Department of Chemistry Physical and Chemical Properties Submitted by: Date Submitted: 2/2/2014 Date Performed: 1 Lab Section: Course Instructor: PURPOSE: To identify chemical and physical change in matter. PROCEDURE: Finding out the physical and chemical change in matter. There was seven different substances that were being tested; Mossy Zinc (Zn)‚ Magnesium (Mn)‚ Copper (Cu)‚ Magnesium Oxide (MgO)‚ Copper II Nitrate (Cu(NO3)2)‚ Copper II Carbonate (CuCO3) and Sodium Chloride
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Chemical Reactions- Sodium Hydroxide A chemical reaction is a change where two or more substances are changed into a new substance. You can identify a chemical reaction by colour change‚ effervescence (bubbles)‚ when light or heat given off‚ and the change is usually irreversible. There are 6 main types of chemical reactions- combustion (often called burning)‚ synthesis‚ decomposition‚ neutralization‚ single replacement and double replacement. A combustion reaction is a reaction with oxygen‚ and
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or a base by using litmus paper or a pH strip. For the rest of the experiment‚ if the substance is being handled‚ gloves and goggles must be worn. Use a clean and dry Erlenmeyer flask and weigh it. Then‚ some of the unknown will be measured and poured into the flask. Also way the flask and the unknown. Add distilled water and phenol saline to the flask. Set that aside to prepare the biuret. Choose the substance that will be used as the titrant which will be put into the biuret. Clean out the bureau
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CHM1022 Tutorial 2 – Semester 2‚ 2012 (Chemical Equilibria) 1. The reaction 2 HCl(g) +I2(s) [pic] 2 HI (g) + Cl2(g) has Kc = 1.0 x 10-34 at 25˚C. If a 1.00 L reaction vessel initially contains 0.100 mol of each HCl and solid I2‚ what are the concentrations of HI and Cl2 at equilibrium? 2. Consider the following gas-phase reaction and equilibrium constant at 25 oC: 4 HCl(g) + O2(g) [pic] 2 Cl2(g) + 2 H2O(g) The concentrations of all species were measured at a particular
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graders figuring out what was in a Mystery Mixture only using nine chemicals. Eighth grade scientist were told that we needed to advance their learning. They had to look at all of the physical properties and think which ones it could be and which ones it was not. When they finally got to test the chemical properties they saw a better idea of what it could be or not. Then the eighth grade scientist got to test the temperature of the chemical reaction and by that time it was clear what it was. The students
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Chemical equilibrium is the point at which the concentrations of reactants and products do not change with time. It would appear as if the reaction has stopped‚ but in fact‚ the rates of the forward and reverse reactions are equal‚ causing the reactants and products to be created at the same rate. This can be expressed mathematically in the form of the equilibrium constant. The following is the general equation for a reversible chemical reaction: aA+bB →cC+dD
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Class X Question 1: Chapter 1 – Chemical Reactions and Equations Science Why should a magnesium ribbon be cleaned before burning in air? Answer Magnesium is very reactive metal. When stored it reacts with oxygen to form a layer magnesium oxide on its surface. This layer of magnesium oxide is quite stable and prevents further reaction of magnesium with oxygen. The magnesium ribbon is cleaned by sand paper to remove this layer so that the underlying metal can be exposed into air. Question
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Chemistry: A Molecular Approach (Tro) Chapter 10 Chemical Bonding II: Molecular Shapes‚ Valance Bond Theory‚ and Molecular Orbital Theory 1) Determine the electron geometry (eg) and molecular geometry(mg) of BCl3. A) eg=trigonal planar‚ mg=trigonal planar B) eg=tetrahedral‚ mg=trigonal planar C) eg=tetrahedral‚ mg=trigonal pyramidal D) eg=trigonal planar‚ mg=bent E) eg=trigonal bipyramidal‚ mg= trigonal bipyramidal Answer: A 2) Determine
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Ball Mill is an efficient tool for grinding many materials into fine powder.ball mill also belongs to Grinder mill .The Ball Mill is used to grind many kinds of mine and other materials‚ or to select the mine. It is widely used in building material‚ chemical industry‚ etc.we aslo have Powder mill .There are two ways of grinding: the dry way and the wet way. It can be divided into tabular type and flowing type according to different expelling mine. We have Vsi Crusher and mobile crusher.To use the Ball
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There are many types of material engineers including ceramic‚ chemical‚ composites‚ glass‚ industrial minerals‚ metals‚ plastics‚ polymers‚ rubber‚ and textile engineers. With 60% of material engineers working in factories………… another benefit too a material engineer is there salary which at average is 87‚790 and expected to rise by 3.6%. Areas of specialization A material engineer is a very diverse job which includes ceramic‚ chemical‚ composites‚ glass‚ industrial minerals‚ metals‚ plastics‚ polymers
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