Experiment | Observation | 1 | In water a PH is at 6.9In H2SO4 (0.1M), PH is at 1.3 | 2 | Turns milky white, fairly cold | 3 | A Bubbling, gas produced, heat!B Red colour produced, when NaOH added went from red-purple-milky blue. Two distinct layers form of milky blue and bright blue (immiscible) clear and white.C Instant reaction and colour change. Red to purple was the initial reaction then 2 layers D Instant reaction producing bubbles becomes very cold. Immiscible clear and whiteE Colour change to black initially. When in flame it produces gas rapidly and bubbles.
- Make sure the Compounds are no where close to your other sensory organs, remember that only your eyes are protected by the Goggles. -If a compound is spilled, wipe it up immediately and tell the instructor. Materials : powder forms of these compounds - LiNO3 - NaNO3 - KNO3 - Ca(NO3)2 - Ba(NO3)2 - - Unknown compound A - Unknown compound B - Goggles, Bunsen burner, distilled water, Q-tips, paper towel and a striker. Procedures 1- Turn on the Bunsen burner around the 45 degree angle. 2- Feel the gas on the top of the Bunsen burner with your hands, adjust if too high or too low.
| 3 drops of 1% dimethylglyoxime solution. | [Ni(NH3)6]2+ + 2H2DMG→ Ni(HDMG)2 + 2NH4+ + 4NH3 | 9 Al3+ | By heating the solution in the hot water bath. | A black gelatinous precipitate was changed to colorless. | 6M NH3 | [Al(OH)4]- + 4H+ → Al3+ + 4H2O | 10 | Centrifuge the solution. | Colorless solution.
Record reaction height. 10) Splint flame test- Ignite a wood splint, when you have a glowing splint place it in the test tube to react with bubbles, formed from the previous reaction of fresh peroxide and fresh liver. Results: 1) Sand and peroxide- The test of
The Magnesium strip dissolved in the process and the test tube got hotter. gas test observations: The Hydrogen burned up in the test tube causing a loud pop|The final products were Hydrogen gas and MgCl (a clear/transparent liquid).| |Mg|A shiny opaque metal. -Grey/metallic||| Discussion Questions 1. Identify the reaction in procedure steps 3 and 5 as endothermic or exothermic. Explain why.
According to the text more than 80 percent of persons age 70 and over have at lest one chronic condition with multiple health problems occurring in 50 percent of the older population (cite text). They are often accompanied by continuous pain and distress (text). Heart disease is a common chronic condition in older adults. Coronary heart disease also known as CHD, along with stroke are the leading causes of death among older adults. Coronary heart disease is a condition in which blood to the heart is deficient because of a narrowing or constricting of the cardiac vessels that supply it.
The human body normally maintains a set body temperature of 37 degrees Celsius (endotherms). Beyond these boundaries, are enzymes are damaged or ineffective and we are at risk of getting heat stroke or hypothermia, both of which are life-threatening conditions, which is why we need vasoconstriction and vasodilatation. Vasodilatation Vasodilatation does not happen for no reason, there needs to be a stimulus. If the stimulus increases body temperature, for example, exercising, a part in our brain called the hypothalamus sends signals along nerves to activate mechanisms in our body to help it cool down. One of these mechanisms includes- vasodilatation.
The hypothalamus is the processing centre in the brain that controls body temperature. It does this by triggering changes to effectors, such as sweat glands and muscles controlling body hair. Heat stroke can happen when the body becomes too hot; and hypothermia when the body becomes too cold. Temperature control Temperature control is the process of keeping the body at a constant temperature of 37°C. Sweat is made up mostly of water but also contains minerals, urea, lactic acid, ammonia and sugar.
The burning of coal, oil and natural gas. This pollutant comes in both liquid and solid forms. 2. Chlorofluorocarbons: chemicals used fro refrigeration and air conditioning. The release of chlorofluorocarbons emissions and eliminating the and use if ozone destroying chemicals 3.
Method p. 5 5. Results 6.1 Table p. 6 6.2 Graph p.7 6.3 Sample calculations p. 8 6. Discussion/Conclusion p. 9 7. Bibliography p.10 1. AIM/ OBJECTIVE In this experiment, bomb calorimetry will be used to determine the heat of combustion (heat that the fuel gives off over a certain amount of time when it’s ignited).