Background: Sulfuric acid (H2SO4) is a diprotic acid (can donate 2 protons to a base). Sulfuric acid ionises in water in two stages: HSO4-(aq) + H2O(l) SO42-(aq) + H3O+(aq) H2SO4(l) + H2O(l) -----> HSO4-(aq) + H3O+(aq) Sulfuric acid is a strong acid (complete dissociation in water, Ka approaches infinity). Sulfuric acid reactions: Sulfuric acid + metal
The Magnesium strip dissolved in the process and the test tube got hotter. gas test observations: The Hydrogen burned up in the test tube causing a loud pop|The final products were Hydrogen gas and MgCl (a clear/transparent liquid).| |Mg|A shiny opaque metal. -Grey/metallic||| Discussion Questions 1. Identify the reaction in procedure steps 3 and 5 as endothermic or exothermic. Explain why.
When the solution is acidified during diazotization to form nitrous acid, the sulfanilic acid is precipitated out of solution as a finely divided solid, which is immediately diazotized. The finely divided diazonium salt is allowed to react immediately with dimethlaniline in the solution in which it was precipitated. Mechanism Diazotization: [pic] Diazo Coupling: Methyl orange is often used as an acid-base indicator. In solutions that are more basic than pH 4.4, methyl orange exists almost entirely as the yellow negative ion. In solutions that are more acidic than pH 3.2, it is protonated to form a red dipolar ion.
When dynamite explodes, it causes an exothermic reaction. This means that the reaction causes light and heat to be produced. When heat or pressure is added to the product, it explodes and produces water, nitrogen and oxygen. The explosion of nitroglycerin can be classified as a decomposition reaction. Nitroglycerin breaks down after being pressurized or exposed to heat.
When LiCl is burned the color of the light is an intense red. When BaCl2 is burned the energy is released in packages of light which its color is yellow-green. When BaCl2 is burned the energy is released in packages of light which its color is yellow-green. Data Table 2: Data processing | Metallic Element | Hypothesis | Observation | Sodium ChlorideNaCl | I though that the light of the energy release was going to be red. Because the number of electrons in this compound is no too high in comparison of other compounds.
Dipole-dipole forces are permanent dipoles due to different electronegativity. Hydrogen bonding is a strong dipole that forms when H bonds to N, O, or F. [7] Nitric acid (HNO3) is a colorless, toxic, oxidizing, and corrosive liquid commonly used as laboratory reagent and for the manufacture of fertilizers and explosives. [8] It is completely miscible and has a dipole moment of 2.17D[2]. It contains one hydrogen bond and is a polar molecule. Water (H2O) is colorless liquid that’s the basis of life on Earth.
If a firework isn’t packed right, it won’t shoot off into the night sky. The power needed to lift each firework into the air is provided by the highly exothermic combustion of black powder, a slow burning combination of 75% potassium nitrate, 15% charcoal, and 10% sulfer(Conkling J. 1985). As soon as the shell reaches the perfect height, it is then that it explodes. During the explosion not only are gases produced quickly, but they are also hot, and they expand rapidly, according to Charles’ Law, which states that as the temperature of enclosed gas increases, the volume increases, if the pressure is consistent(Antonis, K. 2010).
It is the one that we used in our experiment. Catalase will only work with Hydrogen Peroxide. It speeds up the breakdown of this toxic chemical into water and oxygen (2H202 (l) --->2H2O2 (l) +O2 (g)). Catalase is important because it breaks down Hydrogen Peroxide. Hydrogen Peroxide at high concentrations can be lethal.
This reaction is carried out by adding a solution of reactant hydrochloric acid from a burette to a solution of sodium hydroxide until just sufficient of hydrochloric acid has been added to react with all of the sodium hydroxide. If the concentration and volume of hydrochloric acid is known the number of moles of sodium hydroxide can be calculated, if the equation for the reaction is known. This procedure is known as a titration and the point at which sufficient volume of hydrochloric acid has been added to the sodium hydroxide to complete the reaction is called the end point. An indicator which changes colour at the equivalence point is often used to indicate the titration end point. This standardized solution of sodium hydroxide can then be used to determine the concentration of acid in the sample of gastric juice.
The former cause may be detected by an increase in the acid value of the sample. Auto oxidation at fatty acid double bonds occurs by reaction with molecular oxygen present in the atmosphere, causing the formation of labile peroxides. The peroxides formed during auto oxidation are unstable and decompose into free radicals .These initiate chain reactions which lead to eventually to decomposition of the fatty acid into various low molecular weight aldehydes and ketones. Aldehydes and ketones react with phloroglucinol developing a red color which would mean that the oil is rancid Emulsification of Oil: When oil and water, which are immiscible, are shaken together, the oil is broken up into very tiny droplets which are dispersed in water. This is known as oil in