Lab experiment 12 Percent of water in a hydrate The goal of Experiment 12 was to learn how to calculate the percent of water (by mass) in barium chloride and an unknown hydrate salt‚ as well as properly calculating the water of crystallization for the unknown hydrate salt. A hydrate salt is composed of anions (-) and cations (+) surrounded by a fixed number of water molecules‚ called water of crystallization. The hydrate decomposes upon heating and
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2013 Percent Yield of Calcium Carbonate Introduction: The purpose of this experiment is to examine the percent yield of a precipitate in a double displacement reaction. A solution of calcium citrate and sodium carbonate were mixed together‚ then the products were filtered out as so only the precipitate remained. The filtered paper was then dried and the mass of the precipitate in the experiment divided by the theoretical mass of the precipitate from the calculated gave the percent yield.
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Fin 3320 Practice Questions1 – Total Course 1. Your wealthy uncle has set up a special account that will give you $500‚000 on your 35th birthday. Assuming you are age 21 (thus 14 years from receiving this)‚ what is the present value of this gift if the appropriate discount rate is 8.0%? (Ch5) a. $170‚231 b. $282‚449 c. $442‚619 d. $191‚206 e. $734‚664 2. You need $10‚900 for the down payment on a new car. You presently have $5‚000 in savings for which you expect to earn 6% (annual rate‚ compounded
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A. 7.89 percent B. 8.56 percent C. 9.43 percent D. 9.90 percent E. 10.02 percent Expected return = (0.05 0.02) + (0.70 0.09) + (0.25 0.14) = 9.90 percent 32. You own a portfolio that is invested as follows: $11‚600 of stock A‚ $7‚800 of stock B‚ $14‚900 of stock C‚ and $3‚200 of stock D. What is the portfolio weight of stock C? A. 38.47 percent B. 39.73 percent C. 41.26 percent D. 41.94 percent E. 43.08 percent WeightC = $14‚900/($11‚600 + $7‚800 + $14‚900 + $3‚200) = 39.73 percent 34. You have
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Percent By Mass Solution Problems 1. What is the percent by mass of a solution made by dissolving 0.49 g of potassium sulfate in 12.70 g of water? 2. What is the percentage concentration of 75.0 g of ethanol dissolved in 500.0 g of water? 3. A chemist dissolves 3.50 g of potassium iodate and 6.23 g of potassium hydroxide in 805.05 g of water. What is the percentage concentration of each solute in the solution? 4. A student wants to make a 5.00 % solution of rubidium chloride
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| Percent Yield Lab | | | | 4/20/2012 | Mrs.Sardella Per4 Matt ‚ Kait Mrs.Sardella Per4 Matt ‚ Kait | Introduction *Limiting Reactant: A reactant that is completely consumed during a chemical reaction‚ limiting the amount of product that is produced. *Excess Reactant: A reactant that remains after a reaction is over. *Theoretical Yield: The amount of product that is predicted by stoichiometric calculations *Actual Yield: The amount of product that is recovered
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Unit 7 Final Project Part 1 One concept that I have chosen is percentages. A percent is a fraction that has a denominator of 100. Finding the percent of a number‚ and finding the missing percent could be very useful in the profession that I have chosen. The profession that I would like to pursue is accounting. Using percentages is used in many ways in accounting. One way is to do a trend analysis. A trend analysis calculates the percentage change for one account over a period of time of two
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President Abraham Lincoln began to develop his plan for reconstruction. Lincoln wanted to reassemble the North and South after the war ended. Lincolns game plan for Reconstruction included the Ten-Percent Plan. The Ten-Percent Plan stated that a state in the south could be reaccepted into the Union once ten percent of its voters testified an oath of allegiance to the Union. Delegates were then elected by voters to establish new state governments and draft revised state constitutions. On May 29‚ 1865‚ Johnson
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Percent Error occurs due to many factors. In this lab by the graph I can state that there was a 100% error in all three unknown substances‚ Pure Leaf Lemon Tea‚ Sprite‚ and Tree Ripe Lemonade. This could be a result of not having properly zeroed the scale or the scale glitching when it came to zeroing it‚ which would have added extra mass and skewed the results. Another factor that could have resulted in a high percent error would have been the scale itself glitching which would have caused the wrong
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Description Whenever we do experiments‚ the actual result is a little different from the result we predicted. In chemistry‚ this discrepancy is compared by calculating the percent yield. In this lesson‚ we will define percent yield‚ and go over a few examples. !!!What is Percent Yield? Sometimes you look at a recipe and it says how many servings it will make if you follow the amounts listed on there. There are times‚ however‚ that the number of servings after you have made the food is not the
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