Essays Tagged: "Amount of substance"
Gravimetric determination of water in hydrated magnesium chloride
Aim: To calculate the value of n in MgCl2.nH2OTheory: Gravimetric analysis is where the amount of a specific chemical in a material is determined by converting it to a product which can be ... a product which can be isolated completely and weighed. This is relevant to this experiment as the amount of water is an unknown value which is to be found by carrying out the analysis.Heating to con ...
Subjects: Science Essays > Chemistry
"Finding the relative atomic mass of lithium."
Determination of the relative atomic mass of lithiumIntroduction:For this investigation I will determine the Relat ... lative atomic mass (Ar) by using two different methods. In the first method I will dissolve a piece of lithium of a known mass in water, I will then collect the hydrogen gas produced, which can be use ... ill then collect the hydrogen gas produced, which can be used to calculate the relative atomic mass of Lithium. In the second method I will titrate the resulting solution of lithium hydroxide with a k ...
Subjects: Science Essays > Chemistry
Lab Report - The Stoichiometry of an Oxidation-Reduction Reaction
Purpose: To find number of moles of Fe+3 which react with one mole of NH3OH+ in order to partially balance the equation: NH3 ... missing product.Procedure: H2C2O4 and H2SO4 were titrated with potassium permanganate. The molarity of the permanganate was then found because the molarity of the H2C2O4 and H2SO4 were already known. ... ide and ferric sulfate and water was titrated with known potassium permanganate to get the molarity of the hydroxylammonium chloride and ferric sulfate solution, and that was used to find the number o ...
Subjects: Science Essays > Chemistry
Hess's Law
I was given the duty of determining whether or not the worker's story of being burnt is supported by scientific evidence. ... being burnt is supported by scientific evidence. By using calorimetry and Hess's Law, the validity of the worker's claim can be found. The scientist's experiment was compared and evaluated with a sim ... evaluated with a similar one that was accomplished with less substance for safety reasons. 5 grams of NaOH was mixed with 41 ml of HCL. With this reaction, the H can be found by using the equation q= ...
Subjects: Science Essays > Chemistry
Finding Out How Much Acid There Is In A Solution
l.dm-3, then the number of 250cm3 volumetric flasks that make up 1 dm3 must be calculated: 1000 = 4 amounts of 250cm3 in 1 dm3 250 The number of moles of sodium carbonate in 250cm3 is then multiplied ... 943 mol.dm-3. This means that the acid was weaker than the alkali. This would explain why a greater amount of acid was needed than alkali, because more of a dilute solution is needed, than of a concen ...
Subjects: Science Essays > Chemistry
OXIDATION-REDUCTION REACTION OF MAGNESIUM
duction reaction of magnesium and hydrochloric acid solution. We compared the experimental measured amount of a product and the amount predicted by the theoretical calculation of a balanced equation: ... n in the water to equalize the water levels. Once we had accomplished this we took a reading of the amount of gas collected in the cylinder. We repeated this two more times.RESULTS TABLE I: GAS MEASUR ...
Subjects: Science Essays > Chemistry
Determining the Number of Moles of Water of Crystallization Associated With One Mole of Copper (II) Sulfate in a Hydrate CuSO4 * xH2O (s).
. THEORY When certain ionic solids crystallize from aqueous solutions, they combine with a definite amount of water, which becomes a part of the crystalline solid. Salts that contain water as part of ... off, as well the mass of the salt remained was determined. Then using the molar mass of CuSO4, the amount in moles of water and the anhydrous salt was calculated. Finally given the mole ratio, the fo ...
Subjects: Science Essays > Chemistry
The yield from an acid-carbonate reaction
carbon dioxide gas. As the gas is released the mass of the reaction flask decreases. If the initial amount of carbonate (in this case sodium carbonate(Na2C03)) is known, then using the reacting ratios ... le to predict the mass of gas released (the yield).AimIn this activity students will learn that the amount of product from a chemical reaction can be determined, within the limits of experimental erro ...
Subjects: Science Essays > Chemistry