzyme pectinase affect the degradation of the substrate pectin, and hence the volume of clarified apple juice produced in a specific duration of time. Hypothesis: Will different enzyme concentrations have different effects on the yield of clarified apple juice obtained from apple pulp of equal masses, in a given time? Biological Knowledge: Enzymes are a class of proteins, which are biological catalysts responsible for speeding up and controlling…...
ConcentrationEnzyme
Determine the concentration or molarity of Ethanoic acid
Words • 1987
Pages • 8
The aim of this investigation is to determine the concentration or molarity of Ethanoic acid (CH3COOH) in two types of commercial vinegar. To set about this, values of percent by mass have been noted from the internet and the modal value for this was 5%. The concentration can be calculated from percentage by mass by doing this: 5% ethanoic acid in vinegar can be interpreted by saying that it is the same as 5 grams of acid per every 100…...
Concentration
How the concentration of acid affects the rate of reaction
Words • 3409
Pages • 14
An investigation to find out how the concentration of acid affects the rate of reaction between hydrochloric acid and calcium carbonate (marble chips) Planning The aim of my investigation is to find out how changing the concentration of acid affects the rate of the reaction between CaCO3 and HCl. To make my experiments fair tests, I will only change one variable: the concentration of the acid. I will have to keep the volume of the acid, the mass and size…...
Concentration
Comparing the Concentration of Some Alkalis in Saturated Solutions
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Pages • 7
When metals from groups one and two of the periodic table combine with an OH molecule, the type of intramolecular bonding is ionic bonding. The metals lose one or more electrons and so become positively charged. The non-metal ions/ molecules gain electrons and so become negatively charged. The oppositely charged ions attract each other to form a rigid 3-D lattice a. Each ion in the lattice is surrounded by others of opposite charge e.g. NaOH: Due to their polar nature,…...
Concentration
How Does Changing the Concentration Of Hydrochloric Acid Affect the Speed It Reacts With Marble Chips?
Words • 650
Pages • 3
I am going to see if changing the concentration of acid affects the speed at which it reacts with marble chips. Marble chips + Hydrochloric acid ( Carbon dioxide + Water + Calcium chloride CaCO3 + HCl ( CO2 + H2O + CaCl2 I will measure how much gas is given off by using a tally counter to count how many bubbles of gas are given off and measuring the volume of gas produced. Diagram: Apparatus: 5g medium marble chips…...
ConcentrationSpeed
Concentration of Catalase Report Final
Words • 1815
Pages • 8
The Effect of Concentration of the Catalase Research Question: Does the concentration of liquid catalase affect the amount of oxygen gas produced?Rationale Many variables can be implemented to increase the rate of a chemical reaction. The presence of an enzyme can be used to help aid in increasing the rate of reaction. The type of enzyme being investigated is the catalase in its liquid form. The purpose of the liquid catalase of any enzyme is when it reacts with hydrogen…...
ConcentrationEnzymeOxygen
Death And Concentration Camps In The Holocaust History
Words • 1378
Pages • 6
The Holocaust was a horrifying crime against humanity. Adolf Hitler led a nation of Germans who were trying to rid “inferior races”. Hitler had a “final solution” to take care of anybody who he saw as inferior. “The plans included in the Final Solution included the deportation, exploitation, and eventual extermination of European Jews”. (Grobman) His method was to kill any undesirables. He would use concentration camps and death camps. Within the years 1941-1945 over eleven million people were killed.…...
ConcentrationConcentration CampsDeathHistoryNazi GermanyThe Holocaust
Concentration of HCL affecting surface area to vol ratio
Words • 1324
Pages • 6
The research question that this report is going to discuss is “What is the relationship between concentration of hydrochloric acid (HCl) and the rate of diffusion? ” My hypothesis for this research question is that change in rate of diffusion will be observed when the agar blocks are placed in solutions of different concentrations of HCl. As the concentration of HCl increases, the rate of diffusion will also increase due to the steeper concentration gradient created. To investigate the change…...
Concentration
The rate of reaction between sodium thiosulfate and hydrochloric acid
Words • 1958
Pages • 8
* Research question: Does the change in concentration of sodium thiosulfate and the fixed concentration of hydrochloric acid result a change in time taken for the yellow sulfur precipitate to form, thus lead to a change in time taken for the cross to disappear and the rate of reaction? * Variables: * Independent variable: The concentration of sodium thiosulfate / M. * Dependent variable: The time taken for the cross to disappear / second. * Controlled variables: * The concentration…...
ConcentrationSodium
Determining the of the Effect of the Concentration of Na2S2O3 on the Rate of Reaction
Words • 1533
Pages • 7
In this experiment we reacted different concentrations of Na2S2O3 (aq) with a constant volume of HCl, and measured the time it took for the X drawn under the beaker in black marker to disappear. Uncertainty Details: The uncertainty in the volume of Na2S2O3 (aq) and H2O (l) is given by manufacturer of the burettes. As we find the change in the volume in the burette, the uncertainties are added, and the uncertainty in the volume is ±0.1cm³ The uncertainty in…...
Concentration
To study the effect of dilution
Words • 1067
Pages • 5
Objective: To study the effect of dilution, concentration of water and temperature on the rate of the chemical reaction between methanal (HCHO), sodium sulphite (Na2SO3) and sodium hydrogensulphite (NaHSO3). Chemicals: 0. 3 M methanal about 100 cm3 solution B (containing 0. 20 M NaHSO3 and 0. 05 M Na2SO3) about 100 cm3 phenolphthalein indicator several dropping bottles shared Apparatus: Boiling tube x 6 100 cm3 beaker x 2 Glass rod x 1 250 cm3 beaker x 1 stop watch x…...
ChemistryConcentrationNatureScienceWater
Effect of Hydrogen Peroxide Concentration on Enzyme Catalase
Words • 625
Pages • 3
Indroduction: Enzymes are proteins. They function as biological catalysts. They lower the energy barrier of a reaction so that the reaction can take place at body temperature. Also, they can speed up Metabolic reactions without being changed or used up. During a reaction, an enzyme molecule combines temporarily with the substrate. When the reaction is complete, the enzyme molecules returns to its original dorm and the product is released. So enzymes are never wasted and always recycled. Due to enzymes…...
ConcentrationEnzymeHydrogen
Osmolarity: Concentration and Sucrose Solutions
Words • 1947
Pages • 8
My group and I conducted the experiment that estimates osmolarity by change in weight of potato tubers, this was conducted in order to explore the process of diffusion and osmosis and more importantly to investigate the question of “Does different concentrations of sucrose solutions have an effect on the final weight for the potato tubers?” In this experiment we estimated the osmolarity of potato tuber cores by submersing different potato cores into sucrose solutions of 0.0-0.6M, and weighing the potato.…...
ConcentrationOsmosis
Osmosis and celery lab experiment
Words • 985
Pages • 4
Diffusion is simply the net movement of atoms or molecules from a region of higher concentration to a region of lower concentration. The force behind the movement is heat or kinetic energy (also called Brownian motion). Diffusion occurs when you spill water on the carpet floor and it spreads out, or when you open a bottle of perfume and it leaves the bottle and spreads throughout the air in the room. Osmosis is a similar phenomenon that moves water from…...
ConcentrationExperimentOsmosis
The Effect of Glucose Concentration
Words • 922
Pages • 4
INTRODUCTION: Yeast, also known as a saccharomyces cerevisiae, is single celled eukaryotic cells that are in the kingdom fungi and are unicellular organisms which normally reproduce asexually by budding at a very high rate. Scientists quite often decide to work with yeast because of its features fast growing rate and the fact that yeast's DNA can be easily manipulated. Some types of yeast can be found naturally on plant or in the soil. Also it is worthwhile mentioning that yeast…...
ConcentrationGlucose
Sedimentation: Tangent and Concentration
Words • 2860
Pages • 12
Sedimentation is the process of separating a liquid mixture of suspended particles into clear supernatant liquid and denser slurry having a higher concentration of solids. This is usually accomplished by allowing the particles to settle through the force of gravity, mechanically using centrifugal force, or electrostatically using an electric current. Continuous sedimentation tanks are usually used in wastewater treatment facilities to separate suspended particles from wastewater. This experiment aims to determine the effect of initial concentration and initial height of…...
Concentration
The effect of different concentrations of glucose on anaerobic respiration in yeast cells
Words • 435
Pages • 2
Apart from substrate concentration, which I will be changing in this experiment, it is important to keep the other variables the same to ensure the results are reliable and to get a fair test – results must change because of a difference in the input variable, not because of a different variable. I can monitor the temperature and check it stays the same by using a thermometer. I can keep the pH the same by always using water from the…...
Anaerobic RespirationCellConcentrationGlucose
Comparison of concentration camps to japanese internment
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Pages • 4
Although we cannot compare the horrors of the Nazi Concentration camps to the American "Relocation Centers", there are many similarities. Both of the groups of victims were of the minorities, and these cultures were somewhat of an enemy to the leader of their country. These groups (the Japanese in America nearly two thirds of which were American citizens, and the Jews, Gypsies, the Poles, Slovaks, Communists and other enemies of the state in Germany and Poland, many of which had…...
ComparisonConcentrationConcentration CampsNazi GermanyPolitics
Water Can Kill? Exploring Effects of Osmosis
Words • 726
Pages • 3
Questions 1. What sort of environment (hypertonic, isotonic, hypotonic) does consuming excessive amounts of pure water create in the body fluid that surrounds your cells? What effect would this have on your cells? - A hypotonic environment would be created in the body fluid, as there would be a lower concentration of solutes outside of the cell than inside the cell. This would create the effect of water entering the cells at an abnormal rate, and the cells, eventually, would…...
ConcentrationHealthWater
To investigate the effect to the potato cells in the different solute concentration water
Words • 766
Pages • 4
Water can move through the different cells due to the difference of water potentials in the cells. If there is a higher solute concentration in the cell than outside the cell, the water will move into the cell. However, if the concentration of inside the cell is lower than the outside, water will not move into the cell. This process is called osmosis. Research question; This investigation will determine how different concentrated sugar water will affect to the mass change…...
ConcentrationOsmosisWater
Determining the Osmolarity of a Potato
Words • 1378
Pages • 6
Abstract Students in Biology find it difficult to understand the concept of tonicity and osmolarity in a real time situation. In this investigation, several concentrations of sucrose were used to determine the osmolarity of a potato. It was found that the concentration of sucrose was close to 3.6 in the potato used showing that it was isotonic. Anything above caused the potato to gain weight showing that it was a hypotonic solution and anything below caused the potato to lose…...
AgricultureBiologyConcentrationOsmosis
Investigating The Rate Of Reaction Between Marble Chips And Hydrochloric Acid
Words • 1184
Pages • 5
Planning I will use marble chips and different concentrations of hydrochloric acid and water to see how it affects the rate of reaction. I will use concentrations of 50cm3 using different volumes of water and acid. Introduction I am investigating how the rate of reaction between marble chips and hydrochloric acid is altered when the concentration is changed. This is the word equation for my investigation, Calcium + Hydrochloric Calcium + Carbon + Water [IMAGE]Carbonate Acid Chloride Dioxide The symbol…...
ChemistryConcentrationResearchScience
Food Dye Lab
Words • 641
Pages • 3
Abstract: The purpose of this lab was to determine the food dyes present in a selected beverage, their concentration, and then replicate the solution within a 20% margin of error. The beverage we chose was Gatorade Frost Riptide Rush. A spectrometer was used to determine which food dyes were present in the sampled beverage, red 40 and blue 1 were determined to be present. The next step was to determine the concentration of the dyes, this was done by testing…...
ConcentrationFood
Effect of lipid solubility on permeability of plasma membrane
Words • 1032
Pages • 5
: To study the effect of lipid solubility of molecules on permeability of plasma membrane of animal cell. Introduction : Diffusion: In general, diffusion process occur when there is a concentration gradient between two region .Molecules (other than water) will move by diffusion as long as there is a concentration gradient. A concentration gradient exists when a particular type of molecule (like food coloring dye molecules) is not spread out in an even concentration, but exists in a higher concentration at…...
BiologyChemistryConcentrationScience
Concentration helps the child in his social development
Words • 2957
Pages • 12
“The first essential for the child’s development is concentration. It lays the whole basis for his character and social behavior, he must find out how to concentrate, and for this he needs things to concentrate upon…” The Absorbent Mind, Chapter 22 Discuss how the Montessori Education helps to develop a child’s concentration and helps the child in his social development. In order to accomplish any task you need to be able to concentrate your mind for a time, it is…...
ChildChild developmentConcentrationHelpLearning
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FAQ about Concentration

How different concentrations of the enzyme pectinase affect the degradation of the substrate pectin
...I have to be more precise when measuring the volume of pectinase solution and distilled with the syringe, taking care look at the lower meniscus; and doing the same when noting down the result from the measuring cylinder. I ought to rinse the chopped...
How the concentration of acid affects the rate of reaction
...I would also investigate the rate of reaction at different temperatures of the acid. Instead of waiting for the acid to run out I might measure out that it would be the marble chips that run out. By doing this I could also see how long it takes for t...
How Does Changing the Concentration Of Hydrochloric Acid Affect the Speed It Reacts With Marble Chips?
...I think that most of my experiment was accurate and the method was appropriate. Having said this, I think that something may have been wrong with the 1.75 molar acid because on both graphs the results are irregular. If I did this experiment again I w...
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