With the use of this technique we placed chlorine, bromine, and iodine into solutions containing chloride, bromide, and iodide. In the reaction the free halogen (X2) oxidizes the other halide ion (Y-) and gets reduced by gaining electron(s). In table 3, chlorine was the strongest oxidizing agent and iodine was the weakest oxidizing agent. Since chlorine was the strongest oxidizing agent it will react more and the weak agent will react less. This explanation can be demonstrated in table 3 also because the results of the reactions demonstrates that chloride reacted more by the color of the product compared to the color of chloride in the mineral oil.
Therefore the two kinds of fatty acids compete for same enzyme complex; however, monounsaturated fatty acids are formed in greater concentration than VLCSFA. The reduction in the elongation of VLCSFA and a diet low in VLCSFA will slow the demyelination
Which substance, water or the buffer does a better job of maintaining pH when small amounts of strong acid are added? The buffer does a much better job at maintaining pH. 3. Compare what happen to the pH of flask 2 to what happened to the pH of flask 4 when NaOH was added. Both flask’s pH went up 4.
From this information, the percentage of salt verses water ions can be determined Ions are also produced in the liquid or solid state when salts interact with solvents (for example, water) to produce "solvated ions," which are more stable, for reasons involving a combination of energy and entropy changes as the ions move away from each other to interact with the liquid. These stabilized species are more commonly found in the environment at low temperatures. A common example is the ions present in seawater, which are derived from the dissolved salts. Procedure Obtain 250 mL beaker Weigh dry 250 mL beaker and record weight. Add 10mL of unknown salt and water solution.
Once more alkali is added to this, the solution will begin to increase again in pH, going up to 12 – 14, and being blue/purple in colour through testing with indicator. This would be because there would then be more OH- ions. Hypothesis and prediction: Concentration of an acid affects the pH during a titration. As the concentration of the acid increases, I predict that the volume of alkali needed to change the pH to reach an end point will also increase. I also predict that doubling the concentration of acid will require double the amount of alkali to reach an end point.
It is known that chlorine is more electronegative than bromine, and thus chlorine is more reactive, and less discriminatory as to what it will react with, thus making bromine more “selective”. Another pertinent piece of information to look at would be stability. The stability of a free radical increases as the number of carbon substituents increases. Therefore, primary is the least stable and tertiary is the most stable. Also, the more stable the free radical that is left behind, the weaker its C-H bond strength will be.
When the average heart rate from the Control group, (151), is compared against the 3 average heart rates recorded from the three strengths of alcohol, (133, 109, 109), I interpreted that the heart rate is reduced at all alcohol strengths. My hypothesis for the Caffeine portion of the experiment was that at the introduction of caffeine to the water flea, as well as each stronger level of caffeine to its system, the water fleas heart rate would increase. When the average heart rate from the Control group, (176), is compared against the 3 average heart rates recorded from the three strengths of caffeine, (175, 173, 176), I interpreted that the heart rate is similar to both the control test, as well as with all alcohol strengths. I did not expect those results; I anticipated a higher heart rate. Were I to conduct this project again, I would find a more accurate way to measure the heartbeats, wait longer between applications of both alcohol and caffeine and wait longer after each application of alcohol or caffeine for it to take effect in the water fleas system.
Greater with a concentration from 2.5 to 7.5g/l. Duodenum Body temperature at 37*C is slightly lower than the optimal temperature . may increase sucrase activity since optimal temperature for activity i a 40*C ph 6 of the intestine and the temperature of the body maintains a consistent enzyme activity. increases with increasing sucrose concentration until a plateau is reached. AS substrates are initially added, the activity is higher and then it reaches a plateau with increase.
There has been another increase in improved medical practice as recently, bypass surgery and other similar developments have reduced heart disease and its related deaths by one third. Public health measures and environmental improvements are more reasons for the falling death rate since 1900. There have been improvements in housing (including better ventilation, and less overcrowded houses), improved sewage disposal methods which helped increase the level of hygiene in areas and purer drinking water which raised the health of citizens. Also, the Clean Air Acts reduced pollution which impacted on the number of deaths. Other social changes which are more reasons for the decline
Explain how you determined this. a. Pyrite hypothesis accept/reject = Rejected The hypothesis was rejected as the pH levels in the water increased when tested. While it was only one level, it was higher than the original sample. b. Coal hypothesis accept/reject = Rejected The hypothesis was rejected as the pH levels in the water increased when tested.