Lab 12 Essay

During the immersion of the magnesium metal in the hydrochloric acid solution, white bubbles could be seen escaping the surface of the metal as gas was produced during the reaction. Depending on the temperature of the hydrochloric acid and the overall molar concentration, the rate of reaction differed but the same signs were shown. During the reaction between the magnesium metal and higher concentrations of hydrochloric acid, it was observed that the test tube grew quite warm to the touch. As the immersed magnesium strip sank down, it appeared coated in a layer of white bubbles that fizzed like a carbonated drink. In the lower concentrations of hydrochloric acid, the strip spent some time floating at the surface of the solution in the test tube, later sinking down to the bottom as the

A rougher candy surface such as, Mentos, means there are more places for bubbles to grow, or more nucleation sites. (brilliant.org) Surfactants are compounds that lower the surface tension between two liquids. (brilliant.org) Dropping Mentos in Coke is an example of a surfactant. The eruptions happen due to nucleation where the Carbon Dioxide in the soda is drawn to the Mentos. (eepybird.com) The pressure of the bottle is trapping the CO2 inside. The CO2 in the soda reacts to the sugar on the Mentos.

According to the hypothesis of the researchers, which of the answer choices best explains why warming the closed bottom stopped the flow of beads?

Hydrogen bonds are weak bonds that form between the atoms of different molecules, serving to hold these molecules together on a somewhat transitory basis. A hydrogen bond is the electromagnetic attraction between polar molecules in which hydrogen is bound to a larger atom, such as oxygen or nitrogen. This is not a sharing of electrons, as in a covalent bond. Instead, this is an attraction between the positive and negative poles of charged atoms.

this explains, that tap water also well regulated as much as the bottled water. In addition, tap water has the same component in the bottled water. (Drinan)

Chemical bonding is responsible for the strong mutual attraction, which prevails between atoms. Atoms are the basic buildings blacks for all types of matter. Atoms are capable of joining together to form molecules, which are responsible for forming most of the objects around us. Atoms forms chemical bonds because lone atoms are extremely reactive and unstable; they form bonds to achieve stability. Our world is made up by so many different elements, and they are responsible for combining together in thousands of different arrangements, in different states of matter, because of a process called chemical bonding. Many atoms, through the process of chemical bonding, lose a few extra electrons to integrate with the octet rule.

Will the effects of cavitation bubbles on non-pathogenic E.coli on an ice cream scoop and the amount sloughed off into the water the scoop will be treated in reduce the amount of bacteria present? The null hypothesis is that neither the water or scoop, when exposed to cavitation bubbles will show a significant decrease in the amount of non-pathogenic E.coli. The alternate hypothesis is that both the scoop and the water, when subjected to cavitation bubbles, will show a significant reduction of E.coli bacteria. The expected outcome is that the cavitation bubbles with be able to destroy a significant portion of the E.coli bacteria present, thus reducing the amount of E.coli that adheres to the ice cream scoop and

Next, fifteen drops of potato juice were added to each test tube. Simultaneously, ten drops of Hydrogen Peroxide (H2O2) were added in all test tubes at the same time. All test tubes were gently shaken to mix the solutions and put to rest. After three minutes, the height of the bubbles of the three test tubes were measured at the same time. Then, the test tubes were exposed to different temperatures.

Based on the data, cinnamon, vanilla, and the control group all had the same height of bubbles at 1 cm. This shows that the cinnamon and vanilla did not increase or decrease the rate of fermentation. This could be because the sugar in cinnamon and vanilla are not glucose or sucrose, which means that these two ingredients could not go through fermentation. Baking Soda spiked up at 1.75 cm because it releases Carbon Dioxide in the presence of acids (sugar). This increased the bubbles because the bubbles are made of Carbon Dioxide.

The distilled used in this experiment was slightly acidic with a pH of 5.27 when water should have been around a pH of 7. This could have been because carbon dioxide in the air may have been absorbed into the distilled water.

Ionic bonding involves electrons being transferred from atoms of a metal to a non- metal, this is a result of the electrostatic attractions which occurs between oppositely charged ions.

Nonpolar covalent bonds are a sort of bond that happens when two iotas impart a couple of electrons to each other. These mutual electrons stick at least two particles together to shape an atom. Like kids who share toys, particles required in a nonpolar covalent bond similarly share electrons. A case of a nonpolar covalent bond is the bond between two hydrogen iotas since they similarly share the electrons. Another case of a nonpolar covalent bond is the bond between two chlorine iotas since they likewise similarly share the electrons. Nonpolar covalent bonds are exceptionally solid bonds requiring a lot of vitality to break the bond.

All tap water in the United States is to be tested annually and the results are sent to the consumers. Tap water taste the same as the more expensive bottled water. Tap water is a healthy way to fulfil your thirst, and you can find it in almost any building. No matter how you buy it water tap or bottled it’s the same regardless. Also tap water taste great, is convenient and is environmentally friendly.

Ionic bonding is a type of chemical bond formed between two ions with opposite charges. Ionic bonds are formed between a metal and a non-metal. Non-metals are stronger than metal and can get electrons easily from the metal. These ions attract each other and create an ionic bond. Ionic bonds are also known as electrovalent bonds. Ionic bonds form their bond when opposite charged ions in a chemical compound have an electrostatic attraction. Even thought Ionic bonds still hold molecules together, they are weaker than covalent

A small amount of bubbles were produced as oxygen was converted from hydrogen peroxide and water by the catalase.