Selective precipitation of the Barium Magnesium Group Chem 112-004 Abstract The purpose of this experiment is to separate and identify the cations of Ba+‚Sr2+‚Ca2+‚ Mg2+ and NH4+ using differences in solubility and confirming test to identify the unknown solution used in this experiment. In this experiment the methodology used by the group is to perform the tests for both the unknown and the cations (Ba+‚Sr2+‚Ca2+‚ Mg2+ and NH4+) using the known as a control for comparison and identification
Premium Solubility Ammonia Magnesium
we had to be weigh it on the electronic pan balance. After weighing beaker 2 we had to shift our focus to the filter paper residue from beaker 1 and we place it onto a dry evaporator dish. Then we had to fill a graduated cylinder with 10 mL of 3.0 M HCL and it had to be poured slowly into the evaporator dish. Once the bubbles had stopped forming we had to decant the liquid into beaker 1 and then we used 5 mL of distilled water to rinse the rest of the sand out of the evaporating dish into beaker 1
Premium Water Chemistry Laboratory equipment
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) Data Booklet 9701/11 May/June 2012 1 hour *6083199800* 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
Premium Education High school College
Chemistry 12 Unit 3 - Solubility of Ionic Substances Chemistry 12 Review Sheet on Unit 3 Solubility of Ionic Substances 1. Identify each of the following as ionic or molecular substances: a) NaCl(aq) ........................................................___________________________________ b) CH 3COOH(aq) ..........................................___________________________________ c) CCl4(l) ...................................................___________________________________ d) HNO3(aq)
Premium Concentration Chemistry Solubility
possible sources of errors. - There are many potential errors in doing the calorimeter experiment. The set up may not be a perfect insulator. There may be a leak of heat inside the reaction since the students opened the test tube while adding the HCl‚ or there is a hole in the styrofoam where heat can escape. This will result to lower ∆H reading. Also‚ there might be an error in preparing the solutions. The chemicals might have been measured more or less than the required value. In addition‚ the
Free Thermodynamics Enthalpy Chemical reaction
Chemistry IGCSE Paper 6 revision guide You can change the temperature and concentration used (not both at the same time though) You need to keep the diameter of the conical flask the same‚ if it is thinner then the cross will disappear sooner‚ the cross also has to be the same‚ volumes too (This set up is mostly if you want to test the gases‚ otherwise you can use the standard set up) The limestone cycle: 1. Burn the limestone
Premium Sodium hydroxide Chlorine Carbon dioxide
limestone was analysed using back titration. A 1.0g sample of limestone was weighed and made into a 50.0mL solution in a conical ask. An excess of 0.395M hydrochloric acid‚ exactly 50.0mL‚ was added and allowed to fully react with the CaCO3 . After this reaction‚ the remaining HCl was titrated with a standard 0.0489M solution of Sodium Hydroxide. The titre was found to be 22.32mL. (Source: Heinemann
Premium Solubility Chemistry Solution
solution of Ca(OH)2 will be made by reacting calcium metal with water‚ then filtering off the solids: Ca(s) + H2O → Ca(OH)2(s) Ca2+(aq) + 2OH-(aq) The concentration of dissolved hydroxide will be determined by acid-base titration with standardized HCl solution. The Ksp for Ca(OH)2 will be calculated from the experimentally determined saturation concentration of hydroxide. Objectives of the data analysis understand solubility equilibria‚ acid-base neutralization‚ and the chemistry of lime (Ca(OH)2)
Premium Chemistry Solubility Sodium hydroxide
reactions‚ also known as synthesis reactions‚ involve the combination of two or more substances into a single new substance: A + B ---> AB Many metal oxides‚ for example‚ absorb carbon dioxide (CO2) from the air to form carbonates: CaO(s) + CO2(g) ---> CaCO3(s) Decomposition Decomposition reactions represent the reverse of the combination process in that one substance breaks down into two or more substances: AB ---> A + B Water‚ or H2O‚ for example‚ decomposes into its constituent elements when subjected
Premium Chemical reaction Energy Temperature
reversible or irreversible. a) And b) Magnesium + hydrochloric acid → magnesium chloride + hydrogen. Reactants products c) Mg – solid HCL –
Premium Chlorine Hydrogen Chemical reaction