6. Zinc Sheet: a rectangular, thin, sheet like metal, gray/silver. 6 5 4 3 2 1 * Solubility of solid iodine; 1. Solid iodine in 1 mL of water is slightly soluble, because the solution turns into a light brown/yellow color. However majority of the solid Iodine was left at the bottom of the test tube; which leads to the conclusion that it’s not reactive on water.
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. Also it also demonstrates that iodine is the weakest oxidizing agent because the results show that iodide didn’t change much from the color that it showed in the mineral oil. In example 6 we have shown the activity series for the halogens used in this
The oil later added simply stayed in the middle between the liquid and the suds at the top. Analysis: 1. The substance MSG is water soluble, it completely dissolved when added to water, but was not soluble in alcohol. 2. Vegetable oil is hydrophobic and there for is not water soluble but alcohol on the other hand is completely soluble with vegetable oil.
The only thing that's somewhat similar are the -CH2- peaks between 1ppm and 2ppm, although there are five CH2 groups in cyclohexanol in three chemically equivalent groups, and only 4 CH2 groups in cyclohexene in two equivalent groups, so they look very different in the spectrum.The rest of it is not even similar at all: in cyclohexene, the equivalent sp2-hydrogens give a signal at 5.6ppm, and that's it in cyclohexanol, the -CH- hydrogen connected to the oxygen has a qiuntuplet (in first order approximation) about 3.5ppm, and the -OH hydrogen itself has a signal which is pH-dependent, can be anywhere from 2 to
Low density polyethylene (LDPE) – involves an older gas phase process (still used) with conditions: high pressure (1000-3000 times atmospheric), high temperature (300°C) and an initiator (an organic peroxide e.g. dibutyl peroxide, or oxygen). The resultant product has significant chain branching due to alkyl groups replacing hydrogen atoms on some carbon atoms. Consequently, the alkane chains cannot pack together in an orderly fashion, resulting in low densities and weak dispersion forces; therefore LDPE is soft, flexible and has a low melting point. The initiator isn’t strictly a catalyst as it is involved in the actual formation (one initiator molecule per ½ polymer molecule).
Using the formula [H3O+]=10-pH, we are able to use the recorded pH of the buffer solution, which is 6.79, to calculate the hydronium ion concentration. [H3O+]green=10-6.79, so the hydronium ion concentration is 1.62x10-7 M. Since the pH of the buffer solution if 6.79, it is slightly acidic, and thus, will have a higher hydronium ion concentration than its hydroxide ion concentration. Using the calculated hydronium concentration of the green solution, we are able to calculate the Ka of the bromothymol blue using the formula below. Ka=[H3O+]green x (Agreen / Ablue-Agreen)* *Absorbance at 616 nm. The formula excludes the absorbance of the “yellow” solution because almost all of the bromothymol blue is in the HBB form in the acidic “yellow” solution, resulting in the yellow color and making its absorbance at 616 nm almost 0, or negligible.
Name: ___________________________________ Date: ______________ Practice Test #3 ____ 1. When a precipitation reaction occurs, the ions that do not form the precipitate A) evaporate B) are cations only C) form a second insoluble compound in the solution D) are left dissolved in the solution E) none of these 2. An aqueous solution of potassium chloride is mixed with an aqueous solution of sodium nitrate. The complete ionic equation contains which of the following species (when balanced in standard form)? A) B) C) D) E) ____ 3.
What is the reason for this difference in melting points? (3 points) Ionic compounds have higher melting and boiling points than covalent compounds. This is because the electrostatic attraction in an ionic bond is very strong which means lots of heat energy is needed to break it down. Ionic bonds have high melting and boiling points. On the other hand covalent bonds, the intermolecular forces are very weak and is easily broken,hence lesser heat is required and thus covalent bonds have lower melting and boiling points.
The zinc granules will provide unaccurate results. 1b. Will the density of zinc using granules be greater or smaller? We know that density = mass/volume. Therefore, if zinc granules provide a larger volume with a constant mass, the density would be much smaller.
Next the freezing point which didn’t eliminate either of them. Next we look at the mass which was 7.465g/ml. This make me lean toward ethyl ether but the masses were still pretty close. Next we move to the solubility of the substances. They are both very soluble in alcohol and hexane so that doesn’t help, but in water ethyl ether is semi soluble and pentane is in soluble.