Indicators are usually organic molecules with functional groups that will accept or donate protons to the...
Indicators are usually organic molecules with functional groups that will accept or donate protons to the solution which will change the structure and make the solution change color. How does the precision of a pH measurement done with an indicator compare to that of pH paper or a pH probe?
Homework Answers
pH paper/probe defines as low as pH ~ 1 range of area with some color on the paper, thus we can only say that it's a pH = 8 solution but we can not precisely say that is it really pH = 8.5 or 8.6? That's the problem with paper/probe. Whereas the organic molecules, they are just the accurate ones, only at particular pH values their color will change suddenly and you can precisely tell the pH of the solution precisely.
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Indicators are usually organic molecules with functional groups
that will accept or donate protons to the...
Given the following relationships, how would the reaction shift to establish or maintain equilibrium? a. Q>K...
Given the following relationships, how would the reaction shift to establish or maintain equilibrium? a. Q>K b. Q<K c. Q=K How would the equilibrium shift given the following stresses on the following reaction? A (l) + B (g) ↔ 2C (g) + D (l) ΔH = 145 kJ Removal of compound D Increase in temperature Decrease in pressure Indicators are usually organic molecules with functional groups that will accept or donate protons to the solution which will change the structure...
Use the Table 7.1, estimate the pH of following solutions. The colors of the 4 indicators...
Use the Table 7.1, estimate the pH of following solutions. The colors of the 4 indicators in the solution are given. Explain your answer a. Solution A 2. 3. Make studie acid s you g your pre-l thymol blue: yellow methyl orange: yellow methyl red: orange bromothymol blue: yellow Range of pH b. Solution B thymol blue: yellow methyl orange: yellow methyl red: yellow bromothymol blue: blue Range of pH Row C: methyl red Row D: bromthymol blue 4. Swirl...
"We now continue the introduction of organic chemistry roadmaps. Because of the many new functional groups...
"We now continue the introduction of organic chemistry roadmaps. Because of the many new functional groups that will be introduced in coming chapters, we recommend that you make a new roadmap to accommodate the reactions in Chapters 15–18.To make your own roadmap for Chapters 15–18, take a blank sheet of paper and write the following functional groups in the orientations shown. Fill the entire sheet of paper and leave plenty of room between functional groups. Most students find it helpful...
Chapter 3: The Chemical Basis of Life II: Organic Molecules 3.1 The Carbon Atom and the...
Chapter 3: The Chemical Basis of Life II: Organic Molecules 3.1 The Carbon Atom and the Study of Organic Molecules Explain the properties of carbon that make it the chemical basis of all life. Describe the variety and chemical characteristics of common functional groups of organic compounds. Compare and contrast the different types of isomeric compounds. 3.2 Formation of Organic Molecules and Macromolecules Diagram how small molecules may be assembled into larger ones by dehydration reactions and how hydrolysis reactions...
2. Calculate the concentration of one liter of the resulting calcium chloride solution (assuming you started...
2. Calculate the concentration of one liter of the resulting
calcium chloride solution (assuming you started with 102.7 mg of
calcium carbonate) in units of molar and millimolar. Also calculate
the concentration in “parts-per-million as CaCO3”. (Refer to
section 13.5 of your textbook, if needed.)
a. If a standard Ca2+ solution is 100 ppm and 50 mL of solution
is used for the standardization, calculate the approximate volume
of 2.5 mM EDTA4- solution needed to reach the end point of...
5. 3. In Part 1 of the experiment (preparation of Ca²+ (aq) solution of known concentration),...
5. 3. In Part 1 of the experiment (preparation of Ca²+ (aq) solution of known concentration), the volumes of water used in steps 1, 2, 3, and 5 are all approximate. Why doesn't it matter that these volumes are approximate rather than accurately measured? (Be specific.) 4. If a standard Ca? solution is 100 ppm and 50 mL of solution is used for the standardization, calculate the approximate volume of 2.5 mM EDTA+ solution needed to reach the end point...
Part 4 - Introduction to Organic Synthesis Line Angle Formula Line Angle Formula Functional Groups Present...
Part 4 - Introduction to Organic Synthesis Line Angle Formula Line Angle Formula Functional Groups Present Reactant 1 Reactant 2 Product 1 Product 2 Part 4 - Introduction to Organic Synthesis Part 4 Make the following two molecules: (CH),CHCO H and CH,CHOHCH2OH. Upon completing these models, remove the-O-H group from the carboxylic acid group and the H-atom from one of the two-O-H groups of the alcohol: connect the resulting two large molecular fragments. Draw the Line-Angle Structure that results from...
Qualitative Analysis of Organic Compounds: Pre lab questions (5 pts) 1. (1 point) Identify the functional...
Qualitative Analysis of Organic Compounds: Pre lab questions (5 pts) 1. (1 point) Identify the functional groups based on color / odor a. Dark yellow to red color indicates that the functional group could possibly be------------- b. Fruity / Floral odor indicates that the functional group could possibly be------------- c. Fishy odor indicates that the functional group could possibly be------------- d. Sharp, biting odor indicates that the functional group could possibly be------------- 2. (0.5 pts) If a liquid is soluble...
CHM130LL Lab 12 - Exploring Indicators Name: MEID Complete the following items by typing into the...
CHM130LL Lab 12 - Exploring Indicators Name: MEID Complete the following items by typing into the text box provided. The boxes will increase in size if additional space is necessary. Please be sure to save all your work as an MS Word document to submit properly. Part I - Calibration of Red Cabbage Juice Indicator A. Data Table 1: Calibration of Red Cabbage Juice Indicator with a Base Fill in the data table. Since your goal is to add sufficient...
Number#1,2,3and 4 (8 points) Table 1: pH of Household Substances using Litmus Paper and Natural Indicators...
Number#1,2,3and 4
(8 points) Table 1: pH of Household Substances using Litmus Paper and Natural Indicators PH Determined Using pH paper Color Change using Cabbage Juice Indicator Substance Baking Soda light bu s Vinegar 1light pin Carbonated Water 4 Bleach s Lemon Juice super grt e Pink oreer ghrt pink 2 Window Cleaner 7 Aspirin 4t 2 8 Dish Soap (n wvite blue Toothpaste Antacid Tablets Drain Cleaner Household Ammonia Unknown Solution # light blue 2. beige light 9mi 1乙...
Use the Table 7.1, estimate the pH of following solutions. The colors of the 4 indicators in the solution are given. Explain your answer a. Solution A 2. 3. Make studie acid s you g your pre-l thymol blue: yellow methyl orange: yellow methyl red: orange bromothymol blue: yellow Range of pH b. Solution B thymol blue: yellow methyl orange: yellow methyl red: yellow bromothymol blue: blue Range of pH Row C: methyl red Row D: bromthymol blue 4. Swirl...
2. Calculate the concentration of one liter of the resulting
calcium chloride solution (assuming you started with 102.7 mg of
calcium carbonate) in units of molar and millimolar. Also calculate
the concentration in “parts-per-million as CaCO3”. (Refer to
section 13.5 of your textbook, if needed.)
a. If a standard Ca2+ solution is 100 ppm and 50 mL of solution
is used for the standardization, calculate the approximate volume
of 2.5 mM EDTA4- solution needed to reach the end point of...
5. 3. In Part 1 of the experiment (preparation of Ca²+ (aq) solution of known concentration), the volumes of water used in steps 1, 2, 3, and 5 are all approximate. Why doesn't it matter that these volumes are approximate rather than accurately measured? (Be specific.) 4. If a standard Ca? solution is 100 ppm and 50 mL of solution is used for the standardization, calculate the approximate volume of 2.5 mM EDTA+ solution needed to reach the end point...
Part 4 - Introduction to Organic Synthesis Line Angle Formula Line Angle Formula Functional Groups Present Reactant 1 Reactant 2 Product 1 Product 2 Part 4 - Introduction to Organic Synthesis Part 4 Make the following two molecules: (CH),CHCO H and CH,CHOHCH2OH. Upon completing these models, remove the-O-H group from the carboxylic acid group and the H-atom from one of the two-O-H groups of the alcohol: connect the resulting two large molecular fragments. Draw the Line-Angle Structure that results from...
CHM130LL Lab 12 - Exploring Indicators Name: MEID Complete the following items by typing into the text box provided. The boxes will increase in size if additional space is necessary. Please be sure to save all your work as an MS Word document to submit properly. Part I - Calibration of Red Cabbage Juice Indicator A. Data Table 1: Calibration of Red Cabbage Juice Indicator with a Base Fill in the data table. Since your goal is to add sufficient...
Number#1,2,3and 4
(8 points) Table 1: pH of Household Substances using Litmus Paper and Natural Indicators PH Determined Using pH paper Color Change using Cabbage Juice Indicator Substance Baking Soda light bu s Vinegar 1light pin Carbonated Water 4 Bleach s Lemon Juice super grt e Pink oreer ghrt pink 2 Window Cleaner 7 Aspirin 4t 2 8 Dish Soap (n wvite blue Toothpaste Antacid Tablets Drain Cleaner Household Ammonia Unknown Solution # light blue 2. beige light 9mi 1乙...
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