All things considered, the results proved that the unknown substance or element was barium since the calculated density was 3.9 g/mL. To expand upon, the density was calculated by measuring the mass of the metal and using the displacement method to determine the volume of the metal. Also, the best method of disposing the storm water would be to contact a Wastewater Treatment Plant (WWTP) so that they could put it through a purification process, making all that water reusable. Meanwhile, the percent of recovery was calculated by the formula Percent Recovery=observed valuetrue value *100%. Furthermore, according to the pie chart created in the data analysis, the sample given contained of the percent by mass for metal to be 5.2%, salt was 3.3%, wood was 3.1%, plastic was 4.5%, rock was 12.5%, sand was 11.8%, and water was 59.6%.
Pages 96-98 in Chemistry 110 Lab Manual. Wilfrid Laurier University, ON, Canada. Abstract: The purpose of this experiment was to determine the level of purity by using the values for melting point and absorbance and chemically synthesizing aspirin by using phosphoric acid as a catalyst. Pure ASA crystals are isolated from the solution with a Hirsch Funnel that was used with a filter. The melting point of the pure ASA crystals were calculated in order to calculate of absorbance.
- A hydrate is a salt that contains water as a part of its crystal structure. The hydrate used in this lab was Copper (ll) Sulfate Pentahydrate. To heat the hydrate in this lab a crucible is needed. A crucible is a heat resistant container used to heat things to high temperatures. In this lab a mole was used to determine the measurements of all substances.
1: Introduction to a hydrate. What is a hydrate? Why is it called a hydrate? A hydrate is a compound (usually crystalline) where water molecules are chemically bonded to another compound or an element. This is called a hydrate because the substance is hydrated.
When the bicarbonate ions collide with hydrogen ions, it produces carbonic acid. Carbonic acid, then decomposes and creates water plus carbon dioxide. The water and carbon dioxide are incorporated because of temperature. Temperature is the measure of the average heat or thermal
In this experiment, HCl and NaOH will react to form NaOH and H2O with these two steps: The overall reaction is: Both Na+ and Cl- ions combine to form NaCl. H3O+ and OH- ions combine to form H2O. H2O is part of the overall reaction because it is always the product in acid-base neutralization reaction. Based on this reaction, by adding a known base, the amount of acid can
Zeinab Ossaili - 7654795 Synthesis Lab – Experiment 1: Separation By Distillation The objective of this experiment is: • To use simple distillation to purify liquids. • To experience the limits of simple distillation when it comes to separations. • To use fractional distillation to separate mixtures of liquids. Method used: Distillation 1 – Distillation of an organic liquid containing a non-volatile coloured impurity • The distillation apparatus was assembled in regards to the instructions given and this was done by setting up the heating mantle followed by the round bottom flask, the reduction adapter, still head, thermometer adapter and finally the thermometer. • After the above was assembled the still head was connected to the condenser which had the tubing connected to allow water in and out.
Another category of chemical reactions is single-replacement. In a single-replacement reaction, a molecule composed of a cation, or atom with a positive charge, and an anion, or atom with a negative charge, is introduced to a pure element. When mixed together, the anion from the reactant molecule will transfer over to the pure element, causing the original cation to become a pure element. When magnesium metal is placed in hydrochloric acid: Mg + 2HCl --> MgCl2 + H2. Here, it can be seen that the chlorine anion that was a part of the hydrochloric acid is transferred to the pure magnesium, leaving behind hydrogen.
AIM: The experiment is to investigate the effect of the change in the concentration of Hydrogen peroxide and sodium thiosulphate on the rate of reaction between potassium iodide (KI), hydrogen peroxide, Sodium thiosulfate (Na2S2O4) under acidic condition. Introduction: The rate of reaction can be defined as the rate at which the reactants are consumed of the rate at which product is formed. It is the ratio of the concertation of reactant used of concentration product to time, it measured in mol.dm-3.S-1. This can be expressed as Rate of reaction = - (∆[reactant])/∆time = (∆[product])/∆time This implies that the rate of reaction is directly proportional to the concentration of reactant/product but inversely proportional to the
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.
An example of a double displacement reaction occurred between zinc chloride and sodium sulfide to form zinc sulfide and sodium chloride. ZnCl2(aq) + Na2S(aq)= ZnS(s) + NaCl(aq). Ionic reactions occurred between ions in aqueous solution. A reaction occurs when a pair of ions come together to produce at least one of the following: a precipitate, a gas, water, or some other non‐ionized substance. An examples of ionic reactions, if a compound is soluble in water then it should be shown as being in aqueous solution, or left as separate ions.
Purpose and Techniques: This experiment has the aim to determine a chemical formula of hydrated compound, which ingrains cupper, chloride and water molecules in its structure. In order to find this hydrated compound, it is necessary to use the law of multiple proportions. In other word, finding the appropriate variables values to this compound (CxCly*zH2O). Additionally, two major steps are required to proceed the experiment. The first consists to heat a sample to liberate the water hydration, and then compare two mass weights before and after heating so gets easier to find the water percentage (mass).