Use these home remedies to remove tanning from your darkened neck: • Rice Powder, Milk and Honey – Mix two tablespoons of milk with two teaspoon rice powder and one teaspoon of honey. Prepare a fine paste and apply it on your neck. Massage gently on your neck for 20 minutes. This paste acts as a scrub and alleviates all the dead skin cells and removes tanning from your skin. • Lemon Juice and Cucumber – Just mix two teaspoon each of lemon juice and cucumber juice and apply this paste on your neck and wash off after 10 minutes.
After cooling, the flask was weighed in an analytical balance. The experimental molar mass was 45.56g, which is closely identical to the 46.068g of the molar mass of ethanol. The percent error between the two values is 1.10%, the probable sources of error are the following: the size of the tiny hole in the aluminum foil, measurement of the temperature in the thermometer, and measurement of the initial volume of the flask. The recommendation for the experiment is to dry the flask completely before measuring the initial mass and to closely observe if the temperature of the water bath is
In the reaction between potassium iodide (KI), hydrogen peroxide, sodium thiosulfate (Na2S2O3) under acidic condition. Apparatus: The apparatus used in this experiment are as follow: 50cm3 measuring cylinder 25cm3 measuring cylinder 100cm3 beaker White
If the solute was wholly dissolved in the solvent before heating, it was recorded as a bad solvent. If the solute dissolved after being warmed in a water bath, it was set aside to cool to allow recrystallization; if their recrystallization occurred or not was recorded. If the crystals did not form previous to heating, the solution was placed in ice bath. After the ice bath, if the recrystallization did not occur then it was seeded. After completion of the solubility tests, the appropriate solvent, cyclohexane, was selected for large-scale recrystallization.
The residual biomass was separated by filtration and washed with distilled water. For alginate extraction, the acidified algal biomass was suspended in 3% Na2CO3 solution at different alkali: alga ratio (20, 40, and 60 mL/g). The different extraction temperatures ranged from 25 to 45º C, and lasted for 1 to 3 h. For each experimental run, sodium alginate was collected by filtration and precipitated with absolute ethanol (1:2 v/v). The mixture was maintained at 4º C overnight. The precipitate was collected by vacuum filtration and allowed to dry at room temperature.
Sodium Bicarbonate mixed with Hydrochloric acid. The chemical reaction observed showed that there was fizzing and bubbling, this is evidence that a new gas was being produced. This new gas, CO2 was generated from the reaction. After the fizzing stopped a liquid was leftover leading me to conclude the liquid leftover leading me to conclude the liquid leftover was the NaCl and H2O 4. You found a sample of a solution that has a faint odor resembling vinegar (an acid).
The active ingredients in the alka seltzer tablet are “As the tablets dissolve, the sodium bicarbonate splits apart to form sodium and bicarbonate ions. The bicarbonate ions react with hydrogen ions from the citric acid to form carbon dioxide gas (and water). This is how the bubbles are made.”(Scientific American) These bubbles are representative of a chemical change and the resulting carbon dioxide should increase the water 's density. This may actually increase the volume of the water taking longer to boil, this difference may be minuscule, even negligible, but there 's a possibility for distinct change in results. This scientific American puts it best “For the reaction to occur,
We let the potato cores sit in the solution overnight. The next day we then emptied the beaker of the solution by carefully draining the solution, while not letting the potato cores fall out. We then took the potato cores out of the empty beaker and dabbed them lightly with paper towel to get any excess solution off. We did this quickly and following it we then took the mass of all four potato cores again and recorded
2 tablespoons of mashed papaya, 1 teaspoon of milk. Add both the ingredients in a bowl and mix them well. Then apply it over your face with a face pack brush or your fingers. Leave the pack on your face for good 15 to 20 minutes and then massage it with wet fingers before rinsing it
Put the caps on the bottles and shake them until all the sugar is dissolved. Testing the Sugar Solutions All of the solutions should be the same temperature before testing Place the hydrometer in the 0% sugar bottle, record your reading in your notebook Repeat this step for the 5%, 10%, 15%, 20% and 25% sugar solutions. Rinse and dry the hydrometer between readings. Testing the Soda and Iced Tea Place the hydrometer in soda 1(coke). Record the value on the hydrometer in your notebook Remove the hydrometer and rinse and dry