Lab 2: Protiens and Starches Purpose: An introduction to testing procedures for two large‚ organic molecules: proteins and starches. Hypothesis: In the test for protiens the water‚ being that it is inorganic will not test positive for protiens; it will serve as the negative control. The milk and 50% egg solution should test positive for protien as they are subsatnce derived from animals which contain protiens in order to carry the functions of life. The sucrose will test negative due
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alcohol c. burning in air d. slicing into two pieces ______ 7. At sea level‚ water boils at 100°C. This is an example of a(n) a. chemical property. c. physical property. b. extensive property. d. chemical change. ______ 8. Every pure chemical compound consists of two or more elements that a. are combined chemically. b. can be separated by a physical change. c. cannot be separated. d. are combined in any proportion. Copyright © by Holt‚ Rinehart and Winston. All rights reserved. Modern
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II. Azo compound is compound that contain azo group (-N=N-) between the conjugated aromatic ring and absorb light to show. Azo compounds are usually intensely coloured because the azo (diazenediyl) linkage –N=N-‚ brings the two aromatic rings into conjugation. This gives and extended system of delocalized π electrons and allows absorption of light in the visible region. Azo compounds‚ because of their intense colours and because they can be synthesized from relatively inexpensive compounds‚ are used
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Physical Properties of Organic Molecules Abstract Identifying the physical properties of compounds can be useful in several ways. It helps us to determine the structure of certain compounds‚ the purity of substances and if a substance is not pure we can figure out how to separate contaminating substances from a compound. In this experiment‚ I learned how to determine a solid’s melting point and why some melting point ranges may be broader than others.
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comes my way. 3.Would you rather have a savings account that offered simple interest‚ or an account that offered compound interest? Why? I would rather have a simple interest account. The reason why is it’s much easier to calculate and keep up w/ how much money you have. Also another reason is your money stays the same each year. 4. If you were opening a savings account with compound interest‚ would you prefer an account that offers annual compounding‚ quarterly compounding‚ or daily compounding
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Extraction of Organic Compounds From Natural Sources: Extraction of Trimyristin From Nutmeg Introduction The purpose of this experiment is to illustrate how a solid natural product can be extracted from its natural source through the use of an organic solvent. Natural products are organic compounds that are synthesized by natural biological processes in plants‚ animals and microorganisms. These products typically occur in mixtures of many different compounds‚ so to obtain a particular
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SOAP & DETERGENT I) Definition of Soap o Soap are sodium or potassium salts of long-chain carboxylic acids o The general formula of a soap : RCOO Na / RCOO K • R is an alkyl group which contain 12 to 18 carbon atoms. II) The history of soap manufacturing. ▪ Solvay Process - Carbon dioxide ( obtained from heating CaCo ) is passed into concentrated NaCl solution which is saturated with ammonia . NaCl +NH +H
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1. | An experiment is carried out to determine the freezing point of naphthalene.Solid naphthalene is heated in a water bath until it melts completely. The initial temperature is recorded. Then molten naphthalene is left to cool. The reading of the temperature is recorded every 30 seconds. Figure below shows the recorded thermometer readings at 30 seconds intervals. Satu eksperimen dijalankan untuk menentukan takat beku naftalena. Pepejal naftalena dipanaskan di dalam kukus air sehingga melebur
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Fos 108 review Math refresher 1. Qualitative = IDENTITY of a material‚ Quantitative = PERCENT COMBINATION‚ order of operations PEMDAS‚ 2. Units of length: meters (m) a. millimeters (mm): 1mm = 1-3m = 1/1000 m b. centimeters (cm): 1cm = 1-2m = 1/100 m c. kilometers (km): 1km = 13m = 1000m 3. Units of mass/weight: grams (g) a. milligrams (mg): 1mg = 1-3g = 1/1000 g b. kilograms (kg): 1kg = 13g = 1000g 4. Units of volume: liters (L) a. milliliters (mL): 1mL = 1-3L = 1/1000 L Percent of
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Economics Revision AER (saving) Annual Equivalent Rate (AER) shows the percentage of compound interest that would be paid on your savings once a year if you didn’t withdraw or add anything. The AER is the official rate for savings accounts‚ and allows you to compare rates fairly. You might also see the ‘Gross’ interest rate shown – which will be less than the AER because it doesn’t show compound interest‚ just the flat rate of interest you’d get for the original amount you saved. APR (borrowing)
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