Does Soap Affect the Surface Tension of Water? Background: Surface tension refers to water’s ability to "stick to itself". Surface tensioncan be measured and observed by dropping water (drop by drop) onto a penny. Thenumber of water drops that can fit on a penny will surprise you. Question: How does soap affect the water’s surface tension? Hypothesis: I think that the surface tension of soapy water will be less than that of freshwater because H 2 0 has strong polar bonds‚ and when water is mixed with
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155M Fork 19.8cm 198mm .198M Water Temperature C° Temperature F° Temperature K Hot from tap 38 C° 100.4 F° 311K Boiling 93 C° 199.4 F° 366K Boiling 5 minutes 95 C° 203.0 F° 368K Cold from tap 15 C° 59 F° 288K Ice water 1 minute 8 C° 46.4 F° 281K Ice water 5 minutes 5 C° 41.0 F° 278K Object Estimated mass (g) Actual mass (g) Actual mass (Kg) Mechanical pencil 4g 5.55g .00555kg 3 pennies 9g 8.7g .0087 kg 1 quarter 6g-7g 5.75g .00575 kg 2 quarters‚ 3 dimes 13g 18.3g .0183
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4/20/16 Chemistry- Water Polarity Mrs. Jenny Polarity: The intermolecular forces between the slightly positively- charged end of one molecule to the negative end of another of the same molecule. Polarity simply means that the molecule has both a negatively and positively charged end. The polarity of water is important because it is responsible for dissolving other polar molecules like ionic compounds (such as salt) and sugars. To form ions‚ ionic compounds must be dissolved in water. This is important
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Investigation: The Stanford prison experiment was originally intended to run for a fortnight. However it lasted only 6 days and was ended earlier than initially planned due to the terrible living conditions and psychological problems that developed as the ‘inmates’ and ‘guards’ interacted.. The experiment was run by Philip Zimbardo‚ Craig Haney‚ David Jaffe‚ and W. Curtis Banks. The test subjects were young male college students that were chosen from 75 volunteers. The volunteers had replied to
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The inverted water method MLA citation BBC News. BBC‚ n.d. Web. 09 Nov. 2015. "Factors Affecting Enzyme Activity." Factors Affecting Enzyme Activity. N.p.‚ n.d. Web. 14 Nov. 2015. Enzymes. Scenario experiment AIM: To investigate one factor that affect the distribution of hydrogen peroxide by the catalase in this organism. In this catalase and hydrogen peroxide experiment‚ we will find out how enzymes act as catalysts by causing chemical reactions to occur. Using a potato and hydrogen peroxide
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Catalase Experiment Research Question: How does the weight of a piece of liver (0.4g‚ 0.8g‚ 1.2g and 1.6g in this case) affect the amount of gas created after 2 minutes when combined with hydrogen peroxide? Aim: To see find out how the amount of catalase correlates with the amount of gas created when in combination with hydrogen peroxide. Materials: 15g of liver 25 ml of hydrogen peroxide 1 scale 1 bucket 1 100ml graduated cylinder 1 250ml flask with bung 1 50cm tube (able to fix onto top of flask)
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purpose of this lab was to study the specific characteristics of cations and anions‚ and ultimately to be able to identify an unknown substance based on our studies and tests using the logic trees developed through the experiment. A logic tree is a graphical display of the findings from this lab which‚ through a series of yes/no questions‚ elimination tests‚ will help us to identify and unknown sample. This lab will result in 2 logic trees‚ one for identifying cations and the other
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three different temperatures of water on Alka-Seltzer tablets. In the experiment they first tested how long an Alka-Seltzer tablet would dissolve in cold water ( 9 degrees) then repeated it two more times in order to calculate a mean. Then using a hot plate to heat the water‚ they tested another tablet in the hot water (51 degrees) to see how long it would take to dissolve and again did it two more times to calculate a mean. Finally they tested another tablet in water left on the hot plate for thirty-seconds
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Theory: The purpose of this lab was to confirm the chemical formula of magnesium oxide by comparing the masses of pure magnesium solid prior to any reaction and magnesium oxide solid after a reaction between all of the magnesium and oxygen from the air when heated from a Bunsen burner in a crucible. Using molar masses of both magnesium and oxygen‚ an expected percent composition‚ by mass‚ was found and compared to our experimental results. Experimental: 1. Setup ring stand 2. Obtain desired amount
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Pharmaceutics Experiment 2 Preparation of a Hand Cream OBJECTIVE 1. To learn the method of preparing a hand cream. 2. To appraise the function of the ingredients in the hand cream. BACKGROUND Cream is a kind of dosage form and particularly hand cream is formulated to carry out a variety of cosmetic functions. Among these are softening and moisturizing the skin; elimination of natural waste products (oils) by emulsification; and cooling the skin by radiation‚ thus helping to maintain body temperature
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