Why is the solution boiled just before reaching the point of equivalence in the carbonate determination...
Why is the solution boiled just before reaching the point of equivalence in the carbonate determination and name two other indicators other than bromocresol green that could be used in this experiment (determination of sodium carbonate in soda ash)?
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Why is the solution boiled just before reaching the point of
equivalence in the carbonate determination...
Name Section/CRN EXPERIMENT 9 POTENTIOMETRIC DETERMINATION OF AN EQUILIBRIUM CONSTANT PRE-LABORATORY QUESTIONS The following preparatory questions...
Name Section/CRN EXPERIMENT 9 POTENTIOMETRIC DETERMINATION OF AN EQUILIBRIUM CONSTANT PRE-LABORATORY QUESTIONS The following preparatory questions should be answered before coming to lab. They are intended to introduce you to several jdeas that are important to aspects of the experiment. You must turn in your work to your instructor before you will be allowed to begin the experiment. Potassium acid phthalate, KHP (KHC4H&O4), is a primary standard reagent used to determine exactly the concentration of a solution of base, such...
Before the equivalence point: After the equvalence point: Now, calculate the concentration of apotransferrin present in...
Before the equivalence
point:
After the equvalence point:
Now, calculate the concentration of apotransferrin present in
the original 1.00 mL solution. ________ M Apotransferrin
The protein apotransferrin binds two Fe(lll) ions for cell transport. Consider when a 1.00 mL solution of apotransferrin is titrated with 102 muL. of a 1.72 M Fe(lll) solution. The initially colorless solution turns red, and the color change can be measured with a spectrophotometer. First, explain why there is a difference in spectrophotometric response during...
Electrogravimetric determination of Copper: 1. Why the sample solution is blue colored? Why do the electrodes have t...
Electrogravimetric determination of Copper: 1. Why the sample solution is blue colored? Why do the electrodes have to be as close as possible? 2. Using your textbook explain why does the experiment take so long? 3. Identify three factors that influence the physical characteristics of an electrolytic deposit. 4. What where the acids used in the acidic digestion? Why the experiment requires a mixture of acids? rather than a single one? 5. Why is important to avoid mixing acetone with...
Please show all work ! Experiment 9 Conductometric Titration and Gravimetric Determination of a Precipitate REPORT...
Please show all work !
Experiment 9 Conductometric Titration and Gravimetric Determination of a Precipitate REPORT SHEET Name: DATA TABLE Trial 1 Trial 2 Trial 3 Equivalence point (mL) 27.l16 mL Mass of filter paper precipitate ()311 I1133 20139 03228 Mass of filter paper (9) Mass of precipitate (g) Molarity of HaSO (M) DATA ANALYSIS (If you need more space, provide your answers on the back page) 1. Use the titration results to calculate the moles of H2SO4 that were...
1. What is the definition of an 'equivalence point' in an acid/base titration? (1 point) 2....
1. What is the definition of an 'equivalence point' in an acid/base titration? (1 point) 2. In part one of the experiment, you will prepare the acid solutions being titrated from a stock solution. Describe how you will accurately prepare 10.00 mL of 0.100 M HCl solution using a 1.00 M HCl stock solution. In your response to this question, be very specific about the quantities of stock solution and deionized water to be used in the dilution and the...
thank you In the lecture we used titration of sodium carbonate with hydrochloric acid as an example to explain how t...
thank you
In the lecture we used titration of sodium carbonate with hydrochloric acid as an example to explain how to titrate a weak base with a strong acid. Suppose that you are using HNO3 to titrate Na3PO4, describe how to calculate pH at following different titration stages: (a) before titration (b) at 19 equivalence point (c) at 3rd equivalence point (d) between 2nd and 3rd equivalence points (e) after 3rd equivalence point Calculation is not required, simply write the...
Of Oxalate Before beginning this experiment in the laboratory, you should be able to answer the f...
of Oxalate Before beginning this experiment in the laboratory, you should be able to answer the following questions 1. If0.4586 g of sodium oxalate, Na C204, requires 33.67 mL of a KMno4 solution to reach the end point, what is the molarity of the KMnO4 solution? Titration of an oxalate sample gave the following percentages: 15.53%, 15.55%, and 15.56%. Calculate the average and the standard deviation. 2. 3. Why does the solution decolorize upon standing after the equivalence point has...
Determination of Molar Mass by freezing Point depression Not sure how to answer these two questions...
Determination of Molar Mass by freezing Point depression
Not sure how to answer these two questions
Calcium chloride, CaCI_2 is commonly used as road salt. If one mole of CaCI_2 is dissolved in 1 kg v of water, would the freezing point of the solution be greater than, less than, or the same as a solution prepared by dissolving one mole of table sugar (sucrose, C_12H_22O_11) in 1 kg of water? Explain your answer. A student followed our lab procedure...
Reaction B: Sodium Carbonate and Hydrochloric Acid Experimental Data (a) Mass of evaporating dish + watch...
Reaction B: Sodium Carbonate and Hydrochloric Acid Experimental Data (a) Mass of evaporating dish + watch glass (b) Mass of evaporating dish + watch glass + sodium carbonate (c) Mass of sodium carbonate used (d) Mass of evaporating dish + watch glass + sodium chloride (e) Mass of sodium chloride collected (experimental yield) 125.99 126.3 g 0.499 126. 29 125-8 9 Data Analysis 1) Use your data to determine the experimental mole-to-mole ratio between sodium carbonate and sodium chloride. Show...
DATA AND CALCULATIONS Time at equivalence point (s) Time of color Trial *Equation for acid-base reaction...
DATA AND CALCULATIONS Time at equivalence point (s) Time of color Trial *Equation for acid-base reaction change (s) NaOH+HCI - 21 0s 1 250.5 NaOH+ HC2H3O2- 2 8l.55 99s 3 NH3+ HCl- 930s 4 NH3 + HC2H3O2- 90.55 81.Os Complete the reactions above. Attach copies of all four graphs to this report. 1. 2. Examine the time data for each of the Trials 1- -4. In which trial(s) did the indicator change color at about the same time as the...
Name Section/CRN EXPERIMENT 9 POTENTIOMETRIC DETERMINATION OF AN EQUILIBRIUM CONSTANT PRE-LABORATORY QUESTIONS The following preparatory questions should be answered before coming to lab. They are intended to introduce you to several jdeas that are important to aspects of the experiment. You must turn in your work to your instructor before you will be allowed to begin the experiment. Potassium acid phthalate, KHP (KHC4H&O4), is a primary standard reagent used to determine exactly the concentration of a solution of base, such...
Before the equivalence
point:
After the equvalence point:
Now, calculate the concentration of apotransferrin present in
the original 1.00 mL solution. ________ M Apotransferrin
The protein apotransferrin binds two Fe(lll) ions for cell transport. Consider when a 1.00 mL solution of apotransferrin is titrated with 102 muL. of a 1.72 M Fe(lll) solution. The initially colorless solution turns red, and the color change can be measured with a spectrophotometer. First, explain why there is a difference in spectrophotometric response during...
Please show all work !
Experiment 9 Conductometric Titration and Gravimetric Determination of a Precipitate REPORT SHEET Name: DATA TABLE Trial 1 Trial 2 Trial 3 Equivalence point (mL) 27.l16 mL Mass of filter paper precipitate ()311 I1133 20139 03228 Mass of filter paper (9) Mass of precipitate (g) Molarity of HaSO (M) DATA ANALYSIS (If you need more space, provide your answers on the back page) 1. Use the titration results to calculate the moles of H2SO4 that were...
1. What is the definition of an 'equivalence point' in an acid/base titration? (1 point) 2. In part one of the experiment, you will prepare the acid solutions being titrated from a stock solution. Describe how you will accurately prepare 10.00 mL of 0.100 M HCl solution using a 1.00 M HCl stock solution. In your response to this question, be very specific about the quantities of stock solution and deionized water to be used in the dilution and the...
thank you
In the lecture we used titration of sodium carbonate with hydrochloric acid as an example to explain how to titrate a weak base with a strong acid. Suppose that you are using HNO3 to titrate Na3PO4, describe how to calculate pH at following different titration stages: (a) before titration (b) at 19 equivalence point (c) at 3rd equivalence point (d) between 2nd and 3rd equivalence points (e) after 3rd equivalence point Calculation is not required, simply write the...
of Oxalate Before beginning this experiment in the laboratory, you should be able to answer the following questions 1. If0.4586 g of sodium oxalate, Na C204, requires 33.67 mL of a KMno4 solution to reach the end point, what is the molarity of the KMnO4 solution? Titration of an oxalate sample gave the following percentages: 15.53%, 15.55%, and 15.56%. Calculate the average and the standard deviation. 2. 3. Why does the solution decolorize upon standing after the equivalence point has...
Determination of Molar Mass by freezing Point depression
Not sure how to answer these two questions
Calcium chloride, CaCI_2 is commonly used as road salt. If one mole of CaCI_2 is dissolved in 1 kg v of water, would the freezing point of the solution be greater than, less than, or the same as a solution prepared by dissolving one mole of table sugar (sucrose, C_12H_22O_11) in 1 kg of water? Explain your answer. A student followed our lab procedure...
Reaction B: Sodium Carbonate and Hydrochloric Acid Experimental Data (a) Mass of evaporating dish + watch glass (b) Mass of evaporating dish + watch glass + sodium carbonate (c) Mass of sodium carbonate used (d) Mass of evaporating dish + watch glass + sodium chloride (e) Mass of sodium chloride collected (experimental yield) 125.99 126.3 g 0.499 126. 29 125-8 9 Data Analysis 1) Use your data to determine the experimental mole-to-mole ratio between sodium carbonate and sodium chloride. Show...
DATA AND CALCULATIONS Time at equivalence point (s) Time of color Trial *Equation for acid-base reaction change (s) NaOH+HCI - 21 0s 1 250.5 NaOH+ HC2H3O2- 2 8l.55 99s 3 NH3+ HCl- 930s 4 NH3 + HC2H3O2- 90.55 81.Os Complete the reactions above. Attach copies of all four graphs to this report. 1. 2. Examine the time data for each of the Trials 1- -4. In which trial(s) did the indicator change color at about the same time as the...
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