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Use the formula weights of chemicals used in this laboratory in answering the questions below. Use...
PRE-LABORATORY QUESTIONS Fully answer these questions in your laboratory notebook before coming to lab. Show all...
PRE-LABORATORY QUESTIONS Fully answer these questions in your laboratory notebook before coming to lab. Show all work for numerical calculations. 1. Write out the chemical equation and equilibrium constant expression (Law of Mass Action) for the acetic acid / acetate ion buffer system. Derive the Henderson-Hasselbach equation for this system. 2. Calculate the pH of a buffer solution made by adding 1.3230 g of sodium acetate trihydrate (NaC,H,O, 3H,O) to 50.00 mL of 0.1652 M acetic acid. Assume there is...
7.Calculate the amounts of the required chemicals for preparing the following acetic acid/acetate buffer solution and its pH values. Please give detail steps of your calculation and use proper signif...
7.Calculate the amounts of the required chemicals for preparing the following acetic acid/acetate buffer solution and its pH values. Please give detail steps of your calculation and use proper significant numbers. No points will be given if only answers are given without detail and reasonable calculations (subtotal 15 pts): A. In the first step, if you are required to prepare a 2.00M sodium acetate in 200.0 mL distilled water, how many grams of sodium acetate should be added in 200...
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...
Prepare 2 liter of 0.1 M potassium phosphate buffer, pH = 7.5. Use the Henderson-Hasselbalch equation...
Prepare 2 liter of 0.1 M potassium phosphate buffer, pH = 7.5. Use the Henderson-Hasselbalch equation to calculate the amounts required of the relevant chemicals. Assume the pKa2 of H3PO4 is 7.2. The buffer can be prepared in any one of several ways. (2) Start with KH2PO4 (solid) and convert a portion of it to K2HPO4 by adding KOH. Ką and pK, for Polyprotic Acids Acid Name Ка pK Phosphoric acid, H3PO4 2.15 1st 2nd 3rd 7.1 x 10-3 6.3...
can someone please help me out with questions 1-5, please To add more information this was...
can someone please help me out with questions 1-5, please
To add more information this was given to me for a lab that used
a weak acid and we added a strong base through titration. We just
observed how the ph changes. Later we then used a buffer with a
weak acid to see how buffers affect ph change. These questions are
basically surrounded around those topics to help us prepare.
However, I'm kinda confused about answering them because weak...
Instructions: Use the information for the hypoallergenic infant formula below to answer questions 5-6 on a...
Instructions: Use the information for the hypoallergenic infant formula below to answer questions 5-6 on a separate sheet of paper. Dietary Information Gluten Free Yes Fish Free Yes Milk Free No Vegetarian Yes Egg Free Yes Vegan No Soya Free Yes Kosher No Wheat Free Yes Halaal No Nut Free Yes Nutrition Information Typical Values Unit Per 100ml Per 100g Energy kJ / kcals 300 / 72 2030 / 487 Protein g 1.98 13.4 Carbohydrate g 8.7 58.8 Fat g...
QUESTIONS TO ANSWER: Prepare a table of all chemicals used with the structure and purpose of...
QUESTIONS TO ANSWER:
Prepare a table of all chemicals used with the structure and
purpose of each.
Calculate the theoretical yield by finding limiting reactant of
the experiment by converting reactants to product (remember to show
all calculations used)
Calculate the percent yield using the limiting reactant
Calculate the Rf for triphenylmethanol. If there are two dots,
determine which one is triphenylmethanol.. ( I did not provide
data. Please let me know how I Would do this if I did)...
CHM 1210 Final practice Name: Know electrolyte table, 5 solubility rules; 26 polyatomics (name/formula) Write 7...
CHM 1210 Final practice Name: Know electrolyte table, 5 solubility rules; 26 polyatomics (name/formula) Write 7 naturally occurring diatomic molecules (name; formula, phase , charge) Write rite out strong acids and weak acids by name; formula, phase ,charge Write out the molecular, complete, and net-ionic equations for the following reactions The mixing of Cobalt(IlI) chloride and silver nitrate The mixing of acetic acid and sodium hydroxide The mixing of hydrochloric acid and cakcium hydroxide The mixing of barium chloride and...
PRE-LABORATORY QUESTIONS Fully answer these questions in your laboratory notebook before coming to lab. Show all work for numerical calculations. 1. Write out the chemical equation and equilibrium constant expression (Law of Mass Action) for the acetic acid / acetate ion buffer system. Derive the Henderson-Hasselbach equation for this system. 2. Calculate the pH of a buffer solution made by adding 1.3230 g of sodium acetate trihydrate (NaC,H,O, 3H,O) to 50.00 mL of 0.1652 M acetic acid. Assume there is...
7.Calculate the amounts of the required chemicals for preparing the following acetic acid/acetate buffer solution and its pH values. Please give detail steps of your calculation and use proper significant numbers. No points will be given if only answers are given without detail and reasonable calculations (subtotal 15 pts): A. In the first step, if you are required to prepare a 2.00M sodium acetate in 200.0 mL distilled water, how many grams of sodium acetate should be added in 200...
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...
Prepare 2 liter of 0.1 M potassium phosphate buffer, pH = 7.5. Use the Henderson-Hasselbalch equation to calculate the amounts required of the relevant chemicals. Assume the pKa2 of H3PO4 is 7.2. The buffer can be prepared in any one of several ways. (2) Start with KH2PO4 (solid) and convert a portion of it to K2HPO4 by adding KOH. Ką and pK, for Polyprotic Acids Acid Name Ка pK Phosphoric acid, H3PO4 2.15 1st 2nd 3rd 7.1 x 10-3 6.3...
can someone please help me out with questions 1-5, please
To add more information this was given to me for a lab that used
a weak acid and we added a strong base through titration. We just
observed how the ph changes. Later we then used a buffer with a
weak acid to see how buffers affect ph change. These questions are
basically surrounded around those topics to help us prepare.
However, I'm kinda confused about answering them because weak...
QUESTIONS TO ANSWER:
Prepare a table of all chemicals used with the structure and
purpose of each.
Calculate the theoretical yield by finding limiting reactant of
the experiment by converting reactants to product (remember to show
all calculations used)
Calculate the percent yield using the limiting reactant
Calculate the Rf for triphenylmethanol. If there are two dots,
determine which one is triphenylmethanol.. ( I did not provide
data. Please let me know how I Would do this if I did)...
CHM 1210 Final practice Name: Know electrolyte table, 5 solubility rules; 26 polyatomics (name/formula) Write 7 naturally occurring diatomic molecules (name; formula, phase , charge) Write rite out strong acids and weak acids by name; formula, phase ,charge Write out the molecular, complete, and net-ionic equations for the following reactions The mixing of Cobalt(IlI) chloride and silver nitrate The mixing of acetic acid and sodium hydroxide The mixing of hydrochloric acid and cakcium hydroxide The mixing of barium chloride and...
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