Homework Answers
Answer:
- Indicator
- pipette
Explanation:
Materials for a Titration Procedure
- burette
- white tile (used to see a color change in the solution)
- pipette
- pH indicator (the type depends on the reactants)
- Erlenmeyer or conical flask
- titrant (a standard solution of known concentration; a common example is aqueous sodium carbonate)
- analyte, or titrand (the solution of unknown concentration)
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Remaining time: 12:05 Question 4 How many of the following materials are used in the acid...
Draw a pathway for the reaction of phenylboronic acid with 4-iodophenol to obtain 4-phenylphenol in the...
Draw a pathway for the
reaction of phenylboronic acid with 4-iodophenol to obtain
4-phenylphenol in the form of a catalytic
cycle. EXPLAIN and STATE all complexes formed in
EACH STEP by their electron counts (count how many
e- are there, e.g. 18 e- or 16
e- etc.), formal
oxidation states and all the reactions with
mechanistic labels (i.e. oxidative
addition, reductive elimination, etc.)
(note the amount of base used). Be sure to
EXPLAIN the catalytic cycle as to what happens...
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...
CHROMIC ACID OXIDATION Pre Lab Questions the amounts of materials that will be used from the...
CHROMIC ACID OXIDATION Pre Lab Questions the amounts of materials that will be used from the experimental section above) H2SO4 + Na2Cr207 2H20- H2O, A Molecular Weight Theoretical yield amount moles on (if applicable) Equivalents 2. Look up the melting point for p-nitrobenzoic acid and record the reference. 3. What color change is expected to be observed in the reaction? Explain why. CHROMIC ACID OXIDATION Experimental Procedure: Part I: Synthesis of p-nitrobenzoic Acid 1. Under the hood, add 0.400 g...
PROCEDURE CAUTION!!! Nitric acid and sulfuric acid are strong and corrosive acids. For that reason, avoid...
PROCEDURE CAUTION!!! Nitric acid and sulfuric acid are strong and corrosive acids. For that reason, avoid inhaling its vapors or causing any contact with the skin or clothing. Wear your protective glasses at all times. Use the extractors to work with these acids. A. Nitration of methyl benzoate 1. Preparation of the reactants. In the extractor you will find a burette with concentrated sulfuric acid, a second burette with concentrated nitric acid, clearly identified. Familiarize yourself with the scales of...
3. If 15.0 mL of 0.125 M phosphoric acid is titrated with 0.100 M NaOH, what...
3. If 15.0 mL of 0.125 M phosphoric acid is titrated with 0.100 M NaOH, what volume of the titrant (in mL) must be added to completely neutralize the acid? Show all of your work (including the chemical equation). (1 point) Post-lab Questions: Experiment #9: Acid-Base Titrations Student Learning Objectives : Students will gain practice with the accurate preparation of solutions. Students will perform acid-base titrations and prepare titration curves. Students will identify strong and weak acids by the shapes...
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...
Need help on providing reactions that describe the acid-base extraction and neutralization processes used in this exper...
Need help on providing reactions that describe the acid-base
extraction and neutralization processes used in this experiment.
Provide a statement of solubility of each starting material and
product.
The experiment to be performed this week involves liquid-liquid extraction using a separatory funnel. Read chapter 15 in Zubrick to familiarize yourself with the use of the glassware for extraction and washing. Acid/Base Extraction Liquid-liquid extraction is a technique that can be used to physically separate two substances that have varying solubility...
Acid/Base Extraction Liquid-liquid extraction is a technique that can be used to physically separate two substancesthat...
Acid/Base Extraction Liquid-liquid extraction is a technique that can be used to physically separate two substancesthat have varying solubility properties. Typically an aqueous solution can be extracted with anorganic solvent to isolate a compound or vice-versa. The specialized piece of glassware that isemployed for these types of separations is called a separatory funnel.In this experiment a mixture of benzoic acid and naphthalene will be purified using liquid-liquidextraction, more specifically an acid-base extraction. Since both compounds are soluble inethyl acetate (an...
EXPERIMENT: 26 ELECTROCHEMISTRY: GALVANIC AND ELECTROLYTIC CELLS Materials Required : 50 mL beake...
Help please
EXPERIMENT: 26 ELECTROCHEMISTRY: GALVANIC AND ELECTROLYTIC CELLS Materials Required : 50 mL beakers (2) test tubes sandpaper glass U-tube cotton voltmeter 9.0 V battery connecting wires with alligator clips (2) thermometer iron nail paper clips (2) copper wire magnesium ribbon magnesium sulfate (MgSO) copper sulfate pentahydrate (CuSO, 5H,O) sodium chloride (NaCI) saturated sodium chloride (NaCI)solution phenolphthalein indicator SAFETY PRECAUTIONS: EYE PROTECTION MUST BE WORN AT ALL TIMES IN LABORATORY. Purpose of Experiment: Oxidation-reduction reactions will be performed and...
Create graphs for Figures 1-4 (circled on pages 111 & 114) based on the data given in Tables ...
Create graphs for Figures 1-4 (circled on pages 111 & 114)
based on the data given in Tables 2 & 4.
Lab # 8 Cellular Respiration and Fermentation I. Goals and Objectives At the completion of this laboratory exercise, students will be able to: A Differentiate between the intermediates and products of fermentation versus acrobic cellular respiration in yeast. Relate rates of fermentation with sugar availability in yeast. Utilize a reduction-oxidation dye to determine the effect of varying yeast concentration...
Draw a pathway for the
reaction of phenylboronic acid with 4-iodophenol to obtain
4-phenylphenol in the form of a catalytic
cycle. EXPLAIN and STATE all complexes formed in
EACH STEP by their electron counts (count how many
e- are there, e.g. 18 e- or 16
e- etc.), formal
oxidation states and all the reactions with
mechanistic labels (i.e. oxidative
addition, reductive elimination, etc.)
(note the amount of base used). Be sure to
EXPLAIN the catalytic cycle as to what happens...
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...
CHROMIC ACID OXIDATION Pre Lab Questions the amounts of materials that will be used from the experimental section above) H2SO4 + Na2Cr207 2H20- H2O, A Molecular Weight Theoretical yield amount moles on (if applicable) Equivalents 2. Look up the melting point for p-nitrobenzoic acid and record the reference. 3. What color change is expected to be observed in the reaction? Explain why. CHROMIC ACID OXIDATION Experimental Procedure: Part I: Synthesis of p-nitrobenzoic Acid 1. Under the hood, add 0.400 g...
PROCEDURE CAUTION!!! Nitric acid and sulfuric acid are strong and corrosive acids. For that reason, avoid inhaling its vapors or causing any contact with the skin or clothing. Wear your protective glasses at all times. Use the extractors to work with these acids. A. Nitration of methyl benzoate 1. Preparation of the reactants. In the extractor you will find a burette with concentrated sulfuric acid, a second burette with concentrated nitric acid, clearly identified. Familiarize yourself with the scales of...
3. If 15.0 mL of 0.125 M phosphoric acid is titrated with 0.100 M NaOH, what volume of the titrant (in mL) must be added to completely neutralize the acid? Show all of your work (including the chemical equation). (1 point) Post-lab Questions: Experiment #9: Acid-Base Titrations Student Learning Objectives : Students will gain practice with the accurate preparation of solutions. Students will perform acid-base titrations and prepare titration curves. Students will identify strong and weak acids by the shapes...
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...
Need help on providing reactions that describe the acid-base
extraction and neutralization processes used in this experiment.
Provide a statement of solubility of each starting material and
product.
The experiment to be performed this week involves liquid-liquid extraction using a separatory funnel. Read chapter 15 in Zubrick to familiarize yourself with the use of the glassware for extraction and washing. Acid/Base Extraction Liquid-liquid extraction is a technique that can be used to physically separate two substances that have varying solubility...
Help please
EXPERIMENT: 26 ELECTROCHEMISTRY: GALVANIC AND ELECTROLYTIC CELLS Materials Required : 50 mL beakers (2) test tubes sandpaper glass U-tube cotton voltmeter 9.0 V battery connecting wires with alligator clips (2) thermometer iron nail paper clips (2) copper wire magnesium ribbon magnesium sulfate (MgSO) copper sulfate pentahydrate (CuSO, 5H,O) sodium chloride (NaCI) saturated sodium chloride (NaCI)solution phenolphthalein indicator SAFETY PRECAUTIONS: EYE PROTECTION MUST BE WORN AT ALL TIMES IN LABORATORY. Purpose of Experiment: Oxidation-reduction reactions will be performed and...
Create graphs for Figures 1-4 (circled on pages 111 & 114)
based on the data given in Tables 2 & 4.
Lab # 8 Cellular Respiration and Fermentation I. Goals and Objectives At the completion of this laboratory exercise, students will be able to: A Differentiate between the intermediates and products of fermentation versus acrobic cellular respiration in yeast. Relate rates of fermentation with sugar availability in yeast. Utilize a reduction-oxidation dye to determine the effect of varying yeast concentration...
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