Stoichiometry of a Precipitation Reaction March 20‚2013 Amber McCollum Introduction Stoichiometry is a branch of chemistry that deals with the quantitative relationships that exist among the reactants and products in chemical reactions To predict the amount of product produced in a precipitation reaction using stoichiometry‚ accurately measure the reactants and products of the reaction‚ determine the actual yield vs. the theoretical yield and to calculate the percent yield. The equation
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conclusions can you note about each of the three reactions that occurred in the test tubes where you combined potassium iodide‚ KI‚ and hydrogen peroxide‚ H2O2 (in part 1) of the experiment? (Give a detailed explanation of any observations that you made‚ i.e.‚ what made the colour change‚ what reactions happened?) ANSWER: 2. Use the information below to develop the necessary calculations for the rate of reaction from the solutions in part B of the experiment • Calculate the initial molarity
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things like watching TV and doing some playing stuff. It becomes obvious they do not like her. So‚ Matilda begins to do some naughty tricks to get their attention. See‚ for example‚ puts super glue in her dad’s hat brim which he cannot get off. Another time‚ Matilda borrows a parrot and stuffs it up the chimney where it sounds like a ghost which makes everyone in the family run out of the house. She learns to pick up things by thinking about them without moving. At one point Matilda picked up a piece
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Investigating the effects of changing concentration: iodine clock reaction. Abstract This is an experiment to show the Iodine Clock Reaction. To create a chemical reaction to see how long it takes for solution to change to a dark blue Color. When changing the concentration of the iodide (K1) and adding distill water to make it up to 5cm³ each time. This is to see if the reaction takes less with less concentration or faster with more concentration added to the peroxodisulphatee. So with the solution
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Name: Brian James|Date:3/10/13| Exp 9: Stoichiometry of a Precipitation Reaction|Lab Section: 73426| Data Tables: Step 3: Show the calculation of the needed amount of Na2CO3 CaCl2.H2O(aq)= m/M =1/147 =0.0068 mol CaCO3(s)=0.0068*1/1 =0.0068 mol CaCO3(s)= CaCO3 (s)= CaCO3 mol *CaCO3 g =0.0068 mol*100.01 g =.68 g Step 4: Mass of weighing dish _0.6_g Mass of weighing dish and Na2CO3 .72_g Net mass of the Na2CO3 .12_g Step 6: Mass of filter paper
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Kinetics of an SN1 reaction: the effect of solvent on rate Object The purpose of this experiment is to determine the rate of hydrolysis in acetone/water (50/50 v/v and 60/40 v/v). Background and Theory An SN1 reaction of tert-butyl chloride takes place in two steps. First‚ the Alkyl Halide will leave the molecule. In this step the bond is breaking‚ which takes a longer amount of time‚ so it will determine the rate of the reaction. As a result‚ it forms a tertiary carbocation‚ since this
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objective: In this experiment‚ I decided to find out how temperature would affect endothermic reactions compared to exothermic reactions. An endothermic reaction absorbs energy in the form of heat. This reaction feels cold because it is taking heat away from its surroundings. It also releases gases. An exothermic reaction is a reaction that releases energy as heat. Since the energy is released‚ the exothermic reactions feel hot. Methods/Materials I did three experiments. I mixed lemon juice and baking
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all your experiences since Day 1 to Day 68. You have to remember the first day when you think you feel all the emotions in the world messed up with you excitement‚ tension‚ curiosity‚ happiness‚ and the like. You have to recall the times that you spent 200 hours each department executive lounge‚ finance‚ and housekeeping respectively. You have to remember that you got lost once because you’re not yet familiar to the intricate maze of the hotel. You have to remember that you need to pass your timesheet
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Today’s laws are not as harsh as Hammurabi’s. They are more civilized. For example‚ none of today’s laws include amputating other people’s body parts. Hammurabi thought it was necessary to amputate arms‚ breasts‚ digits‚ etc. I believe our laws are better‚ overall because they do not incorporate corporal punishment. I think Hammurabi’s Code of Law was an excellent deterrent against crime‚ and very few people would try to break the law. I think this is due to how harsh the laws were. There was zero
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When you think about the character characteristics that characterize an accurate courageous person‚ the hero Beowulf‚ of the epic lyric Beowulf‚ fits every last one of them. He is not bombastic‚ however legitimate and glad in a noteworthy way. Beowulf encapsulates the thoughts of gallantry and courage that is so remarkably lauded. He speaks to the perfect courageous person figure of promptly England‚ where the sonnet was composed. I did‚ then again‚ uncover a downside to the character Beowulf
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