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17. Essay (20 pts) How many grams of salicylic acid (Mr =...
Question 2 Salicylic acid, HC,H,0, is a chemical compound used in many facial cleansing products. Figure 2. Stru...
Question 2 Salicylic acid, HC,H,0, is a chemical compound used in many facial cleansing products. Figure 2. Structure of Salicylic Acid a) Identify the ionizable hydrogen (HA or Hg) with the correct pk НА lonizable Hydrogen pK, 2.97 HA 13.7 :91 3 19- 10 b) The solubility of salicylic acid in water is 0.210-96 HC,HsOs by mass. What is the pH of an aqueous solution of salicylic acid at saturation? (Assume the density of the solution is 1.00 g/mL). 2-U...
Please help, I'm so confused!!!! This is due wednesday night!!! i'm gonna fail :(((( pH of...
Please help, I'm so confused!!!! This is due wednesday night!!!
i'm gonna fail :((((
pH of Buffer Solutions Procedure: Acetic Acid-Sodium Acetate Buffer (pKa acetic acid = 4.75) Weigh about 3.5 g of Na2C2H302 3H2O, record the exact mass, and add to a 250 ml beaker. Measure exactly 8.8 mL of 3.0 M acetic acid (use 10 mL grad cylinder) and add to the beaker containing the sodium acetate. • Measure exactly 55.6 mL of distilled water and add to...
Citric Acid has 3 pKas: 3.13, 4.76, and 6.39. How many grams of sodium citrate monobasic...
Citric Acid has 3 pKas: 3.13, 4.76, and 6.39. How many grams of sodium citrate monobasic (HOC(COONa)(CH2COOH)2) and citric acid (HOC(COOH)(CH2COOH)2) are needed to make 300 mL of a 10 mM citrate buffer of exactly pH 2.8? The molecular weight of sodium citrate monobasic (NaH7C6O7) is 214.11 g/mol and that of citric acid (H8C6O7) is 192.12 g/mol.
How many grams of sodium acetate, CH3COONa, is required to mix with 2.00 Liters of 0.450...
How many grams of sodium acetate, CH3COONa, is required to mix with 2.00 Liters of 0.450 M acetic acid, CH3COOH, in order to prepare a buffer solution with a pH that equals 5.00? pKa(CH3COOH) = 4.74 and molar mass(CH3COONa) = 82.03 g/mol
#4.. please show work and dont skip steps. trying to learn how to do this for...
#4.. please show work and dont skip steps. trying to learn how
to do this for the actual biochemistry lab
PART B. PRACTICE CALCULATIONS Convert units (show your work!): a. 0.01 ml b. 0.05 M = MM c. 0.2 M = mM d. 10 mM - M 2. Molar mass of Na olar mass of NaOH is 40 /mol. How many grams of NaOH do you have to take to prepare a. 11 of 10 M solution of NaOH? b....
please help Mustrates treat all types of ilnesses. Background Aspirin is a prodrug of salicylic acid,...
please help
Mustrates treat all types of ilnesses. Background Aspirin is a prodrug of salicylic acid, the actual active drug. A compound related to salicylic acid, salicin, was first isolated from willow bark in the mid 1700's, but willow-bark extract was used by the andient Greeks as a treatment for pain and fever. Salicylic acid (and many related phenols) are very hard on your Ho stomach, but when esterified, as aspirin is, they are much better tolerated. Simple esters are...
4. Mr. Burnes bought a bottle of vinegar and wondered how concentrated the acetic acid (CH-COOH;...
4. Mr. Burnes bought a bottle of vinegar and wondered how concentrated the acetic acid (CH-COOH; mm = 60.05 g/mol) was inside. He titrated it with 0.00182 M NaOH that he found in a general chemistry laboratory. It took 9.90 mL of NaOH to reach the equivalence point. See titration curve on next page. A. What is the concentration of acetic acid if 23.7 mL of vinegar was used for the titration? B. Mr. Burnes bought the economy size bottle...
I am having trouble determining the calculations for table 3. Can you please show me how to do th...
i am having trouble determining the calculations for table 3.
Can you please show me how to do the calculations? thank you!
Mass Formula Weight Amount Needed Amount NeededWeighed Chemical Ingredient Formula(g/mol) CO3 03 349 13.2 4 oz. Baking Soda Epsom Salt 2 oz. blo Corn Starch 2 oz. slo v Citric Acid 2 oz. Dried Flower Petals Least amount possible Witch Hazel Soap Colorant 4-6 drops 4-6 drops Essential Oil 119 Coconut Oill 17 g Solution pH Bath Bomb...
PLEASE COMPLETE ALL ANSWER. SHOW ALL WORK. For questions 10 and 11. You need a buffer...
PLEASE COMPLETE ALL ANSWER. SHOW ALL WORK.
For questions 10 and 11. You need a buffer with a pH of 3.50 for a certain experiment. You decide to prepare this buffer using formic acid, CHO2H,(Ka =1.8 x 104) and sodium formate, NaCHO2. The concentration of formic acid, CHO2H, in this buffer is 0.150M. 10. (10 pts) Calculate the concentration of formate, CHO2. Report 2 significant figures. Show work. 11. (5 pts) How many grams of formic acid (46.03 g/mol) should...
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...
Question 2 Salicylic acid, HC,H,0, is a chemical compound used in many facial cleansing products. Figure 2. Structure of Salicylic Acid a) Identify the ionizable hydrogen (HA or Hg) with the correct pk НА lonizable Hydrogen pK, 2.97 HA 13.7 :91 3 19- 10 b) The solubility of salicylic acid in water is 0.210-96 HC,HsOs by mass. What is the pH of an aqueous solution of salicylic acid at saturation? (Assume the density of the solution is 1.00 g/mL). 2-U...
Please help, I'm so confused!!!! This is due wednesday night!!!
i'm gonna fail :((((
pH of Buffer Solutions Procedure: Acetic Acid-Sodium Acetate Buffer (pKa acetic acid = 4.75) Weigh about 3.5 g of Na2C2H302 3H2O, record the exact mass, and add to a 250 ml beaker. Measure exactly 8.8 mL of 3.0 M acetic acid (use 10 mL grad cylinder) and add to the beaker containing the sodium acetate. • Measure exactly 55.6 mL of distilled water and add to...
#4.. please show work and dont skip steps. trying to learn how
to do this for the actual biochemistry lab
PART B. PRACTICE CALCULATIONS Convert units (show your work!): a. 0.01 ml b. 0.05 M = MM c. 0.2 M = mM d. 10 mM - M 2. Molar mass of Na olar mass of NaOH is 40 /mol. How many grams of NaOH do you have to take to prepare a. 11 of 10 M solution of NaOH? b....
please help
Mustrates treat all types of ilnesses. Background Aspirin is a prodrug of salicylic acid, the actual active drug. A compound related to salicylic acid, salicin, was first isolated from willow bark in the mid 1700's, but willow-bark extract was used by the andient Greeks as a treatment for pain and fever. Salicylic acid (and many related phenols) are very hard on your Ho stomach, but when esterified, as aspirin is, they are much better tolerated. Simple esters are...
4. Mr. Burnes bought a bottle of vinegar and wondered how concentrated the acetic acid (CH-COOH; mm = 60.05 g/mol) was inside. He titrated it with 0.00182 M NaOH that he found in a general chemistry laboratory. It took 9.90 mL of NaOH to reach the equivalence point. See titration curve on next page. A. What is the concentration of acetic acid if 23.7 mL of vinegar was used for the titration? B. Mr. Burnes bought the economy size bottle...
i am having trouble determining the calculations for table 3.
Can you please show me how to do the calculations? thank you!
Mass Formula Weight Amount Needed Amount NeededWeighed Chemical Ingredient Formula(g/mol) CO3 03 349 13.2 4 oz. Baking Soda Epsom Salt 2 oz. blo Corn Starch 2 oz. slo v Citric Acid 2 oz. Dried Flower Petals Least amount possible Witch Hazel Soap Colorant 4-6 drops 4-6 drops Essential Oil 119 Coconut Oill 17 g Solution pH Bath Bomb...
PLEASE COMPLETE ALL ANSWER. SHOW ALL WORK.
For questions 10 and 11. You need a buffer with a pH of 3.50 for a certain experiment. You decide to prepare this buffer using formic acid, CHO2H,(Ka =1.8 x 104) and sodium formate, NaCHO2. The concentration of formic acid, CHO2H, in this buffer is 0.150M. 10. (10 pts) Calculate the concentration of formate, CHO2. Report 2 significant figures. Show work. 11. (5 pts) How many grams of formic acid (46.03 g/mol) should...
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...
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