The data supports my hypothesis that if the length of the magnesium strip is increased (in millimeters), then the volume of gas (in milliliters) also increases. As the length of the magnesium strip increases one millimeter, the volume of gas increases on average about 7.417 milliliter. This proves that the length of magnesium has a direct impact on the volume of gas after the magnesium is combined with acid. The data also proves that the relationship between the length of the magnesium strip and the volume of gas produced is a linear relationship. The range in the increase of volume of gas is 42-47 milliliters for every five millimeters of magnesium. This shows that the relationship between the milliliters of gas produced is linear (increasing
The ills that McMillan is satirizing are the most common PowerPoint mistakes. He focuses on the incorrect uses of various PowerPoint techniques. For example, he used satire to explain that using excessive bullet points can cause your key messages not to stand out. He also mentioned that putting every word you are going to say in a slide can result in losing your audience’s attention. Additionally, McMillian explained that using too many graphs just to impress your audience is not necessary.
DH=-285.5 kJ/mol. In this investigation, we will be working with potentially dangerous chemicals and safety precautions must be made. Magnesium oxide is a respiratory and eye irritant, the dust must not be inhaled and all work with MgO should be conducted in the fume hood ( Cartwright, 2002). Hydrochloric acid is extremely corrosive, inhalation of the vapor can cause serious injury, ingestion could be fatal, and the liquid can cause severe damage to the skin and eyes; when working with HCl splash goggles and gloves should be worn, and work should be conducted in a well ventilated area (Cartwright, 2002). Materials and Methods --------------------- Goggles - Lab apron - Magnesium oxide MgO - 1g. Lab balance 100mL graduated cylinder Hydrochloric acid HCl - 200mL/.5M. - 2 plastic foam cups - thermometer - cover for cup - Magnesium (Mg) ribbon - 600mL beaker (base for calorimeter) - 400mL beaker (transportation of acid).
The mass of Mg + the mass of O2=mass of MgxOx. Knowing the mass of
Evaluation I think that the method used in the experiment is not very accurate because the way we measure the amount of gas produced is not very
The first step that we took to accomplish our goal was to put on our safety goggles and choose a lab station to work at. We received one 400ml beaker, one polyethylene pipet, two test tubes with hole rubber stoppers, two small pieces of magnesium (Mg), one thermometer and a vial of hydrochloric acid (HCl). We took the 400ml beaker and filled it about 2/3 full of water (H20) that was 18 OC. Then we measured our pieces of Mg at 1.5 cm and determined that their mass was 1.36*10-2 g. We filled the pipet 2/3 full of HCl and poured it into one of the test tubes. Then, we covered the HCl with just enough H2O so that no H2O would be displaced when the stopper was inserted. After inserting the stopper, we placed the Mg strip into the hole, inverted the test tube and placed it in the 400ml beaker. HCl is heavier than H2O, so it floated from the tube, into the bottom of the beaker, reacting with the Mg along the way to produce hydrogen gas (H2). We then measured the volume of the H2, cleaned up our equipment and performed the experiment a second time.
= = = == I predict that as the concentration of the hydrochloric acid decreases the rate of reaction will decrease and therefore the time taken for 75ml of gas to be released will increase.
The melting point for magnesium is 923 K (650°C or 1202°F) and the boiling point is 1363 K (1090°C or 1994°F). Magnesium ions are extremely soluble in water which makes it the third most abundant element dissolved in seawater. The pure element of Magnesium burns and gives off a brilliant-white light, making it a useful ingredient in flashlight photography, flares and pyrotechnics (Gagnon, 2012). Once ignited, magnesium is extremely difficult to extinguish. Attempting to put out the fire using water produces hydrogen, this only intensifies the flames. Magnesium also burns in both pure nitrogen and pure carbon dioxide, so a carbon dioxide fire extinguisher will feed the flames too.
the time it took to fall. We then screwed it up and dropped it from
Why did the chicken cross the Möbius Strip? Well, of course, to get to the same side! Wait, what? Born in 1790, Augustus Ferdinand Möbius would grow up to become a great astronomer and mathematician. Not only this, but his name would be remembered throughout geometry and science as the man who discovered what is known as the Möbius Strip. He discovered the Möbius Strip in September of 1858 and later wrote an article on it in 1865. Although Möbius received the credit, the first person to actually discover both this strange, three-dimensional figure and have the opportunity to publish his findings was Johan Benedict Listing. Listing found it in July of 1858, and established this revelation to the public in 1861. Even so, the base knowledge of this strip have records that date back to ancient times where the mention of something of similar description was made in an Alexandrian manuscript. The Möbius strip or Möbius band is a surface with only one side and contains only one boundary elemental property. The Möbius strip has the mathematical property of being non-orientable. It can additionally be realized as a ruled surface.
I found out that the iron rod picked up many nails when turned on and
The Effect of Temperature of Hydrochloric Acid on the Rate of Reaction Between Hydrochloric Acid and Magnesium
The details with respect to each of these items are discussed in the following sections. All experiments were based on the ability of the method to collect and analyze a 15-L air sample for each concentration tested. The sample preparation and analytical technique used during the method evaluation follow that described in reference 9.4. A revised method (9.1.) is also available.
The Relationship Between Length, Width and Resistance of a Wire Aim: To investigate how the length and width of a wire affects the resistance of the wires. What is the resistance to a s Electricity is conducted through a conductor, in this case wire, by means of free electrons. The number of free electrons depends on the material and more free electrons means a better conductor, i.e. gold has less resistance to the sand. For example, gold has more free electrons than. iron and, as a result, it is a better conductor.
If there is not enough energy no reaction takes place. The sand is In a solution of 0.5M hydrochloric acid, there is less hydrochloric. acid particles compared to that of 2M hydrochloric acid, therefore,. there are less particles to react with magnesium particles thus meaning less chance of collisions between the two reactants. [ IMAGE] Therefore, as the concentration of the hydrochloric acid is increased.
The aim of this investigation is to find out how the length of a wire