Water quality and contamination Tijuana R Harvey SCI207 Dependence of Man on the Environment Instructor: Kathryn Garland Nov.3‚ 2014 Water Quality and Contaminants Water being one of our most precious resources we have to question the quality of our water quality and things that maybe contaminating it. Water affects not only humans it affects other living things such as animals‚ plants‚ and aquatic life and hydroelectric machinery. Some would believe that it should be a human right to have clean
Premium Water Water pollution Human
Materials: 1. 2 Plastic cups 2. Tap Water 3. Teaspoon 4. Bag of salt 5. Freezer 6. Clock 7. Paper 8. Pencil Procedures: 1. Take plastic cup and pour in one cup water in each 2. Take one teaspoon of salt and mix it in one of cups 3. Put both cups in the freezer 4. Observe. Conclusion: When salt is added to water it slows the freezing process down‚ therefore the freezing point of tap water is higher than the freezing point of salt water. Hypothesis: If..
Premium Water Temperature Solid
Lab 2 – Water Quality and Contamination Experiment 1: Effects of Groundwater Contamination Table 1: Water Observations (Smell‚ Color‚ Etc.) Beaker Observations 1 This beaker has water only‚ clear with no smell 2 I mixed oil in the water‚ the oil then started to settle at the top of the water. (oil is not a soluble) 3 Beaker contained vinegar and water‚ the water got a little cloudy and the vinegar smell is very strong. 4 The water and laundry detergent mix had a soapy look to it‚ water also
Premium Drinking water Water pollution Water
Iron: 2. Separating out the Sand: 3. Separating out the Benzoic Acid: 4. Separating out the Salt: Grams Percent of Mixture Weighing Dish 0.5 .5/6 * 100= 8.3% 10cm Paper 0.6 .6/6 * 100= 10% Iron 1.9 1.9/6 * 100= 31.7% Sand 1.1 1.1/6 * 100= 18.3% Benzoic Acid 0.5 .5/6 * 100= 8.3% Salt 1.4 1.4/6 * 100= 23.4% Total 6.0 100% Questions: 1. How did your proposed procedures or flow charts at the beginning of this experiment compare to the actual procedures of this lab exercise
Premium Water Kilogram Mass
In this experiment I will investigate the temperature of 50cm³ of water before and after I have added calcium chloride‚ I will gradually increase the amount of calcium chloride by 1 gram to see if there is a significant change. When Calcium Chloride is mixed with water it performs an exothermic reaction which makes new bonds between the salt (Calcium Chloride) and the water. This will therefore make the solution of the reaction increase in temperature. Exothermic reactions transfer energy
Free Thermodynamics Energy Chemical reaction
Candles have some rather interesting chemistry (as you ’ll find about in this experiment). Have some fun and find out what color candle burns the fastest by conducting your very own candle race! Required materials 5 candles of varying colors‚ preferably white‚ pink‚ yellow‚ green‚ and blue (must be same brand and size) Ruler Marker or Sharpie Matches or lighter Scissors Clay‚ Putty‚ or Play dough Ceramic plate Stop Watch Pencil Notebook (to record results) Estimated Experiment Time About 1 to 2 hours
Premium Fire
Macromolecules of Life Hands-On Labs‚ Inc. Version 42-0085-00-01 Lab Report Assistant ________________ Name: Akil Kelly Exercise 1: Testing for Proteins Data Table 1: Biuret results. Substance Tested Predicted Results Biuret Color & Number of drops added 1: Egg white Contains Protein Purple color – 9 drops 2: Pepsin Contains Protein Purple color – 9 drops 3: Sugar Doesn’t contain protein Blue
Free Glucose Carbohydrate Starch
Water Wheel Work‚ Power‚ and Efficiency Pre-Lab Preparation: Purpose: The purpose of this lab was to create an efficient water wheel that would produce a productive time in lifting the cup of nuts and bolts that was attached to the pipe used in rotating out water wheel. The more efficient our wheel was the better the time we would have in lifting our cup. We were then able to observe the work that was needed to turn the axel‚ the time that is taken to bring the cup of washers to the axel‚ and
Free Scientific method Hypothesis Observation
concentration is called Diffusion. Osmosis is the diffusion of water through a selectively permeable membrane from an area with greater concentration of water to an area with less concentration. A Hypertonic Solution is a solution of a higher concentration of solutes and a smaller concentration of water molecules than another solution. However‚ an Isotonic Solution is a solution that contains an equal concentration of solutes and of water molecules‚ the same as another solution. A solution that contains
Premium Water Osmosis Seawater
LAB REPORT FOR EXPERIMENT #2: PURIFICATION OF ACETANILIDE BY RECRYSTALLIZATION Your name TA’s name Your Partner’s name Lab Section OBSERVATIONS: A. SELECTING A RECRYSTALLIZATION SOLVENT | |Solubility Test (cold) |Solubility Test (hot) | |Water |insoluble |soluble | |pet ether |insoluble
Premium Solubility Solvent Solution