Some scientist’s had this view in the past, which has now been refuted and replaced by more current thinking about how elements are arranged. I agree with Evie that the mass of magnesium goes up and my view is formed from the evidence presented by the results of the experiment carries out, the particle and brick models and findings of various scientists in this field. The mass of magnesium increases when it is burnt. The Magnesium reacts with the oxygen in the air to form the compound - magnesium oxide. The powder that remains will have lost some mass as smoke, but this resultant mass is still more than the mass of the metal that was burnt.
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).
During the combustion reaction the ribbon of magnesium metal is heated, it reacts with oxygen from the air in a crucible, producing magnesium oxide: magnesium + oxygen → magnesium oxide We measure the mass of magnesium we use for the reaction, and the mass of magnesium oxide produced at the end of it, then we can work out the mass of oxygen that has been combined with the magnesium. Hypothesis: As we know, the empirical formula of a compound indicates the simplest whole number ratio of atoms of each element present in it. According to Lewis formula of ionic bonding: ionic bonding and the formula of oxidation reaction of Mg: 2Mg + O2 => 2MgO indicates that in one molecule of a magnesium oxide chemical compound there is only one atom of magnesium and one atom of oxygen, therefore by carrying out the experiment the molar ratio of Mg and O is predicted to be 1:1. Method: The materials used in conducting this experiment are as follows: safety goggles, a porcelain crucible with a lid, a length of magnesium ribbon (about 25 cm in length), emery paper, a laboratory balance, a pipeclay triangle, a tripod, a Bunsen burner, and crucible tongs. 1.
The suffix -ic is given to the compound that contains the cation with the highest charge. To create the formula, you switch the charges, and that tells you how many of each element you will need. For example: Type 2 Ion Stock Name Latin Name Co2+ Cobalt (II) Ion Cobaltous Ion Co3+ Cobalt (III) Ion Cobaltic Ion Type 2 Compounds Stock System Latin System Charge of Metal Original Elements Co2O3 Cobalt (III) Oxide Cobaltic
LAB 7: “Determination of the Specific Heat of Zinc Metal” Objective: Calculate the specific heat of zinc. Introduction: Heat energy in solid is due to the kinetic energy of vibration atoms that make up the materials. As the atoms wiggle about their equilibrium points, they act like springs moving masses back and forth. Even though the masses of these atoms are small, there are a lot of them and all can “store” energy in their motions. We can increase the thermal energy of an object by heating it up.
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.
Also, both mechanical and chemical weathering aid in the development of spheroidal weathering. The first factor that influences the rate at which a rock is able to break down is the rocks characteristics. Rocks consist of minerals, which are solid substances that have their own unique chemical composition. The more reactive a mineral is to elements such as water and oxygen, the quicker it will weather. For example iron reacts to oxygen causing iron oxide to occur.
What is at the difference between light and dark silicate minerals? Dark silicates are rich in iron and/or magnesium and are comparatively low in silica, Light silicates contain greater amounts of potassium, sodium, and calcium. 6. What is the second most common mineral in the crust? Quartz 7.
Low Lindford P3 Data collection: Mass of crucible and lid ± 0.001g | 26.355 | Mass of Mg and crucible and lid ± 0.001g | 26.495 | Mass of MgO and crucible and lid ± 0.001g | 31.382 | Observations: When the Bunsen burner heats the magnesium ribbon, there is a bright flame ignited from it and heat is given off. This resulted in the change in the colour of the magnesium ribbon. The magnesium ribbon began to turn from silvery metal to powdery white solid. Processing of data: Mass of magnesium= 26.495 – 26.355 ± 0.002 = 0.14 ± 0.002g Mass of MgO= 31.382 – 26.355 ± 0.002 = 5.027 ± 0.002g Assumption: All Mg has reacted completely. Mass of O in MgO= 5.027 – 0.140 ± 0.002 = 4.887 ± 0.002g Amount of moles of Mg= 0.140/24.31 ± 0.002/24.31= 0.00576 ± 0.00008 mol
In redox reaction, one element or compound is reduced and gains electrons, while on the other hand, the other element or compound is oxidized and loses electrons. For this lab, through the given oxidation and reduction numbers from balancing the equation and the electrons, it was shown that Manganese was reduced while Iron was oxidized. Also from the equation, the movement of electrons can be noticed, as it was added or subtracted from the substances. In order to balance an equation, there must be same number of elements on both sides, with the exception of hydrogen and oxygen. From there, in order to balance oxygen, water molecules are enumerated to the opposite of the equation/reaction.