to a system in regards to concentration‚ pressure and volume‚ temperature or the addition of a catalyst Materials: 1- 150ml beaker 4- 250ml beakers 0.0020M potassium thiocyanate‚ KSCN‚ (aq) 10 drops of Fe(NO3) Crystals of solid KSCN Crystals of solid Na2HPO4 Safety goggles Lab book Sketch of apparatus: Procedure: 1. In the first table‚ write down a description of what KSCN and Fe(NO3)3 look like. 2. Clearly mark the 4 beakers‚ 1 thru 4‚ to ensure
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29.13 g 4.00 mL 3.85 g 6 30.22 g 5.00 mL 4.94 g Data: Density of a Solid 1 Run Mass of Cylinder Initial Volume of Water Final Volume of Volume of Water object 1 29.3 g 4.00 mL 4.00 mL 0.00 mL 2 33.0 g 4.00 mL 4.50 mL 0.50 mL 3 35.5 g 4.50 mL 4.80 mL 0.80 mL 4 39.4 g 4.80 mL 5.40 mL 1.40 mL 5 43.3 g 5.40 mL 5.60 mL 1.60 mL 1 Ciara Clark and Caroline Bedenbaugh 4A Data: Density of a Solid 2 Run Mass of cylinder initial volume of water Final volume of water
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Wood frog-protects its organs by freezing solid. Ice wine-frozen grapes-the shrunken nature of the grapes is due to water loss-the less water in grapes‚ the fewer ice crystals there are to damage the delicate membranes of the fruit. Sugar is a natural antifreeze- this is probably why people developed diabetes during ice age (younger dryas) and people nowadays are more frequently diagnosed with diabetes from November to Freburary‚ when it is colder. Natural selection survival rule-LOSE THE FINGER
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DESIGN LAB Factors Affecting the Solubility of a Solid in a Liquid In this experiment‚ my goal is to determine the affect of temperature in the solubility of a solid in a liquid. Research Question: How does the change in the temperature affects the solubility of a solid in a liquid? Independent variables: Temperature of the Solution Dependent variables: The solubility of the solid substance Controlled Variables: * The pressure of the room. * The mass of zinc chloride
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is methylphenoxyacetic acid‚ a phenolic ether that is prepared from a methylphenol (cresol) and chloroacetic acid. The methylphenoxyacetic acid family is of interest for several reasons: 1) The products are easily prepared crystalline solids‚ which serve as solid derivatives whose melting points can be used to identify the liquid phenol starting materials. 2) Several well-known herbicides are members of this class of compounds‚ especially 2‚4-dichlorophenoxyacetic acid (2‚4-D) and 2‚4‚5-trichlorophenoxyacetic
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Page 1 : E:\CC_Software\Workbench\CC-MW-CD\part2\phasechange\page1.cml 1. List three more everyday examples of phase change. -snow melting and freezing into ice -fuel being changed into gas for cars -ponds freezing over to have a layer of ice Page 2 : E:\CC_Software\Workbench\CC-MW-CD\part2\phasechange\page2.cml 1. Describe the motion of atoms and molecules in a gas. the atoms and molecules bounce off one another each time they come in contact with eachother. they never bond‚ but
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An Introduction to Structure and Types of Solids Categories Crystalline Solids • Highly regular arrangement of atoms‚ ions and molecule • The position of the components are represent by a lattice • It has smallest repeating unit of lattice is called unit cell • Such as diamond‚ salt‚ sugar Amorphous Solid • A noncrystalline solid which their components not organized in lattice pattern. • Such as glass‚ plastic‚ gel Question 1. X rays from a copper X-ray tube (λ = 154) were diffracted at an
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Differentiate between boiling and evaporation. 6.If external pressure decreases ‚ what change will be seen in the boiling point of water? 7.List the various factors which affect the rate of evaporation of a liquid. 8.Give reasons: a) Two solids kept together do not intermix but two miscible liquids or gases intermix fast. b)Clothes dry faster on a dry windy day than on a humid day. c) We sweat more on a humid day than s hot dry day. d) We feel cold when a cologne is sprayed on our
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Analytical Chemistry Daniel C. Harris: 7-4‚ 8‚10‚12‚16 7-4) A 1.000g sample of unknown analyzed by Reaction 7-2 gave 2.500g of bis(dimethylglyoximate) nickel(II). Find the wt% of Ni in the unknown. 7-8) The man in the vat. Once upon a time‚ a workman at a dye factory fell into a vat containing a hot concentrated mixture of sulfuric and nitric acids‚ and he dissolved! Because nobody witnessed the accident‚ it was necessary to prove that he fell in so that the man’s wife could collect his insurance
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effective method for the purification of organic substances‚ provided that the physical properties of a given compound permits its purification in this manner. Solid organic compounds when isolated from organic mixtures or reactions are seldom pure; they are usually contaminated with small amounts of other compounds called impurities. Solid purification by crystallization is based upon different solubility in a given solvent. Simplest crystallization process is done by dissolving the impure substances
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