an underlying purpose in determining the relationship between moles evolved and consumed. This can be demonstrated by measuring the hydrogen gas evolved by performing a chemical experiment when hydrochloric acid reacts with the magnesium. The formulated reaction includes; Mg + 2HCl → H2 + Mg2+(aq) + 2Cl- (aq) The major findings contributing to the experiment is being able to determine and distinguish what moles have evolved thus being the hydrogen moles evolved allowing the magnesium to be consumed
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Muhil Arumugam Gold 3 Calculating the Formula of a Hydrate through Experimentation Purpose The purpose of this lab is to determine the formula of a given hydrate through collecting and calculating experimental data. Data Mass (g) of crucible 29.9g Mass (g) of crucible with hydrate 32.35g Mass (g) of crucible and anhydrous salt 31.39g Questions and Calculations 1. What was the mass of the original hydrate? 2.45g of hydrate Calculations: Mass of crucible with hydrate (32.35g) - Mass of crucible
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Drew Moyer Mrs. Haire IB Chemistry Experiment 6 Mole Ratio in a Chemical Reaction Background: Mole ratios of reactants are often times figured out by the use of the other products in a chemical equation. However‚ in the instance that the products’ mole ratios are unknown‚ it can be determined through the experiment. This method is called continuous variations. In this lab‚ I determined the mole ratio between Sodium Hypochlorite and Sodium Thiosulfate by using continuous variations of ratios
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Chemistry pre- IB Empirical Formula Observations/Qualitative Data: I have used my sense to observe that the magnesium is a solid that is bendable‚ is very light and its color is silver. After being put in a Crucible covered by a lid‚ under a Bunsen burner for a few minutes‚ it has lit up and turned red. After the experiment was over‚ the magnesium was turned into an ash/powdery state and its color became white/grey. Data collection and Processing (DCP): Quantitative Data: Weight in grams
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relative formula mass(for molecule and non-molecule substances)/relative molecular mass(only for molecular substances) 7. n=N/NA(6.02x1023)=m/M If the question is calculate the % composition of each element in BaCo3‚ assume we have 1 mole of BaCo3‚ we have M(Baco3)g=137.3+12.0+3x16.0=197.3g/mol so we have 197.3g Baco3 so 1mol of Ba=…… 8. %element=m(element)/m(compound)x100% 9. Empirical formula-----simplest whole number ratio Metallic elements and ionic substances--- EF=formula Covalent
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Point and Boiling Point Constants | Solvent | Formula | Freezing Point (°C) | Kf(°C/molal) | Boiling Point (°C) | Kb(°C/molal) | Water | H2O | 0.0 | 1.86 | 100.0 | 0.51 | Acetic acid | CH3COOH | 17.0 | 3.90 | 118.1 | 3.07 | Benzene | C6H6 | 5.5 | 4.90 | 80.2 | 2.53 | Chloroform | CHCl3 | –63.5 | 4.68 | 61.2 | 3.63 | Ethanol | C2H5OH | –114.7 | 1.99 | 78.4 | 1.22 | Phenol | C6H5OH | 43.0 | 7.40 | 181.0 | 3.56 | Use the previous formula and the constant from Table 1 to calculate the temperature
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Convert from grams to moles using molar mass. To get moles from grams of potassium chlorate (KClO3): [molar mass = 122.55 g/mol] 138.6 g KClO3 X ( 1 mol / 122.55 g ) = 1.131 mol KClO3 3. Determine the limiting reagent [if necessary] (Use mole ratios to figure out.) * Not necessary to determine because there is only 1 reactant in this decomposition reaction. 4. Use ratios to find the moles of the reactant or product
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of Chemical Reactions Objective In this lab we took Fe(NO3)3 and NaOH and mixed 7 different mole ratios in graduated cylinders to determine what the mole ratio is. We also did the same thing with solutions of CuCl2 and Na3PO4. We determine the mole ratios by graphing the volume of reactant #1 vs. volume of precipitate for each reaction. Data Part 1.) Cylinder 1 2 3 4 5 6 7 Fe(NO3)3‚ 0.1 M‚ ml 5 10 12 15 17 20 24 NaOH‚ 0.1 M‚ ml 55 50 48 45 43 40 36 Fe:OH mole ratio
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Moll Flanders‚ A Fallen Angel Moll Flanders‚ the main character in the book The Fortunes & Misfortunes of the Famous Moll Flanders‚ written by Dafoe‚ is telling her life story in this book. The reader can see how her life rise and fall‚ how she is a maid‚ then become a wife in a rich family‚ up and down‚ and then fall into the criminal world. She is a dynamic character. Her up and down life‚ mostly down‚ causes her character to change throughout the novel. Dafoe has succeed to create a Moll that
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Good evening ladies and gentlemen and welcome to the Apex Club of 2013‚ my name is James Bajjada and tonight‚ I shall discuss and introduce the notion of Australia as a global citizen and the role our country has played in promoting World wide peace‚ security and equality. What is a Global citizenship? Global Citizenship is about understanding the need to tackle injustice and inequality‚ and having the desire to do so. It is about valuing the Earth as precious and unique‚ and safeguarding the future
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