Boiling

The light extinction method was developed based on the works of Piere Bouger, August Beer, and Johann Heinrich Lambert (1760). Bouger observed for the first time that the light intensity of a candle decreases when it passes trough a transparent medium and appointed the length and the medium property as the main parameter to explain the light extinction. The correlation of absorbance and light path was proposed by Lambert. Finally, Beer concluded that absorbance is also proportional to the…

According to appendix 1, the Boiling Crab’s menu has a limited number of foods and beverages, so the existing customers may feel bored after eating them for many time. Therefore, I think the owner should add a seasonal menu to draw the attention of these customers. To illustrate, the Boiling Crab should have drinks with the special dish during spring, summer, fall, and winter. In summer, the fresh coconut juice imports from Thailand, and the seafood with special sauce comes from Vietnam.…

The purpose of this experiment was to find the affect of salt on the temperature of boiling water. Each time I added more salt the temperature was higher than the last one. From the data I collected it shows that the more salt you add the higher the temperature. If you add salt to boiling water the temperature will increase. The data collected shows that my hypothesis was correct because the average number of the different amounts of salt was higher than the last one. Water boils when the…

What is boiling point elevation? How might this have affected your results? Boiling point elevation is the event in which the boiling point of a liquid becomes higher because of an added compound. Ultimately, the boiling point of the solution obtains a higher boiling point than a pure solvent like water. For the lab that was conducted, the solvent that was used was tap water and that itself contained numerous minerals dissolved in it and a variety of chemicals. Boiling point elevation is…

distillation was first used to separate the unknown mixture into its components based on boiling point. Distillation refers to the method of separating components of a mixture through heating and cooling. Simple distillation, which is especially useful in the separation of less-volatile substances from volatile substances, such as sugar from water, can be used to separate a liquid-liquid mixture if the boiling points of the component liquids differ by more than 40-50°C. A plot of temperature…

trends in physical properties of organic compounds such as boiling points and melting points can be deducted from their structures, including size (molecular weight, surface area), shape and functional groups. These factors significantly influence the strength of the intermolecular forces of attraction present; and the nature and strength of intermolecular forces determine the variations in boilingpoints of organic compounds. The boiling point of a liquid is the temperature at which its vapor…

solubility in water, hexane and ethyl alcohol. Also, its density and boiling point were obtained and compared to the theoretical values. Theory Chemical substances can be identified through investigation of their chemical and physical properties and then comparing the experimental values to the standard values. Physical properties do not change the chemical composition of the substance. Physical properties include; density, boiling point, and solubility, etc. The density of a substance is…

Conclusion: The general conclusion that I was able to produce about the effects of salt on the boiling point temperature of water is that with the addition of salt, the boiling point temperature of water increases. The results of the lab experiment do agree with my predictions and I can accept my initial hypothesis. However, I believe the data would be more consistent and solid had 2M and 4M of NaCl had been included in the experiment, rather than jumping from 1M to 3M to 5M. Discussion: For…

begin the experiment 3 test tubes must be acquired; a boiling tube, large test tube and a small test tube. The large test tube must be completely dried with a paper towel and labeled R for Reactants. After that is done a piece of weighing paper should be placed on a balance and tared. After make sure the balance is correctly tared, a spatula must be used to collect 2 grams of granular Zinc on the weighing paper. The zinc is then added to the boiling tube. Using a different spatula weigh out 2…

In this method, a solute is dissolved in a solvent at boiling point to increase solubility. The new solution is then cooled to get pure crystals of the solute. Using this technique of an unknown helps one get a pure substance which could be tested for melting point. In Figure A, the red arrows show the series…