Chemical Earth 1. The living and non-living 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
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1.1.2 Identify the difference between elements‚ compounds and mixtures in terms of particle theory Elements are simplest form substance meaning cannot be decomposed further physically or chemically. They are made up of same type of atoms only e.g. helium‚ oxygen. Compounds are pure and they consist of 2 or more elements bonded chemically (fixed ratio). They can be decomposed chemically. E.g. sodium chloride‚ carbon dioxide Mixtures are the blending (physically combined‚ hence can be separated)
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water molecules producing a transparent blue solution. Stage 2 Precipitation of Copper Hydroxide NaOH solution description Clear transparent aqueous liquid with a similar viscosity to water Notes and observations on the reaction The mixture became gelatinous and the beaker began warming as we added the Sodium
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Substance- A material with a constant composition. Substance is the same no matter where it is found. All elements and all compounds are defined as substances. • Compounds- Substances that are made up of more than one type of atom. Compounds differ from mixtures in that they are chemically combined. Unlike elements‚ compounds can be decomposed or broken down by simple chemical reactions. • Phase- A phase is any region of a material that has its own set of properties. • Homogenous Materials- Any material
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Title: Mayonnaise Aim: To make mayonnaise Abstract: Mayonnaise is a thick‚ creamy sauce or dressing that is made of oil‚ egg yolks‚ lemon juice or vinegar‚ and seasonings. It is an emulsion‚ which is a mixture of two liquids that normally cannot be combined. Mayonnaise is made by combining lemon juice or vinegar with egg yolks. The egg yolk is obtained and10 drops of was added to the egg yolk in a beaker. Oil was then added in a steady stream while whisking. This was done until the oil was completely
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ABSTRACT Separation and identification of components of a mixture was determined by using Chromatography. The components of a mixture have different affinities for a stationary phase as well as different affinities for a mobile phase. INTRODUCTION An extremely common technique by using two chemicals and filter paper can give you sufficient information. A well-done Chromatography of dyes will provide you with enough data to determine if a liquid mixture is heterogeneous or homogenous . In a learning
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Mixtures - Solutions‚ Colloids and Suspensions The table below compares solutions‚ colloids and suspensions. | |Solutions |Colloids |Suspensions | |Appearance |Clear‚ transparent and homogeneous |Cloudy but uniform and homogeneous |Cloudy‚ heterogeneous‚ at least two | | |
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| Takes the shape of the container. | | Compressibility | Negligible compressibility. | Negligible compressibility | High compressibility. | 1.1.2 The living and non-living components of the earth contain mixtures * Identify the difference between elements‚ compounds and mixtures in terms of particle theory The Particle Theory: “All matter is made up of small‚ indivisible particles called atoms that are continuously moving” Elements: simplest and pure substance consisting of same type
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A heterogeneous mixture is one whose components are visually distinguishable from each other. This is usually due to the fact that the particles sizes of the components in a heterogeneous mixture are much larger. Suspensions (like sand stirred up in water) scatter light and will eventually settle out. A salad and a bag of mixed coins could also be considered a heterogeneous mixture‚ since the components are visually distinguishable and easily separated. A bowl of Fruit Loops cereal is a heterogeneous
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to separate a mixture of sand and salt. Materials: Small beaker Electric balance Sand Salt Water Graduated cylinder Stirring rod Filter paper Flask Rubber policeman Wash bottle Funnel Bunsen burner complete with rubber tubing and a source of gas Hot hands Insulator pad Ring stand complete with a ring Wire gauze Striker Pre-lab Questions: 1. Water will be useful in separating the salt and sand because salt is soluble in water‚ which allows it to dissolve into a homogenous mixture‚ allowing for filtering
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