Homework Answers
3.
--> KBr is highly soluble in water. Because, It is ionic compound and ionizes to corresponding anion and cation. These ions gets hydrated in water and make KBr soluble in Water.
KBr -----------------> K+ (aq) + Br- (aq)
--> Since m-nitrobenzoic acid is a organic acid, m-nitrobenzoic acid is sparingly soluble in water. The solubility of m-nitrobenzoic acid in water is 0.24g/100 mL only. The polarity of m-nitrobenzoic acid less compare to KBr.
--> Since benzophenone is nonpolar in nature it will not dissolve in water like KBr and Benzoic acid. It is insoluble in water, but, soluble in nonpolar solvents like hexane, benzene etc.
4.
In KBr, Br- is very weak conjugate base of HBr which is very strong acid. Because of this, when KBr is dissolved in water the Br- wil not react with water and do not disturb the ionic product of the water. So, it is not possible to find pKa value for KBr.
--->
The pKa value for m-nitrobenzoic acid is 3.47 in water.
Since the dissociation constant is 3.48 x 10-4.
--->
Since benzophenone is insoluble in water determination of pKa for benzophenone is not possible.
5.
In general organic acids are weak. so, produce strong conjugate bases. If pH of solution decreases, the solubility will decreases. This is due to, reaction of strong conjugate base with protons and forms undissociated acid which is insoluble.
If the pH increases, the deprotonation of organic acid increases, the OH- ions rapidly reacts with protons released from acid and drives solubility of organic acid by shifting dissociation in forward direction.
6.
Due to strong polar polar and nonpolar-nonpolar interactions, the polar molecule get dissolved in polar solvents and non polar molecules get dissolved in nonpolar solvents.
Add Answer to:
KBr m-nitrobenzoic benzophenone 3. Look up and record the solubility in water for each of your three compounds 4. De...
Group 3 Bag C: KBr, m-nitrobenzoic acid, Benzophenone Project 6: Properties of Matter and Separations Week...
Group 3 Bag C: KBr, m-nitrobenzoic acid, Benzophenone
Project 6: Properties of Matter and Separations Week 1: Prelab Organizational Questions 1. What is your group's unknown number and which compounds are in your group's unknown? 2. Draw the structures of your group's compounds. Be sure to include valence electrons. 3. Look up and record the solubility in water for each of your three compounds. 4. Define pka and list the pka of each of your solids. 5. How does pH...
Group 3 Bag C: KBr, m-nitrobenzoic acid, Benzophenone Week 2: Prelab Organizational Questions 8. How can...
Group 3 Bag C: KBr, m-nitrobenzoic acid, Benzophenone
Week 2: Prelab Organizational Questions 8. How can the solubility of compounds in your mixture help you to separate them? 9. How can a flow chart help in the separation of compounds in a mixture? 10. Create a flow chart to separate all of the components of your unknown.
1. Solubility in WATER Check solubility of four solutes in water (H2O). For each solute record...
1. Solubility in WATER Check solubility of four solutes in water (H2O). For each solute record how many teaspoons dissolved in 1/2 cup of water. NaCl: Start out with 4 small glasses (cups) and add 1/2 cup of water to each. Put 1/2 level teaspoon (tsp) of salt (NaCl) into the first cup and stir. If it dissolves within 1 minute; add another 1/2 tsp of salt and stir. Count the number of 1/2 tsps you are adding. Repeat until...
Provide a flow chart detailing the acid/base extraction/separation of the compounds show below. Your answer must...
Provide a flow chart detailing the acid/base extraction/separation of the compounds show below. Your answer must employ the following reagents: methylene chloride, hydrochloric acid (1M & 6M), sodium hydroxide (1M & 6M), 10% sodium bicarbonate (aq). Clearly indicate the product(s) and layers formed following each step of your separation scheme. IMPORTANT: p-cresol is soluble in sodium hydroxide solution but insoluble in neutral water or sodium bicarbonate solution. 2-ethylbenzoic acid is soluble in both sodium hydroxide and sodium bicarbonate solutions. Use...
1. Write the equilibrium expression for the autoionization of water. Using this expression define the terms...
1. Write the equilibrium expression for the autoionization of water. Using this expression define the terms acid and base and pH. 2. Calculate the pH, pOH, Ka, Kb, pKa, and pKb for a 0.082M solution of triethylamine. 3. Calculate the pH, pOH, Ka, Kb, pKa, and pKb for a 1.570 M solution of hydrogen cyanide. 4. The acid-dissociation constant for hypochlorus acid is 3.0 X 10-8. Calculate the concentrations of H3O+, CIO-, and HCIO at equilibrium if the initial concentration...
4.30. Using solubility rules, predict the solubility in water of the following ionic compounds. a. AI(OH) b. CaN...
4.30. Using solubility rules, predict the solubility in water of the following ionic compounds. a. AI(OH) b. CaN C. NH4CI d. KOH 4.32. Using solubility rules, decide whether the following ionic solids are soluble or insoluble in water. If they are soluble, write the chemical equation for dissolving in water and indicate what ions you would expect to be present in solution. (NE SO b. BaCO c. Pb(NOs)2 d. Ca(OH) 4.34. Write net ionic equations for the following molecular equations....
Exercise 2 Separation of a Mixture Based on Acid-Base Properties One purpose of this exercise is...
Exercise 2 Separation of a Mixture Based on Acid-Base Properties One purpose of this exercise is to learn how to use a separatory funnel to extract a single component away from other compounds in solution. To do so, we will apply the principles of solubility and acid-base behavior you’re seeing in class. One of the compounds is neutral in the acid-base sense. It has no ability to either donate or accept a proton from an aqueous solution, and will remain...
please answer number 5 5. The AgNO3 test solution was not used to test the water...
please
answer number 5
5. The AgNO3 test solution was not used to test the water insoluble but acid soluble unknowns, only the NaOH and Na2CO3 were used. Propose a reason why the AgNO3 was not used in part 3 of the experiment. Discussion/Conclusion (continue on the back of this page if needed) UTA-705 out each test tube at the sink with soap and water using a tes water and then analytical grade water (twice) and reuse the tu water...
1.How does adding NaOH to deionized water affect the pH differently than adding it to a...
1.How does adding NaOH to deionized water affect the pH differently
than adding it to a buffer?
2. how would you find the Ka of solution 4, after it is
diluted from solution 3? the measured pH was 4.98 which gave a [H+]
concentration of 1.05x10^-5.
Part A - Determining the Acid Ionization Constant for Acetic Acid Solution 1 6. Take a 30.0 mL sample of 10 M HOAc and place it in a beaker. Using a pH meter, measure...
Acid/Base Extraction 1. Provide a flow chart detailing the acid/base extraction/separation of the compounds shown below....
Acid/Base Extraction
1. Provide a flow chart detailing the acid/base
extraction/separation of the compounds shown below. Your answer
must employ the following reagents: methylene chloride,
hydrochloric acid (1M & 6M), sodium hydroxide (1M & 6M),
10% sodium bicarbonate (aq). Clearly indicate the product(s) and
layers formed following each step of your separation scheme.
IMPORTANT: p-cresol is soluble in sodium hydroxide solution but
insoluble in neutral water or sodium bicarbonate solution. 2-
ethylbenzoic acid is soluble in both sodium hydroxide and...
Group 3 Bag C: KBr, m-nitrobenzoic acid, Benzophenone
Project 6: Properties of Matter and Separations Week 1: Prelab Organizational Questions 1. What is your group's unknown number and which compounds are in your group's unknown? 2. Draw the structures of your group's compounds. Be sure to include valence electrons. 3. Look up and record the solubility in water for each of your three compounds. 4. Define pka and list the pka of each of your solids. 5. How does pH...
Group 3 Bag C: KBr, m-nitrobenzoic acid, Benzophenone
Week 2: Prelab Organizational Questions 8. How can the solubility of compounds in your mixture help you to separate them? 9. How can a flow chart help in the separation of compounds in a mixture? 10. Create a flow chart to separate all of the components of your unknown.
Provide a flow chart detailing the acid/base extraction/separation of the compounds show below. Your answer must employ the following reagents: methylene chloride, hydrochloric acid (1M & 6M), sodium hydroxide (1M & 6M), 10% sodium bicarbonate (aq). Clearly indicate the product(s) and layers formed following each step of your separation scheme. IMPORTANT: p-cresol is soluble in sodium hydroxide solution but insoluble in neutral water or sodium bicarbonate solution. 2-ethylbenzoic acid is soluble in both sodium hydroxide and sodium bicarbonate solutions. Use...
1. Write the equilibrium expression for the autoionization of water. Using this expression define the terms acid and base and pH. 2. Calculate the pH, pOH, Ka, Kb, pKa, and pKb for a 0.082M solution of triethylamine. 3. Calculate the pH, pOH, Ka, Kb, pKa, and pKb for a 1.570 M solution of hydrogen cyanide. 4. The acid-dissociation constant for hypochlorus acid is 3.0 X 10-8. Calculate the concentrations of H3O+, CIO-, and HCIO at equilibrium if the initial concentration...
4.30. Using solubility rules, predict the solubility in water of the following ionic compounds. a. AI(OH) b. CaN C. NH4CI d. KOH 4.32. Using solubility rules, decide whether the following ionic solids are soluble or insoluble in water. If they are soluble, write the chemical equation for dissolving in water and indicate what ions you would expect to be present in solution. (NE SO b. BaCO c. Pb(NOs)2 d. Ca(OH) 4.34. Write net ionic equations for the following molecular equations....
please
answer number 5
5. The AgNO3 test solution was not used to test the water insoluble but acid soluble unknowns, only the NaOH and Na2CO3 were used. Propose a reason why the AgNO3 was not used in part 3 of the experiment. Discussion/Conclusion (continue on the back of this page if needed) UTA-705 out each test tube at the sink with soap and water using a tes water and then analytical grade water (twice) and reuse the tu water...
1.How does adding NaOH to deionized water affect the pH differently
than adding it to a buffer?
2. how would you find the Ka of solution 4, after it is
diluted from solution 3? the measured pH was 4.98 which gave a [H+]
concentration of 1.05x10^-5.
Part A - Determining the Acid Ionization Constant for Acetic Acid Solution 1 6. Take a 30.0 mL sample of 10 M HOAc and place it in a beaker. Using a pH meter, measure...
Acid/Base Extraction
1. Provide a flow chart detailing the acid/base
extraction/separation of the compounds shown below. Your answer
must employ the following reagents: methylene chloride,
hydrochloric acid (1M & 6M), sodium hydroxide (1M & 6M),
10% sodium bicarbonate (aq). Clearly indicate the product(s) and
layers formed following each step of your separation scheme.
IMPORTANT: p-cresol is soluble in sodium hydroxide solution but
insoluble in neutral water or sodium bicarbonate solution. 2-
ethylbenzoic acid is soluble in both sodium hydroxide and...
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