Microbiology lab final study play to calculate the concentration of cells (cfu/ml) in a starter culture we need to know the to prepare a pour plate of your juice sample, the sample is first poured into the molten pda, and then poured into the plate false. Data analysis table 1 above show the comparison done between two different body state (rest and after exercise) to calculate vital capacity (vc), tidal volume (tv), expiratory reserve volume (erv), inspiratory reserve volume (irv), inspiratory capacity (ic) and total lung capacity (tlc. Residual sugar concentration is a measure of the amount of sugar solids in a given volume of wine following the end of fermentation and any sugar addition when making a sweet wine residual sugar concentration is expressed in grams per liter (g/l) or as a percentage of weight to volume a two-drop wine sample should be diluted with eight. The total betalain content was found to range between 08 and 13 g/l fresh juice (about 60% betacyanins and 40% betaxanthins) that accounted for 70–100% of the total phenolics content other detected phenolics were hydroxycinnamic acids, which accounted for up to 26% of total phenolics.
Your juice(s) and / or drink(s) to become familiar with the method and to determine the appropriate sample volume(s) for the student exercises label and fill the dropper bottles with the 01 m naoh solution and the phenolphthalein solution. The determination of acid content in vinegar goals we will use a titration to determine the concentration of acetic acid in a sample of vinegar in order to become familiar with acid-base reactions equipment and supplies digital analytical balance, 100-ml beakers (2), 10-ml graduated cylinder, 100-ml volumetric flask, measure the mass. Calculate the molecular weight of each reactant and product: you will need to know these numbers to do yield calculations to calculate the molecular weight of a molecule, simply add up.
For the second part of the lab we will use a computer interfaced probe to find a more accurate measure of these chemicals ph objectives: use red cabbage juice as a ph indicator by recording its color change in various chemicals. Water potential is the measure of free energy of water in a solution this means that the solutions have the same concentration of solutes if two solutions differ in the concentration of solutes that each has, the one with more solute is hypertonic graph paper, pencil, a ruler, a calculator, and colored pencils lab 1e – the. The concentration of each phenolic compound ranged from 666 mg −1 to 3333 mg −1 on the calibration curve each compound was determined by its mass chromatogram and respective mass spectrum isolated from a total ion chromatogram (tic) and quantified as the correspondent peak area. Unit 3 solutions, acids, and bases solutions, acids, and lab exercise 5a: identifying solutions mini investigation: hot and cold solutions biology connection: ions in blood lab exercise 5b: list the different ways you can express the concentration of a solution are some.
Labbench activity how to calculate leaf surface area the rate of transpiration is measured as the amount of water lost/ square meter/ minute because water evaporates through the many stomata on the leaf surface, the rate of transpiration is directly related to the surface area. Chapter 10 spectroscopic methods chapter overview depending on the concentration of ammonia by visually comparing the color of a sample to the colors of a series of standards, nessler was able to determine the concentration of ammonia colorimetry, in which a sample absorbs visible light, is one example of a spectroscopic. Formed on all samples in addition, two separate tests are offered on a request basis these tests are applicable sample is assigned a laboratory number which, along with the year, is stamped on the ssis the samples are final solution concentration: 005 n hcl and 0025 n h 2 so 4.
Procedure summary this is the pre-lab exercise that everyone will complete you will measure the ph of a variety of solutions and then calculate the hydronium ion concentration, the hydroxide ion concentration, and the poh of each solution. Summary of contents 1 introduction 2 processes of lipid oxidation 3 antioxidants 573 total radical-trapping antioxidant parameter 6 summary 1 introduction measuring the concentration of an antioxidant(s) which is not considered here however, it should be recognized that the two. Comparing these two unit definitions shows that ppm is 1000 times greater than ppb (1 ppm = 10 3 ppb) thus: thus: the definition of the ppb unit may be used to calculate the requested mass if the mass of the solution is provided.
Example: a 1x solution of a compound has a molar concentration of 005 m for its typical use in a lab procedure a 20x stock would be prepared at a concentration of 20005 m = 10 m a 20x stock would be prepared at a concentration of 20005 m = 10 m. See how to calculate the concentration of a chemical solution in percent composition by mass, volume percent, molarity, molality, and normality a gram equivalent weight or equivalent is a measure of the reactive capacity of a given molecule two of them are lead so, in a one gram sample of water, two-millionths of a gram would be lead. Reporting slides for bio 10 lab exercise 14 exercise 14 - cellular respiration in yeast 1 the onlydifference between the two processes is that alcoholicfermentation produces ethanol, atp and co2 while lacticacid fermentation produces lactic acid and atp.
Bio100 updated summer 2014 2 preface the purpose of creating this lab manual for biosci 100 as an open educational resource was to provide our students with a high quality, low cost learning resource. Webinar on laboratory math ii: solutions and dilutions this webinar is intended to this information because we cannot readily measure the number of moles of a substance, but we can measure the mass so, we use the mass and the molecular people do this with their juice or other beverages it can also happen inadvertently. Problems and exercises 1221 units of measure, solutions (1) (sample exercise) how many moles and how many milligrams of sodium chloride are present in 15 μl of a 05-m sodium chloride solution calculate the total ligand concentration (c) what percentage of ligand molecules are in complex (sample exercise) we measure the velocity.