Experiment 5 Determination of Empirical Formulas of Hydrate and Oxide Compounds Room #216 Locker# 1137 Date of Experiment: May 11‚ 2014 Date of Submission: May 16‚ 2014 Purpose: To determine the identity of an unknown hydrated salt calculating the percent water loss after heating and also to determine the empirical formula of magnesium oxide. Results: Table 1: Determination of the mass of waters of hydration of an unknown hydrated compound. Hydrated Compound code: C-14 Mass
Premium Chemistry Molecule Water
NSS Chemistry Part 3 Metals HKCEE Past Paper Questions – Structural Questions 1. HKCEE 1995 Q1 Rubidium (Rb) and potassium belong to the same group in the Periodic Table. The relative atomic mass of rubidium is larger then that of potassium. (a) Explain whether rubidium is more reactive than potassium. (b) Write a chemical equation for the reaction between rubidium and water. (State symbols should be given.) (c) Suggest how rubidium can be stored safely in the laboratory.
Premium Magnesium Oxygen
characteristics of the alkaline earth metals and their compounds; • describe the manufacture‚ properties and uses of industrially important sodium and calcium compounds including Portland cement; the biological significance of sodium‚ potassium‚ magnesium and calcium. • appreciate The s-block elements of the Periodic Table are those in which the last electron enters the outermost s-orbital. As the s-orbital can accommodate only two electrons‚ two groups (1 & 2) belong to the s-block of the Periodic
Premium Lithium Calcium Metal
Basseterre. His financial advisor Tyrah‚ has discovered a new technique for boosting company profit. If the company can cheaply extract the pure form of a new metal M from its oxide‚ the metal could be sold at 3x the price of production. What is the empirical formula of this oxide‚ given the following: Total mass of metallic oxide: 80.763 g Mass of metal is 74 % of the total mass (It was later discovered the new metal held 11 protons‚ 12 neutrons & 11 electrons) 4. Mr. Collins went home and wanted
Premium Molecule Hydrogen Chlorine
parameters‚ P‚ V‚ n and T through the experiment. Equipment and Materials: Large beaker Ring stand Clamp Copper wire 100 mL eudiometer tube Magnesium (Mg) ribbon M6 H2SO4 (Sulfuric Acid) Wash bottle filled with distilled water Procedure: First I cut a piece of Mg ribbon and used steel wool to rub off the MgO (magnesium oxide). I then used the scale to determine when I had approximately 0.0440g of Mg. I then wrapped the Mg with copper wire so that none was showing‚ but left a
Premium Covalent bond Ionic bond Pressure
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 0620/01 October/November 2008 45 Minutes *6400528663* READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the
Premium Oxygen Chlorine Hydrochloric acid
Experiment: The Empirical Formula of an Oxide Authors: Section Number: Chemistry Location and Date II. Abstract The aim in this lab was to determine the empirical formula of an oxide of magnesium through combustion in air. This was achieved by heating an established mass of magnesium in air inside of a crucible‚ ultimately attaining a compound that contained Mg and O. The major result of the experiment was the empirical formula of the oxide of magnesium. III. Introduction An empirical formula
Free Oxide Oxygen Chemistry
What is the total number of atoms in (NH4)2SO4? (1) 10 (2) 11 (3) 14 (4) 15 22. Write the correct formula for the following binary ionic compounds. (a) Lithium fluoride LiF (b) Calcium oxide CaO (c) Aluminum nitride AlN (d) Beryllium chloride BeCl2 (e) Potassium iodide KI (f) Aluminum oxide Al2O3 23. Write the correct formula for the following binary molecular compounds. (a) Carbon monoxide CO (b) Boron tribromide BBr3 (c) Sulfur hexafluoride SF6 (d) Carbon dioxide
Free Oxygen Oxide Aluminium
Semester – CH 2307 TECHNICAL ANALYSIS LAB -2010 INDEX SHEET CYCLE ONE Date of Condn. Date of Subn. Sign 1 Estimation of COD of the given sample of water. 2 Estimation of Manganese in the given pyrolusite ore. 3 Estimation of Magnesium by EDTA method. 4 Estimation of purity of drug using pH meter. 5 Estimation of Ammonia in ammonium salts. 6 Polarimetric estimation of sugar CYCLE TWO Date of Condn. Date of Subn. Sign 7 Estimation of Phosphorous
Premium Ammonia Acetic acid Magnesium
Formula of oxide Na2O2 MgO Al2O3 SiO2 P4O10 Cl2O Melting Point (C) 460 2825 2072 1700 340 -120.6 Boiling Point (C) 657 3600 2977 2230 360 2.2 State at STP Solid Solid Solid Solid Solid Liquid Action of water Dissolve in water and form alkaline solution Slightly dissolve in water and form alkaline solution Insoluble in water Insoluble in water Dissolve in water and form acidic solution Dissolve in water and form acidic solution pH of aqueous solution
Premium Ionic bond Oxygen Oxide