Water, Ph, And Buffers - 738 Words

Water, pH, and Buffers Exercise 1: Water and its Unique Properties Data Table 1. Needle Observations. Vertical Observations Horizontal Observations When needle dropped the needle hit the water and sunk to the bottom of the beaker. When the needle dropped I had a couple that sunk to the bottom of the beaker and I and a couple that floated on top of the water Data Table 2. Paper Clips Needed to Break Surface Tension. Estimation Result 115 Paper Clips 210 Paper Clips Data Table 3. Drops of Water. Estimation Result 27 Drops of water 38 Drops of water Questions for Part I, Part II, and Part III A. How did the experiment in Part I demonstrate surface tension? Use your experiment observations when answering this question. Because there is surface tension the water molecules will adhere together to create a skin sheet that can hold the horizontal needle up. The vertical needle breaks through the sheet. If the horizontal needle was wet and to tried to get the needle to float it would not do so. The needles that were dropped horizontally that did not touch the water horizontal would not float because part of the needle is already sinking before the rest of the needle hits the water. B. In Part I, when adding the needle to the water, which approach worked best to balance the needle on the water—the vertical or horizontal placement? Explain your answer. The horizontal method because the needle has more surface area. C. In Part II, how did your paper clip estimation compare to yourShow MoreRelatedInvestigating The Ph Of Water Sources Essay782 Words   |  4 PagesWeek 2 started by determining the pH of 8 water sources. The pH of the various water sources are displayed in Table 2 as follows: rain water at 5.58, water with atmospheric levels of CO2 at 6.40, the Jordan river at 6.60, the Clear creek at 7.20, Lake Monroe at 7.74, water saturated with CaCO3 at 9.45, and water saturated with CO2 at 4.10. Identity of Sample pH Rain water 5.58 Water with atm. Levels of CO2 6.40 Jordan river 6.60 Clear creek 7.20 Griffey Lake 7.49 Saturated with CaCO3 9.45 SaturatedRead MorePreparation Buffers1323 Words   |  6 Pages Abstract Buffer solutions were prepared and their pH measured to determine their buffering capacity. Three buffer solutions were utilized; an undiluted buffer, a diluted buffer solution with 10ml water and a diluted buffer solution with 18ml water. In the undiluted buffer solution there was minimal pH change with a high of 6.78 and a low of 6.47. In the buffer solution in which 10ml of water was added there was minimal pH change with a high of 6.78 and a low of 6.23. In the buffer solution inRead MoreInvestigating If Liver And Potato Cells Contain Natural Buffers That Resist Large Change772 Words   |  4 Pageslab is to determine if liver and potato cells contain natural buffers that resist large change in pH as 1. NaCl or 1. NaOH are added to the solution. Hypothesis: If adding an acid or a base to liver and Potato cells then the solutions will become buffers. Materials: pH paper- cut into chunks 0.1 Molar NaCl 0.1 Molar NaOH Commercial Buffer Solution- pH 7 Liver homogenate- 10g per 100mL of water Potato homogenate-10g per 100mL of water 25 mL graduated cylinder 50mL beaker 2 Pipettes Tweezers SafetyRead MoreActivity 4 Assessing Fat Digestion by Pancreatic Lipase and the Action of Bile1109 Words   |  5 PagesAmylase, DI Water DI Water, Starch pH 7.0 buffer pH 7.0 buffer pH 7.0 buffer pH 7.0 buffer Incubation Cond. Boil, Inc. 37 deg.C 37 degrees C 37 degrees C 37 degrees C for 60 minutes IKI Test: Benedicts Test: Chart 1 – Salivary Amylase Digestion of Starch (5,6, 7) Tube # 5 6 7 Additives DI Water, Maltose Amylase, Starch Amylase, Starch pH 7.0 bufferRead MoreHow Are Organisms Able For Survive And Function With Proficiency Despite Metabolic Activities?1604 Words   |  7 Pageshave the disastrous ability to alter pH from a neutral to an acidic or basic environment?† This question needed to be answered by testing different biological materials, as well as tap water, in order to find out what allows modern day organisms to survive such hazardous conditions. A hypothesis that was formulated before experimenting was, â€Å"If type of substance is Tap Water, then the changes in pH will be more drastic because water, considered neutral on the pH scale, doesn’t contain a component thatRead MoreStudying the pH of Strong Acid, Weak Acid, Salt, and Buffer Solutions1676 Words   |  7 Pages Studying the pH of Strong Acid, Weak Acid, Salt, and Buffer Solutions The purpose of the current experiment was to determine the pH of various hydrochloric acid and acetic acid solutions, to determine the pH of various salt solutions, to prepare a buffer solution, and determine the effects of adding a strong acid and strong base to the buffer solution versus adding a strong acid and strong base to water. The measured pHs for the hydrochloric acid solutions were 1.6, 2.2, 2.9, and 3.8. The measuredRead MoreThe Effect Of Ph On The Ph Of A Solution1482 Words   |  6 PagespH is a measure of the concentration of the H3O+ ions in a solution, and buffers are solutions that resist changes in the pH when an acid or an alkali is added. The objective of this lab was to determine the ways in which a buffer could effect changes in pH of a solution. This was done through titrations of phosphate solutions, acidic HCl, and basic NaOH, with distilled water. The intent was to note the changes caused by the buffer by observing the buffering range and buffering capacit y from theRead MoreThe Effect Of 5 Drops Of 0.1m Hydrochloric Acid1227 Words   |  5 Pages(HCl) and Sodium Hydroxide (NaOH) on The pH Level of 5mL of Tap Water, Distilled Water, Commercial Buffer, and 10% Homogenized Potato Solution Aya Ali Ms. Kim February, 29. 2016 SBI4U-04 Background / Pre-lab Questions: Figure 1: Logarithmic pH scale (WHOI, 2016) Almost all liquids that an individual encounters in their daily lives are classified as an acid or base, based on their hydrogen ion concentration relative to pure water, water that does not contain any salts andRead MoreHydrogen Phosphate Buffer Systems Essay1131 Words   |  5 PagesExperiment 8: Hydrogen Phosphate Buffer Systems Purpose The purpose of the lab was to create a buffer solution and observe the capacity of the phosphate buffer system. Also, the experiment was meant to provide experience with the calculations and mathematics involved in creating the buffer solution. Finally, the lab was designed to provide an insight and appreciation for the necessity and complexity of buffers in our physiology and in the environment. Procedure No deviations were made fromRead MoreThe Effects of Ph and Concentration Levels on Catecholase Essay1272 Words   |  6 Pagesactivity of the enzyme catecholase in different pH levels as well as its absorbance in differently concentrated solutions. A spetrophotometer was used to measure the absorbance of the enzyme catecholase in different pH solutions as well as to measure the absorbance of catecholase in solutions with different concentrations of potato juice and phosphate buffers. Absorbance of the enzyme catecholase was at an optimum level when pH was close to neutral. When pH was acidic or basic, the catecholase was less