1. Solution is a homogeneous mixture composed of only one phase. In such a mixture‚ a solute is a substance dissolved in another substance‚ known as a solvent. Suspension is a heterogeneous mixture in which the particles are large enough to be seen by a microscope or the unaided eye and eventually‚ they settle out of the mixture. A colloid is a substance microscopically dispersed throughout another substance. Unlike colloids‚ suspensions will eventually settle. The suspended particles are visible
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substances naphthalene‚ biphenyl and a mixture of C. Data/Observation Sample | Melting Point Range (°C) | | Accurate trialStart Done | Naphthalene | 81 | 85 | Biphenyl | 71 | 73 | Mixture C | 42 | 56 | Questions: 1. The effect of the impurity on the mixture caused the melting point of the mixture to be lowered. 2. The reason why the melting point of a binary mixture is lowered‚ is due to the fact that the mixture of the two components has caused
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have the same characteristic properties. Therefore‚ we can say that a mixture contains more than one substance. Fig. 2.1: Some consumable items Have you ever noticed the word ‘pure’ written on the packs of these consumables? For a common person pure means having no adulteration. But‚ for a scientist all these things are actually mixtures of different substances and hence not pure. For example‚ milk is actually a mixture of water‚ fat‚ proteins etc. When a scientist says that something is pure
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is matter? Anything that takes up space (volume) and has mass 2. Explain how to classify matter. (Homogeneous‚ Heterogeneous‚ Mixture‚ Pure Substance)? HOMOGENEOUS Matter that is made up of the same or alike particles Can’t see what makes it up Looks uniform HETEROGENEOUS Matter that is made up of different types of particles Can see what makes it up Mixture A material made up of two or more substances that can be easily separated Either Heterogeneous or Homogeneous Ex: Salsa‚ Cake
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2. Put half in a microwave until liquefied 3. How pour mixture mixture or left it flow down the plastic plate down to the finishing place while you time them 4. Do the same to the solid candies 5. record time 6. repeat 2 more times 7. When you are done‚ you might as well eat the candies!! Procedures 1. Put your 4 types of candies into a bowl or a plate 2. Put half in a microwave until liquefied 3. How pour mixture mixture or left it flow down the plastic plate down to the finishing
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Chemistry All about matter There are three different stages of matter: Solid‚ Liquid and Gas Solid (s): Have a certain volume and shape. “Particles” are arranged in a specific crystalline patter and they only vibrate around fixed positions. Liquid (l): Have a fixed volume‚ but not shape. The particles have some freedom and can move around each other. They collide often. Gas (g): Doesn’t have a fix volume or shape. (Takes up the space where it is) Particles move freely in all space available
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Identify that matter is made of particles that are continuously moving and interacting Matter: anything that has mass and occupies space. Exists in three different states: solid (s)‚ liquid (l) and gas (g) The Particle Theory: “All matter is made up of small‚ indivisible particles called atoms that are continuously moving” | Solid | Liquid | Gas | Particle Position | Closely packed.Vibrations only. | Less closely packed.Vibrations and translations. | Widely spread. Rapid translation. | Volume
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For instance‚ Brenda Almond states “Often described as being ‘post- Christian’ phase‚ many Western countries‚ and Britian in patrticular‚ present a picture in which marriage as a basic family structure is visibly on the retreat as cohibitation‚ seperation and divorce expand to fill the void created. The UK provides a model of how life has changed. In Britain in 1979 children under 16 were mostly living with their two married parents. The
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specific melting point‚ within one or two degrees Celsius. This is in opposition to a mixed‚ or contaminated substance‚ which will have a broad melting range. Therefore‚ when we mix our unknown with samples of phenacetin and acetanilide‚ whichever mixture has a more accurate melting point will tell us what our unknown is. It is also important to make sure that the resulting melting points are close to what the proven melting points of the substances are. Reaction Name of substance structure
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components of the Earth contain mixtures Construct word and balanced formulae equations of chemical reactions as they are encountered 1. Build a word equation Reactants on left‚ Products on right 2. Convert word equation into chemical formula for the reactants and products Using valency rules 3. Balance the equation Adjust coefficients to get equal numbers of each kind of atom on each side 4. Specify the physical state for each species present (s) = solid‚ (l) = liquid‚ (g) = gas‚ (aq)
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