Calculations 1. Determine the molarity of your EDTA solution. Since Zn+ reacts with EDTA in a...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
Calculations 1. Determine the molarity of your EDTA solution. Since Zn²+ reacts with EDTA in a 1:1 mole ratio the moles of EDTA will be equal to the moles of Zn²+. For a solution, moles can be determined by multiplying molarity by volume. mol EDTA = mol Zn²+ MEDTAVEDTA MZn2+VZn2+ rearranging the equation above we get: MEDTA MZn2+VZn2+/ VEDTA = 2. Determine an average value and a standard deviation for your EDTA molarity. You can do this on your calculator or use excel. 3. Calculate the value for total water hardness (amount of Ca + Mg). Following convention, this will be reported in terms of CaCO3 in units of mg/L. The moles of hard water is equal to the moles of EDTA used in the titration. Use the equation MEDTA VEDTA= Mhardwater Vhardwater to solve for the molarity of the hard water and then convert the molarity into units of mg/L using the molar mass of CaCO3 which is 100g and the conversion factor 1000 mg = 1.00 g. For the molarity of the EDTA, use your average value as determined in step 2 above. The equation is as follows: Total Hardness = (MEDTA VEDTA/Vhardwater) (100 g CaCO3/mol)(1000 mg/1g) 4. Calculate the magnesium hardness (reported in terms of CaCO3 in units of mg/L, just like the total hardness). Use the equation that follows. magnesium hardness = total hardness(from step 3) - calcium hardness(given by your instructor) 5. Calculate the magnesium concentration (reported in terms of Mg2+ in units of mg/L). Use the equation that follows. Magnesium concentration = (magnesium hardness(from step 4) × (24 mg Mg2+/100 mg CaCO3) 6. Determine an average value and standard deviation for your magnesium concentration. 7. Determine your percent error. (Get the actual value from your instructor) Trial 2 Initial Buret Volumre? Final Burut Vorduur) Total Volume 1 11.2 ml 11.2 in 2 11. 2 ml 11 ml 3 11.4 ml 11. 2 ml 0.0ml 0.1 ml 0.2 ml Trial Initial Buret Volumine (Final Buret Volume 1 0.0ml 2.0 ml 2 3 0.0 ml 0.0 ml 2.5ml 3.3ml Total Volume 2.0ml 2.5 ml 2.3 ml Calculations 1. Determine the molarity of your EDTA solution. Since Zn²+ reacts with EDTA in a 1:1 mole ratio the moles of EDTA will be equal to the moles of Zn²+. For a solution, moles can be determined by multiplying molarity by volume. mol EDTA = mol Zn²+ MEDTAVEDTA MZn2+VZn2+ rearranging the equation above we get: MEDTA MZn2+VZn2+/ VEDTA = 2. Determine an average value and a standard deviation for your EDTA molarity. You can do this on your calculator or use excel. 3. Calculate the value for total water hardness (amount of Ca + Mg). Following convention, this will be reported in terms of CaCO3 in units of mg/L. The moles of hard water is equal to the moles of EDTA used in the titration. Use the equation MEDTA VEDTA= Mhardwater Vhardwater to solve for the molarity of the hard water and then convert the molarity into units of mg/L using the molar mass of CaCO3 which is 100g and the conversion factor 1000 mg = 1.00 g. For the molarity of the EDTA, use your average value as determined in step 2 above. The equation is as follows: Total Hardness = (MEDTA VEDTA/Vhardwater) (100 g CaCO3/mol)(1000 mg/1g) 4. Calculate the magnesium hardness (reported in terms of CaCO3 in units of mg/L, just like the total hardness). Use the equation that follows. magnesium hardness = total hardness(from step 3) - calcium hardness(given by your instructor) 5. Calculate the magnesium concentration (reported in terms of Mg2+ in units of mg/L). Use the equation that follows. Magnesium concentration = (magnesium hardness(from step 4) × (24 mg Mg2+/100 mg CaCO3) 6. Determine an average value and standard deviation for your magnesium concentration. 7. Determine your percent error. (Get the actual value from your instructor) Trial 2 Initial Buret Volumre? Final Burut Vorduur) Total Volume 1 11.2 ml 11.2 in 2 11. 2 ml 11 ml 3 11.4 ml 11. 2 ml 0.0ml 0.1 ml 0.2 ml Trial Initial Buret Volumine (Final Buret Volume 1 0.0ml 2.0 ml 2 3 0.0 ml 0.0 ml 2.5ml 3.3ml Total Volume 2.0ml 2.5 ml 2.3 ml
Expert Answer:
Answer rating: 100% (QA)
1 The molarity of the EDTA solution can be determined by the following equation M EDTA M Zn2 V Zn2 V EDTA Where M EDTA is the molarity of the EDTA solution M Zn2 is the molarity of the zinc solution V ... View the full answer
Related Book For
Fundamentals of Financial Management
ISBN: 978-0324597707
12th edition
Authors: Eugene F. Brigham, Joel F. Houston
Posted Date:
Students also viewed these chemistry questions
-
Ethene, C2H4, and propane, C3H8, in a 1; 1 mole ratio as gases are burned with 120% theoretical air in a gas turbine. Fuel is added at 25C, 1 MPa and the air comes from the atmosphere,...
-
When bromobenzene reacts with propene in a Heck reaction, two constitutional isomers are obtained as products. Give the structures of the products and explain why two products are obtained.
-
Determine the molarity of each of the ions present in the following aqueous salt solutions fassune 100% ionization) (a) 6.29 MCuBr lons: O Br OBr O Cu D Cu- O Br, [cation")- [anion]-
-
Use the graphs of f and g to solve Exercises 8390. y = g(x) HH y .y = f(x) # X
-
T Mart, Inc., declared bankruptcy. Lets see why. T Mart reported these figures: Requirement 1. Evaluate the trend of T Marts results of operations during 2008 through 2010. Consider the trends of...
-
For the water tank shown in Fig. 4.43, compute the magnitude and location of the total force on the vertical back wall. 8 ft Water 60 15 ft 10 ft
-
For a test of H0: 1 = 2 versus H1: 1 2, the sample sizes were n1 = 15 and n2 = 25. How many degrees of freedom are there for the test statistic? Use the simple method.
-
Dave and Reba Guerrera saved all their married life to open a bed and breakfast (B&B) named Tres Amigos. They invested $100,000 of their own money and the corporation issued common stock to them. The...
-
Jolla is a commercial cleaner of office buildings. She has been doing this for 15 years. When she first began she had lots of contracts but for the last 9 years she has cleaned on building only, an...
-
The result of x(t)*23(t-2) is * O x(1) O s(t-2) O 26(t-2) O can not be determined O x(t-2) O 2x(t-2)
-
Linda Company is a merchandiser that sells a total of 15 products to its customers. The company provided the following information from last year: Product Unit Sales Selling Price Variable Cost per...
-
Choose a CEO of a multinational firm that they believe exemplifies the positive aspects of strategic leadership. What actions does this CEO take that demonstrate effective strategic leadership? What...
-
Big-Oh and Run Time Analysis: Describe the worst case running time of the following pseudocode functions in Big-Oh notation in terms of the variable n. 3. public static void silly(int n) { for (int i...
-
At December 31 Assets Simon Company's year-end balance sheets follow. Current Year 1 Year Ago 2 Years Ago Cash Accounts receivable, net $ 32,368 93,813 $ 38,971 68,198 $ 38,230 53,075 55,965...
-
Renewable Energy Manufacturing Ltd is a leading manufacturer of solar panels. The following data are taken from its accounting records for the financial year ending 31 December 2022: $ Sales...
-
Suppose five years from now that the ranching industry is in long-run equilibrium at 70 cents per pound. Then, suppose a new hormone shot is developed at Texas A&M University that allows all ranchers...
-
Use critical values to test the null hypothesis H0: 1 2 = 20 versus the alternative hypothesis H0: 1 2 20 by setting a equal to .10, .05, .01, and .001. How much evidence is there that the...
-
Marble Construction estimates that its WACC is 10% if equity comes from retained earnings. However, if the company issues new stock to raise new equity, it estimates that its WACC will rise to 10.8%....
-
Use the foreign exchange section of a current issue of The Wall Street Journal to look up the three currencies in Problem 19-8. What is the current exchange rate between Swedish kronas and pounds?
-
Use the foreign exchange section of a current issue of The Wall Street Journal to look up the six currencies in Problem 19-5. a. What is the current exchange rate for changing dollars into 1,000...
-
What are the properties of instantaneous centre?
-
A chain with three links is shown in Fig.1.7. Prove that the chain is locked. 2 3 1 Fig.1.7 Three-bar chain
-
Differentiate between a mechanism and a machine.
Study smarter with the SolutionInn App