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
-
The King Carpet Company has $3,000,000 in cash and a total of $12,000,000 in current assets. The firms current liabilities equal $6,000,000 such that the firms current ratio equals 2. The companys...
-
In a chemical process the amount of a certain type of impurity in the output is difficult to control and is thus a random variable. Speculation is that the population means amount of the impurity is...
-
Juliette Shulof Furs (JSF) was a New York corporation that had been in the fur-dealing business for 15 years. George Shulof, an officer of JSF, attended two auctions conducted by Finnish Fur Sales...
-
Pennington Company has a balance in its Accounts Payable control account of $9,250 on January 1, 2014. The subsidiary ledger contains three accounts: Hale Company, balance $3,000; Janish Company,...
-
A 15 kg box is given a shove to the right on a horizontal, rough surface. After the hand loses contact, the box's acceleration (using standard directions) is a = (-1.2 m/s, 0). (a) What are the...
-
Prepare a purchases return (journal) book from the following transactions for April 2017. 2017 April 05 10 17 28 Returned goods to M/s Kartik Traders Goods returned to Sahil Pvt. Ltd. Goods returned...
-
money incampai money in campaign and elections (SHUJAA DON'T TAKE THIS QUESTION YOUR ALL ANSWERS ARE WRONG YOU WASTR MY QUESTIONS )
-
Question 1 An equity analyst is valuing a listed company that is expected to generate EBIT from year 1 onwards as given in Table 1. Table 1 Year 1 Year 2 Year 3 Year 4 Year 5 10000 12500 12850 13750...
-
an achieved status that u hold. How did this achieved status become a part of u r identity? please add refrences
-
Based on your work, did you discover any additional or different risks that you had not already identified in the list you developed in Part 1 of the case? For purposes of this question only, assume...
-
For the following problem, identify where the function is increasing or decreasing and use the First Derivative Test to find any local extrema. Verify your solutions graphically. f(x)=3x-5x +7
-
Consider the function defined as follows 1 1(k) = for k1. k(k+1) a) Determine the partial sum Un = k=1(k). b) Calculate limn Un c) Verify that is a probability mass function. Let X be a random...
-
Consider a T-bill with a rate of return of 6% and the following risky securities: Security A: E(r) = 9%; Standard Deviation = 9% Security B: E(r) = 10%; Standard Deviation = 11% security C: E(r)=...
-
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...
-
Powerhouse Ltd purchased machinery on 2 January 2019, at a cost of $800 000. The machinery is depreciated using the straightline method over a useful life of 8 years with a residual value of $80 000....
-
The purchases and sales of Big Flower Pty Ltd of one brand of lawn fertiliser for the year ended 31 December 2019 are contained in the schedule below. The selling price up to 30 June was $12 per unit...
-
In groups of four or five, consider the following information. On 1 July 2019, Stevenson Pty Ltd, a proprietary company with three shareholders, acquired some property by issuing 100 000 shares to...
Study smarter with the SolutionInn App