from 0° - 100° C? 20 10 At 30° C‚ 90 g of sodium nitrate Is 0 20 30 40 50 60 70 80 90 100 Temperature (0 °C) dissolved in 100 g of water. Is this solution saturated ‚ unsaturated or supersaturated? tat r 6. A saturated-solution-of-potassium chlorate is formed from one hundred grams of water. If the saturated solution is cooled from 80° C to 50° C‚ how many grams of precipitate are formed? - -0 ’I 4-V I 7. What compound shows a decrease in solubility from 0° to 100°
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for process Waste products - CaCl2‚ calcium chloride - Heat Chemical properties of the main product (Na2CO3) - Forms several hydrates which are used in many ways - It is moderately alkaline‚ so it can neutralise strong acids - Can precipitate many metal ions from solution as carbonates Uses of sodium carbonate - Glass manufacturing (most common use) o Used as a flux gas which lowers the melting point of the silicon dioxide and the calcium carbonate - Soap and detergents o Used
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were performed. The first procedure was by conductimetric titration and by gravimetric determination. The conductivity was analyzed during the reaction between the sulfuric acid (H2SO4) and barium hydroxide (Ba(OH)2). Through the conductivity‚ the equivalence point can be determined; from there‚ the concentration of the Ba(OH)2 solution can be found. The final product of the reaction between sulfuric acid and barium hydroxide is insoluble. According to the lab manual‚ during the reaction‚ the total
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with 20ml of ethyl alcohol along with 20 ml of 25% sodium hydroxide in a 250-mL Erlenmeyer flask. The content was then heated on a water bath whilst gently mixing with a glass rod. After 20 minutes of heating the alcohol scent disappeared denoting the completion of the reaction with pasty mass comprising of soap‚ glycerol and excess sodium hydroxide. After this was done an ice bath was used to precipitate the soap along with 150ml of saturated sodium chloride solution‚ and vigorous mixing. By this the
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Chemistry 11 Final Examination Review - Answers Part A - True or False. Indicate whether each of the following statements is true or false. Correct the false statements. F 1. The mass of an electron is equal to the mass of a proton. The mass of an electron is less than the mass of a proton. T 2. The mass of a proton is approximately equal to the mass of a neutron. T 3. The atomic number represents the number of protons in a nucleus. T 4. The proton has a mass of approximately
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Quantitative Analysis Gravimetric Determination of Iron as Fe2O3 Laboratory Experiment 2 February 19‚ 2013 Abstract: In the Gravimetric determination is the measurement of mass in two different forms precipitation and volatilization. In our experiment we will be using the precipitation form which isolates an ion in a solution by a precipitation reaction‚ filtering‚ purifying by wash method‚ conversion to product of known composition‚ and final weigh of the product comparing the mass
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compounds; • explain the general characteristics of the alkaline earth metals and their compounds; • describe the manufacture‚ properties and uses of industrially important sodium and calcium compounds including Portland cement; the biological significance of sodium‚ potassium‚ magnesium and calcium. • appreciate The s-block elements of the Periodic Table are those in which the last electron enters the outermost s-orbital. As the s-orbital can accommodate only two electrons‚ two groups
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_________________________________________________________________________________________________________________________________________________________________________________________________________________________ Q2. What distinguishes gravimetric analysis from other forms of analysis? ____________________________________________________________________________________________________________________________________________________________________________ Q3. Briefly describe the process
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Scrubber systems In short a scrubber system basically removes harmful materials from exhaust gases before they are released into the environment or atmosphere. There are two types of scrubbing methods. There is wet and dry scrubbing. Both systems work in similar ways and have the same end result. That is to change a toxic chemical into something less toxic or non-toxic. Now scrubber systems rely on a chemical reaction with a sorbent (which is a material that sorbs another substance or A substance
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Gerona‚ Evelyn Chemical Reactions Experiment No. 7 Date Performed: Feb. 17‚ 2014 Date Submitted: Feb. 24‚ 2014 Mrs. Vitancol I. Theoretical Framework A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Classically‚ chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms‚ with no change to the nuclei (no change to the elements present)‚ and can often
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