When the dry pressure is determined, the volume of the gas at STP can then be determined and what the experimental volume of one mole of the gas would be at STP. 1. Put on the necessary safety gear, including safety goggles and a lab coat/apron. 2. Cut a piece of magnesium
Portland cement mixed with sand, gravel and water, a process called hydration, is how concrete is created. Crushed stone aggregate fine and coarse aggregates make up the bulk of a concrete mixture. Durability of concrete may be defined as the ability of concrete to resist weathering action, chemical attack, and abrasion while maintaining its desired engi-neering properties. Different concretes require different degrees of durability de-pending on the exposure environment and properties desired. For example, concrete exposed to tidal seawater will have different requirements than an indoor concrete floor.
Introduction During this experiment, the mass of copper was weighed in grams. It was measured with sodium hydroxide, sulfuric acid, zinc, hydrochloric acid, methanol, and acetone. The main instruments used in this experiment was a balance, beaker, stirring rod, evaporating dish, wire gauze, ring stand, graduated cylinder, copper wire, nitric acid, hydrochloric acid, water, sodium hydroxide, zinc, sulfuric acid, and a hot plate. By finding the raw data, the percent recovered was able to be calculated. Theory The equation that was used in this experiment is % recovered = 100% X m/m0.
Reactivity of Metals in Single-Replacement Reactions A lab was conducted to test the reactivity of metals in single-replacement reactions. This lab was done to solve the problem of which metals will replace each other in single-replacement reactions. A single replacement reaction is a type of oxidation-reduction chemical reaction when an element or ion moves out of one compound and into another. It was presumed before the experiment that the location of the metal on the Activity Series chart would thus determine the reactivity of the metal. Copper, magnesium, iron, and zinc were all tested in the same five solution compounds; which included hydrochloric acid, sulfate, magnesium chloride, iron chloride, and zinc chloride.
The chemical reactions can be found below in Table 2.8 The amount of copper metal extracted from the 0.9899 g sample of malachite was measured to be 0.5682g. The theoretical yield of copper metal was calculated to be 0.5690 g. The percent yield was calculated to be 0.135%. The sample calculations for theoretical yield and percent yield can be found after Table 3. At the conclusion of heating the malachite, the hammer test and the resistance test were performed on the samples of copper to test their physical properties as compared to pure copper metal. The hammer test was performed to see if the sample was malleable since pure copper can change shape easily when force is applied.
Procedure : In this test method, the ultrasonic pulse is produced by the transducer which is held in contact with one surface of the concrete member under test. After traversing a known path length Q in the concrete, the pulse of vibrations is converted into an electrical signal by the second transducer held in contact with other surface of the concrete member and an electronic 2 timing circuit enables the transit time (T) of the pulse to be measured. The pulse velocity (V) is given by : V = L/T 8.3.2 Ultrasonic Pulse Velocity Method This method involves the measurement of velocity of electrostatic pulses passing through concrete from a transmitting transducer to a receiving transducer. The pulse also can be generated by hammer blow. The pulse generator circuit consists of electronic circuit for generating pulses and a transducer for transmitting these electronic pulses into mechanical energy having frequency 15 to 50 kHz.