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question 19
19. Propionic acid (CH,CH CoOH) is a weak acid with a Ka 1.34x 10...
10. (a) A chemist needed a buffered solution of propionic acid (CH,CH,COOH) and its salt (CH,CH,COON.)....
10. (a) A chemist needed a buffered solution of propionic acid (CH,CH,COOH) and its salt (CH,CH,COON.). Calculate the ratio (CH:CH;COONA] / [CH;CH;COOH] required to yield a pH of 4.A0 (Ka for propionic acid = 1.3x10) (b) A buffer solution is prepared by mixing 1.AB5 grams of acetic acid (CH3COOH) and 3.01C grams of sodium acetate (CH3COONA) and making the total volume to one litre. Calculate the pH of the buffer solution. (Ka = 1.8x10°) (RAM of H=1, C=12, O=16, Na=23)...
Concentration is not given. Acetic acid (CH, COOH, K, = 5.62 x 10-5) is a weak...
Concentration is not given.
Acetic acid (CH, COOH, K, = 5.62 x 10-5) is a weak acid, so the salt sodium acetate (CH, COONa) acts as a weak base. Calculate the pH of a 0.563 M solution of sodium acetate. pH =
How would we find the net ionic equation for this? For part 4, I mean. Obtain...
How would we find the net ionic equation for this?
For part 4, I mean.
Obtain about 15 ml. of 1.0 M acetic acid in a clean, dry, small plastic beaker. Measure 5.00 mL of the 1.0 M CH,COOH solution in a 10-mL graduated cylinder and transfer it to a 50-mL graduated cylinder. Add enough distilled water to have a total volume of 50.0 mL and mix it thoroughly. The result is a 0.10 M CH,COOH solution. Note and record...
Question B2. Answer ALL parts from (a) to (c). (a) A base is added to an...
Question B2. Answer ALL parts from (a) to (c). (a) A base is added to an acid: ) Sketch the pH curves for both a strong base added to a weak acid, and for a strong base added to a strong acid. Note the differences between these two curves and briefly account for why they would be different. (4 marks) (ii) The end point of a titration was reached when 16 cm of a 0.25 mol dm-1 solution of sodium...
2. The Ka of nitrous acid HNO2is 4.5 x 10-4. In a titration, 50.0 mL of 1.00 M...
2. The Ka of nitrous acid HNO2is 4.5 x 10-4. In a titration, 50.0 mL of 1.00 M HNO2is tit rated with 0.750 M NaOH. a. Calculate the pH of the solution: (i) Before the titration begins. (ii) When sufficient NaOH has been added to neutralize half the nitrous acid originally present. (iii) At the equivalence point. (iv)When 0.05 mL NaOH less than that required to reach the equivalence point has been added. (v) When 0.05 mL NaOH more than that required to reach the...
1. Which of the followi ch of the following reactions is not readily explained by the...
1. Which of the followi ch of the following reactions is not readily explained by the Arrhenius concept of acids and bases? a. A. HCl(aq) + NaOH(aq) - NaCl(aq) + H20() b. H30(aq) + OH-(aq) + 2H20(1) c. HCI(g) + NH3(g) - NH4Cl(s) d. HC2H302(aq) + H2O(l) H30*(aq) + C2H302-(ag) e. H30 (aq) + OH-(aq) + 2H2O(aq) 2. Classify each of the following species as Brønsted acid or base or both: a) H20, b) OH", c) H30, d) NH3, e)...
1. Which of the followi ch of the following reactions is not readily explained by the Arrhenius concept of acids a...
1. Which of the followi ch of the following reactions is not readily explained by the Arrhenius concept of acids and bases? a. A. HCl(aq) + NaOH(aq) - NaCl(aq) + H20() b. H30(aq) + OH-(aq) + 2H20(1) c. HCI(g) + NH3(g) - NH4Cl(s) d. HC2H302(aq) + H2O(l) H30*(aq) + C2H302-(ag) e. H30 (aq) + OH-(aq) + 2H2O(aq) 2. Classify each of the following species as Brønsted acid or base or both: a) H20, b) OH", c) H30, d) NH3, e)...
It's a weak acid strong base titration Experiment 4: Identification of an unknown acid by titration...
It's a weak acid strong base titration
Experiment 4: Identification of an unknown acid by titration Page 2 of 15 Background In this experiment, you will use both qualitative and quantitative properties to determine an unknown acid's identity and concentration. To do this analysis, you will perform a titration of your unknown acid sample-specifically a potentiometric titration where you use a pH meter and record pH values during the titration, combined with a visual titration using a color indi- cator...
What results when a secondary alcohol is oxidized? a. a ketone d. an acid b. an...
What results when a secondary alcohol is oxidized? a. a ketone d. an acid b. an amine e. no reaction c. an aldehyde Which of the following combinations will react spontaneously? A. 12 + Cu2+ B. Pb2+ + Ag C. Zn2+ + Mg D. Sn2+ + Ni2+ The general formula for a cycloalkane can be represented by which of the following? a. C,H, C. CH b. C.H2n+2 d. C.H21-2 In a certain reaction AH =-136 kJ and E, = 96...
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...
Concentration is not given.
Acetic acid (CH, COOH, K, = 5.62 x 10-5) is a weak acid, so the salt sodium acetate (CH, COONa) acts as a weak base. Calculate the pH of a 0.563 M solution of sodium acetate. pH =
How would we find the net ionic equation for this?
For part 4, I mean.
Obtain about 15 ml. of 1.0 M acetic acid in a clean, dry, small plastic beaker. Measure 5.00 mL of the 1.0 M CH,COOH solution in a 10-mL graduated cylinder and transfer it to a 50-mL graduated cylinder. Add enough distilled water to have a total volume of 50.0 mL and mix it thoroughly. The result is a 0.10 M CH,COOH solution. Note and record...
Question B2. Answer ALL parts from (a) to (c). (a) A base is added to an acid: ) Sketch the pH curves for both a strong base added to a weak acid, and for a strong base added to a strong acid. Note the differences between these two curves and briefly account for why they would be different. (4 marks) (ii) The end point of a titration was reached when 16 cm of a 0.25 mol dm-1 solution of sodium...
1. Which of the followi ch of the following reactions is not readily explained by the Arrhenius concept of acids and bases? a. A. HCl(aq) + NaOH(aq) - NaCl(aq) + H20() b. H30(aq) + OH-(aq) + 2H20(1) c. HCI(g) + NH3(g) - NH4Cl(s) d. HC2H302(aq) + H2O(l) H30*(aq) + C2H302-(ag) e. H30 (aq) + OH-(aq) + 2H2O(aq) 2. Classify each of the following species as Brønsted acid or base or both: a) H20, b) OH", c) H30, d) NH3, e)...
1. Which of the followi ch of the following reactions is not readily explained by the Arrhenius concept of acids and bases? a. A. HCl(aq) + NaOH(aq) - NaCl(aq) + H20() b. H30(aq) + OH-(aq) + 2H20(1) c. HCI(g) + NH3(g) - NH4Cl(s) d. HC2H302(aq) + H2O(l) H30*(aq) + C2H302-(ag) e. H30 (aq) + OH-(aq) + 2H2O(aq) 2. Classify each of the following species as Brønsted acid or base or both: a) H20, b) OH", c) H30, d) NH3, e)...
It's a weak acid strong base titration
Experiment 4: Identification of an unknown acid by titration Page 2 of 15 Background In this experiment, you will use both qualitative and quantitative properties to determine an unknown acid's identity and concentration. To do this analysis, you will perform a titration of your unknown acid sample-specifically a potentiometric titration where you use a pH meter and record pH values during the titration, combined with a visual titration using a color indi- cator...
What results when a secondary alcohol is oxidized? a. a ketone d. an acid b. an amine e. no reaction c. an aldehyde Which of the following combinations will react spontaneously? A. 12 + Cu2+ B. Pb2+ + Ag C. Zn2+ + Mg D. Sn2+ + Ni2+ The general formula for a cycloalkane can be represented by which of the following? a. C,H, C. CH b. C.H2n+2 d. C.H21-2 In a certain reaction AH =-136 kJ and E, = 96...
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...
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