compounds conduct electricity as: (3 points) Link: http://antoine.frostburg.edu/chem/senese/101/compounds/faq/print-properties-ionic-vs-covalent.shtml Solids? No Liquids? Yes Aqueous solutions (when the ionic compounds are dissolved in water)? Yes Do covalent compounds conduct electricity as: (3 points) Solids? no Liquids? No Aqueous solutions (when the covalent compounds are dissolved in water)? No Substance Melting
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“Salt”. DO not add anything to the third cup. Mark that cup “Control.” Cover the three cups and store them in a warm place. 3. Observe the cups after two‚ three‚ and four days. Compare how clear the liquid is in different cups. 4. Which cup has the clearest liquid? Which cup has the cloudiest liquid? Record
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Briefly explain the appropriate procedures in handling liquid with a micropipette Basically‚ there are two types of technique used for handling liquid using micropipette. One of them is the forward pipetting and another one is reverse pipetting. The usage of these techniques varies with the type of liquid that will be handled. Forward pipetting normally use for pipetting the aqueous solution‚ acid and alkali‚ volatile compound and also radioactive compound. Forward pipetting has higher accuracy
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Chemistry Chapter 13 Outline Condensed phases: the liquid and solid phases; phases in which particles interact strongly. 13.1 Gas condensed when cooled and compressed. In the liquid state the forces of attraction among particles are great enough that disordered clustering occurs. It is hard to compress a liquid. Liquids diffuse into other liquids with which they are misicible. The natural diffusion rate is slow at normal temperatures. Cooling a liquid lowers its molecular kinetic energy. Solidification
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E:\CC_Software\Workbench\CC-MW-CD\part2\phasechange\page3.cml 1. Record the average number of dashed lines there are per atom of each liquid. the average number of dashed lines are 3-4 per atom 2. Describe the motion of atoms and molecules in a liquid. the atoms are tight and compact‚ they bounce off of each other. they generally dont leave a certain section of the liquid‚ and stay in the same area. 3. How far do the atoms in a liquid appear to travel? Press the "Randomly pick an atom and show its trajectory" button‚ take a snapshot
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The differences in the characteristics of states of matter are given in the following table. S. No. | Solid state | Liquid state | Gaseous state | 1. | Definite shape and volume. | No definite shape. Liquids attain the shape of the vessel in which they are kept. | Gases have neither a definite shape nor a definite volume. | 2. | Incompressible | Compressible to a small extent. | Highly compressible | 3. | There is little space between the particles of a solid. | These particles have a greater
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muslin. Liquid: Put 1 cm3 of the liquid food sample into test tubes. -grease spot test: A drop of liquid food sample was added to a filter paper and was let to dry for 5 minutes. The filter paper was held up to the light and any translucent spot was observed. The filter paper was put into an organic solvent. it was taken out and let to dry The filter paper was examine against light again. (positive result – translucent spot disappears) -Clinistix paper: A drop of liquid food
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Taste/odour masking Potentially good bioavailability Liquid filled capsules –Advantages 1. Dose Uniformity In a powder capsule for potent drug choice the problems are achieving homogenous mix at the required scale of scrutiny. To overcome this problem we could formulate as a solution; 100% homogenous. Filling liquids also avoids problems of poor powder flow; if this occurs during filling‚ can lead to variation of fill weight. (with a liquid‚cV< 1% possible) . 2. Patient safety compliance/consumer
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The solute is the substance that dissolves. The solvent is the substance that does the dissolving. Solutions are homogeneous and do not show the tynall effect. E.g. salt and water. Suspensions They are heterogeneous mixtures of a solid and a liquid in which the solid does not dissolve. Suspensions will settle when left undisturbed. Suspensions will show the tynall effect. E.g. sand and water Colloids They are mixtures with characteristics part way between solution and suspension. Colloids
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Objective: The purpose of experiment of density determination is to determine the densities of regularly shaped object and irregular shaped solids as well liquids. Density equal mass over volume. Materials Used: Materials used in this experiment was a regular shaped object and irregular shaped object and a ruler to take the measurements of the object. A graduated cylinder and electric beam balance were used to measure the volumes and masses of the object. As well 5-20% concentrated were
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