a standard concentration curve of bromophenol blue. 3. To determine the concentration of the unknown bromophenol blue solutions. 4. To determine the concentration of two different solutes‚ bromophenol blue and methyl orange in a mixture. Materials and Methods: Refer to Biological Science practical manual page 5-11. Results: Part 1: Determination of Amax of bromophenol blue The wavelength with maximum absorbance reading form the graph is 590nm. Part 2: The effect of concentration on absorbance
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region of higher concentration to a region of lower concentration. This happens because of random molecular motion. Molecules move around randomly until there is an even mixture throughout cell and mixture. The overall effect is that molecules move down a concentration gradient from a region of high concentration to a region of low concentration which is passive transport. Osmosis is the movement of molecules down a concentration gradient and at the same time
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strategy. The first part of Porter’s Five-Force model is rivalry. According to Porter‚ rivalry focuses on two main factors which are a high concentration ratio and a low concentration ratio. A high concentration ratio indicates that a high concentration of market share is held by the largest firms which the industry is concentrated. A low concentration ratio indicates that the industry is characterized by many rivals‚ none of which has a significant market share (Porter‚ 2010). Porter offers
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easier to work on Molality. Molality is the solute concentration. Molality of A = no. of moles A dissolved/ no. of kg solvent in solution The boiling point elevation‚ Tb – kbm = ∆Tb ‚ and the freezing point depression Tf – kfm = ∆Tf ‚ uses the concentration. Kb and Kf are characteristics of the solvent used. They use these characteristics to find the molar mass of an unknown substance. Finding an unknown‚ finding two different concentrations‚ then
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Cu(IO3)2 (s) [ ][ [ [ A: [ ( Q: ) ] ][ ][ ] ] What is the equilibrium concentration of Cd2+ ions in a saturated solution made by shaking CdS(s) with water? Ksp = 6.0x10-27 for CdS. [ A: [ Q: ][ ] ][ ] ; ][ ] √ √ A solution in equilibrium with a precipitate of AgCl was found to contain 3.4x10-6M Cl . Calculate Ksp for AgCl. [ ( A: [ ][ ] ; ][ ] ) Q: Since the value of Ksp depends on the concentrations of the ions in solution‚ a larger value of Ksp indicates a more soluble salt
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mechanism behind this theory is based on the reference on the visible light spectrum. Different compounds absorb different wavelengths of light and appear to be the colour that it’s reflected which can be observed with our naked eyes. The higher the concentration of the absorbing compounds in a solution‚ the greater the amount of light that is absorbed. The absorbance of a solution can be determined using the methods as follows: 1) Transmittance‚ T is the amount of light transmitted through a solution
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100% by answering 4 out of 4 questions correctly. 1. The driving force for diffusion is You correctly answered: b. the kinetic energy of the molecules in motion. 2. In diffusion‚ molecules move You correctly answered: a. from high concentration to low concentration. 3. Which of the following dialysis membranes has the largest pore size? You correctly answered: d. 200 MWCO 4. Avogadro’s number is a constant for the number of You correctly answered: b. molecules. 06/17/14 page 1 Experiment
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substance it is in c. concentration ratio of mass or volume of solute to mass or volume of solvent d. heterogeneous a mixture is made up by two or more different substance which are (mixed) together but are not combined e. homogenous mixture mixture that is uniform throughout f. Henry’s Law An expression for calculating the solubility of a gas in a fluid based on temperature and partial pressure g. solution mixture of two or more substances h. Molarity concentration measured by the number
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Title: Diffusion Rate of Methylene Blue on Agar Plates at Different Temperatures Abstract: Diffusion is the movement of particles from an area of high concentration to an area of low concentration wherein substances are independent‚ rapid and in random motion which frequently collide with each other in the sides of the container. This study aimed to assess the influence of temperature on the diffusion rate of methylene blue on agar plates. To determine the relationship between the two variables
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supported the hypothesis that if Daphnia are placed in differently concentrated solutions of barium and calcium chloride‚ then the highest concentration of calcium chloride would affect them the most because of the production of hydrochloric acid and calcium oxide from the mixing of water and calcium chloride‚ two very dangerous acids‚ with the highest concentration having the biggest chemical reaction. Within five minutes of putting the Daphnia into the 10 (ppt) solution of calcium chloride‚ one or
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