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Answer by true or false - if
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( 7-) The mixture of...
True or false? Explain your answer in detail for full credit. The mixture of equi 0.2M...
True or false? Explain your answer in detail for full credit. The mixture of equi 0.2M solution of sodium acetate and acetic acid has lower buffer capacity than the mixture of equi 0.5M NaCl and HCl.
Question II- Answer by False or True , if a statement is False , please correct...
Question II- Answer by False or True , if a statement is False , please correct it. 1- H2PO4 is a conjugate base of HPO42 and also amphoteric. 2- Benzoic acid( Ka = 6.5 x105) can be used to prepare efficient buffer of pH =6. 3- If excess NaOH dissolves Al(OH)only in a Mixture of Fe(OH)3/ Al(OH)3 this means that Fe(OH)3 is amphoteric substance. 4- Addition of NH4 CI(CI,NH4+) to a solution of NH4OH (NH4+, OH) will enhances its ionization....
Q(27) The pH of a 0.050 M aqueous solution of ammonium chloride falls within what range? A) 0-2 B) 2-7 C)7-9 D) 9-1...
Q(27) The pH of a 0.050 M aqueous solution of ammonium chloride falls within what range? A) 0-2 B) 2-7 C)7-9 D) 9-12 E) 12-14 Q(28) Based on the information in the table below: which acid in aqueous solution is the weakest? Name Formula Ka Acetic Acid CH3COOH 1.8X10-5 Benzoic Acid C6H5COOH 6.3 X10-5 Formic Acid HCOOH 1.7 X 104 Hydrofluoric Acid HF 7.1 X 104 A) CH3COOH B) C6H5COOH C) HCOOH D) HF Q(29) K = 2.39 for the...
D) An electron pair acceptor. E) An anphoteric species Q/33) A Lewis acid is? A)A proton...
D) An electron pair acceptor. E) An anphoteric species Q/33) A Lewis acid is? A)A proton donor B)A proton acceptor. C) An electron pair donor D) An electron pair acceptor E) An anphoteric species. Q(34) A Brønsted-Lowry acid is? A) A proton donor D) An electron pair acceptor. B)A proton acceptor. C) An electron pair donor E) An anphoteric species. Q(35) What is the relationship between Ka and Ko for a conjugate acid base pair? A) Kw=Ka+Kb B) Kw=Ka*Kb C)...
Q(33) A Lewis acid is? A) A proton donor. B) A proton acceptor. C) An electron...
Q(33) A Lewis acid is? A) A proton donor. B) A proton acceptor. C) An electron pair donor. D) An electron pair acceptor. E) An anphoteric species. Q(34) A Brønsted-Lowry acid is? A) A proton donor. B) A proton acceptor. C) An electron pair donor. D) An electron pair acceptor. E) An anphoteric species. Q(35) What is the relationship between Ka and Kb for a conjugate acid base pair? A) Kw=Ka+Kb B) Kw=K.*Kb C) Kw=Ko-Kb. D) Kw=Ka/Kb. E) Kw=K? Q(36)...
1. Which of the following make a buffer solution? (circle all the correct answers) a. 0.1...
1. Which of the following make a buffer solution? (circle all the correct answers) a. 0.1 M HCl and 0.1 M NaCl b. 0.1 M HF and 0.075 M KF C. 0.15 M Pentanoic acid and 0.15 M sodium pentanoate d. 0.1 M NaOH and 0.1 M HCI e. 0.1 M acetic acid and 0.00001 sodium acetate 2. Which of the following could make buffer systems when mixed together? (circle the correct answers) a. 0.10 M acetic acid and 0.05...
f. The units for buffer capacity are a mol " L x pH unit (True False)...
f. The units for buffer capacity are a mol " L x pH unit (True False) Falas g. The theoretical pH of a buffer containing 3.75 mmol of acetic acid and 1.25 mmol of sodium acetate is equal to the pKa of acetic acid. (True False) h. In the reaction, H2O2 (aq) +21+ (aq) + 2H30* (aq) → 4H2O(l) +12(aq), oxygen is reduced and iodide is oxidized. (True False) i. Cu2+ is the strongest oxidant out of the following three...
(A) (B) (C) (D) (E) It cannot be determined from the information given Q(27) The pH...
(A) (B) (C) (D) (E) It cannot be determined from the information given Q(27) The pH of a 0.050 M aqueous solution of ammonium chloride falls within what range? A) 0-2 B) 2-7 C)7-9 D) 9-12 E) 12-14 Q(28) Based on the information in the table below: which acid in aqueous solution is the weakest? Name Formula K Acetic Acid CH3COOH 1.8X10-5 Benzoic Acid C.HSCOOH 6.3 X10-5 Formic Acid HCOOH 1.7 X 104 Hydrofluoric Acid HF 7.1 X 104 B)...
Answer all 3M. The Which statement is correct for this reaction (A) CH,acts as a base....
Answer all
3M. The Which statement is correct for this reaction (A) CH,acts as a base. (C) NH, acts as a base 25. In which set are both compounds soluble in water? 29. (A) magnesium chioride (MgCl) and octane (C.H (B) ethanol (CH,CHJOH) and propane (CH,CH/CH 10s ) carbon tetrachloride (CCL) chloride (MgCl)and magnesium chlorideB) CH, is the conjugate acid of CH. D) magnesium chloride (MgCl) and ethano! (D) NH, is the conjugase acid of NH, (CH,CH OH) 30, which...
1. 200 mL of an aqueous solution contains 0.030 M concentrations of both Pb2+ and Ag+....
1. 200 mL of an aqueous solution contains 0.030 M
concentrations of both Pb2+ and Ag+. If 100
mL of 6.0 x 10-2 M NaCl is added to this solution will a
precipitate form? If so, what will the
precipitate be? The Ksp values for PbCl2 and AgCl are 1.7 x
10-5 and 1.8 x 10-10] 2. Which of the following is the expression
for the solubility product of Ba3(AsO4)2? 3. The pKa of a weak acid
is 6.50. What...
Question II- Answer by False or True , if a statement is False , please correct it. 1- H2PO4 is a conjugate base of HPO42 and also amphoteric. 2- Benzoic acid( Ka = 6.5 x105) can be used to prepare efficient buffer of pH =6. 3- If excess NaOH dissolves Al(OH)only in a Mixture of Fe(OH)3/ Al(OH)3 this means that Fe(OH)3 is amphoteric substance. 4- Addition of NH4 CI(CI,NH4+) to a solution of NH4OH (NH4+, OH) will enhances its ionization....
Q(27) The pH of a 0.050 M aqueous solution of ammonium chloride falls within what range? A) 0-2 B) 2-7 C)7-9 D) 9-12 E) 12-14 Q(28) Based on the information in the table below: which acid in aqueous solution is the weakest? Name Formula Ka Acetic Acid CH3COOH 1.8X10-5 Benzoic Acid C6H5COOH 6.3 X10-5 Formic Acid HCOOH 1.7 X 104 Hydrofluoric Acid HF 7.1 X 104 A) CH3COOH B) C6H5COOH C) HCOOH D) HF Q(29) K = 2.39 for the...
D) An electron pair acceptor. E) An anphoteric species Q/33) A Lewis acid is? A)A proton donor B)A proton acceptor. C) An electron pair donor D) An electron pair acceptor E) An anphoteric species. Q(34) A Brønsted-Lowry acid is? A) A proton donor D) An electron pair acceptor. B)A proton acceptor. C) An electron pair donor E) An anphoteric species. Q(35) What is the relationship between Ka and Ko for a conjugate acid base pair? A) Kw=Ka+Kb B) Kw=Ka*Kb C)...
Q(33) A Lewis acid is? A) A proton donor. B) A proton acceptor. C) An electron pair donor. D) An electron pair acceptor. E) An anphoteric species. Q(34) A Brønsted-Lowry acid is? A) A proton donor. B) A proton acceptor. C) An electron pair donor. D) An electron pair acceptor. E) An anphoteric species. Q(35) What is the relationship between Ka and Kb for a conjugate acid base pair? A) Kw=Ka+Kb B) Kw=K.*Kb C) Kw=Ko-Kb. D) Kw=Ka/Kb. E) Kw=K? Q(36)...
1. Which of the following make a buffer solution? (circle all the correct answers) a. 0.1 M HCl and 0.1 M NaCl b. 0.1 M HF and 0.075 M KF C. 0.15 M Pentanoic acid and 0.15 M sodium pentanoate d. 0.1 M NaOH and 0.1 M HCI e. 0.1 M acetic acid and 0.00001 sodium acetate 2. Which of the following could make buffer systems when mixed together? (circle the correct answers) a. 0.10 M acetic acid and 0.05...
f. The units for buffer capacity are a mol " L x pH unit (True False) Falas g. The theoretical pH of a buffer containing 3.75 mmol of acetic acid and 1.25 mmol of sodium acetate is equal to the pKa of acetic acid. (True False) h. In the reaction, H2O2 (aq) +21+ (aq) + 2H30* (aq) → 4H2O(l) +12(aq), oxygen is reduced and iodide is oxidized. (True False) i. Cu2+ is the strongest oxidant out of the following three...
(A) (B) (C) (D) (E) It cannot be determined from the information given Q(27) The pH of a 0.050 M aqueous solution of ammonium chloride falls within what range? A) 0-2 B) 2-7 C)7-9 D) 9-12 E) 12-14 Q(28) Based on the information in the table below: which acid in aqueous solution is the weakest? Name Formula K Acetic Acid CH3COOH 1.8X10-5 Benzoic Acid C.HSCOOH 6.3 X10-5 Formic Acid HCOOH 1.7 X 104 Hydrofluoric Acid HF 7.1 X 104 B)...
Answer all
3M. The Which statement is correct for this reaction (A) CH,acts as a base. (C) NH, acts as a base 25. In which set are both compounds soluble in water? 29. (A) magnesium chioride (MgCl) and octane (C.H (B) ethanol (CH,CHJOH) and propane (CH,CH/CH 10s ) carbon tetrachloride (CCL) chloride (MgCl)and magnesium chlorideB) CH, is the conjugate acid of CH. D) magnesium chloride (MgCl) and ethano! (D) NH, is the conjugase acid of NH, (CH,CH OH) 30, which...
1. 200 mL of an aqueous solution contains 0.030 M
concentrations of both Pb2+ and Ag+. If 100
mL of 6.0 x 10-2 M NaCl is added to this solution will a
precipitate form? If so, what will the
precipitate be? The Ksp values for PbCl2 and AgCl are 1.7 x
10-5 and 1.8 x 10-10] 2. Which of the following is the expression
for the solubility product of Ba3(AsO4)2? 3. The pKa of a weak acid
is 6.50. What...
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