Calculate the concentration of grams of sodium stearate per milliliter of diluted solution. To do this, multiply the concentration of sodium stearate in the dishwashing liquid by the dilution of the solution (1.50 mL dishwashing liquid per 100 mL solution). Answer = 1.5 *10^-4 g/mL 4. Calculate the number of moles of sodium stearate in a single layer. To do this, first take the number of drops used to achieve the monolayer (1 drop) and convert it to mL using the calibrated number of drops per mL.
This technique is highly used on DNA, RNA, and proteins. This technique is all taken place in a gel electrophoresis chamber. The chamber includes a buffer solution, an Agarose gel, a cathode end, and an anode end. The cathode end of the chamber is negatively charged and will attract molecules that have a positive charge, while the anode end is positively charged and will attract molecules that are negatively charged. The buffer solution is used to keep the pH of the experiment at a constant number while carrying ions that are essential to hold a current.
Add 0.5 ml concentrated HCl and 1.0 ml 15% KI solution. Mixed exactly 1 minute and leave for 5 minutes in a dark place. Add 0.5 ml starch solution, 20 ml distilled water. Mix and titrate with sodium thiosufate solution. Calculate the exact normality of Na2S2O3 knowing that in this chemical reaction 1 gram-equivalent of K2Cr2O7 react with 1 gram-equivalent of Na2S2O3 (1 mole K2Cr2O7 react with 6 moles Na2S2O3).
Fill a 10 mL graduated cylinder with ≈ 7mL if water c. Fill a 1000 mL beaker with ≈ 750 mL of water d. Invert the graduated cylinder into the beaker. Add water to the beaker to completely submerge cylinder. e. Measure the difference between the height of the water in the graduated cylinder and the height of the water in the beaker. f. g. Record the barometric pressure in mmHg. Heat the water via Bunsen burner to 80°C.
It is important for an IV solution to have salts in it so the water and solute can be equal to create an isotonic environment. If there wasn’t, there would either be a hypotonic causing the cell to burst, or there would be hypertonic causing the cell to shrink. We created models of living cells by using dialysis tubing. The dialysis tube represented the cell membrane to act as selectively permeable to water and some solutes. We observed different solutes (NaCl, Ovalbumin, Glucose, Sucrose, and Water) in the dialysis tubing.
With knowledge of water potentials, one can chart the gains and losses of water to find the molarity of a specific solution. fluids flows to areas of lower water potential, so this information can be used to find out how concentrated the solution of testing is. Methods: To measure the concentrations and water potentials of the solutions in question one fills dialysis tubes with 10 ml of different concentrations of fluid and submerges them into a bath filled with the solution in question. After submerging the tubes into the solution, one will wait approximately 30 minutes for the tube to reach equilibrium. With 10 ml of solution initially filling the tubes, one would track
The nephron itself will then restore the vital nutrients and water back into the blood, while retaining the waste products the needs to eliminate, through the proximal and distal tubules. When there are no diuretics in the blood, when tubular reabsorption occurs through the proximal tubule, selective reabsorption of nutrients, such a sodium ions, from the filtrate go back into the blood. So, when sodium ions are reabsorbed by the blood, negative ions such as chloride ions follow due to the charge attraction. The highly concentrated solutes create an osmotic force, so water is also reabsorbed and is also reabsorbed. Then the filtrate goes through the descending loop of Henle, which is permeable to water (water retained back), and then through the ascending loop of Henle, which is permeable to salt (salt is retained back).
Independent Variables: • The range of pH, between 6-8 pH. Method: 1. Firstly, place the buffer tablets into a test-tube containing 20 ml of water (at room temperature). 2. Once the buffer tablet has dissolved into the water, add 10 ml of starch solution.
So a drug requires a number of partitioning and diffusion step. In this route drug passes through cytoplasm of cells. This route is suitable for hydrophilic drugs and highly hydrated keratin gives aqueous pathway to the hydrophilic drugs. The drug passes through the corneocytes of stratum corneum. iii) Intercellular route :- Intercellular pathway the drug diffuses through the continuous lipid matrix present between the cells.
I then took the number of gallons I use a year and multiplied it with 125,000 BTUs, which is the amount of energy in one gallon of gasoline, to find the total number of BTUs I use in one year (50,000,000). 2. To find out the heat energy to heat the water of my house I first weighed my container (107 g). Then I turned on the water faucet so that it dripped about 1 drip per second. I then captured the water in my container for 15 minutes.