In the pre-lab notebook, calculate that amount of sodium phosphate needed for: a. 20 mL of...
-
In the pre-lab notebook, calculate that amount of sodium phosphate needed for:
-
a. 20 mL of 0.02 M sodium phosphate, pH 7.0
-
b. 10 mL of 0.02 M sodium phosphate, pH 7.0 with 0.4 M NaCl
-
c. 10 mL of 0.02 M sodium phosphate, pH 7.0 with 1.0 M NaCl
Homework Answers
Add Answer to:
In the pre-lab notebook, calculate that amount of sodium
phosphate needed for:
a. 20 mL of...
Pre-Lab Assignment Hydrogen Phosphate Buffer System This pre-lab assignment is mandatory. You will receive a zero f...
Pre-Lab Assignment Hydrogen Phosphate Buffer System This pre-lab assignment is mandatory. You will receive a zero for the experiment if the pre-lab assignment is not completed before the beginning of the lab session. 1. Calculate the masses of the conjugate acid and base needed to prepare each of the six buffer solutions listed in the table on the left. (p of H,PO,= 6.70) Assume the availability of the phosphate salts listed in the table on the right. Fill out the...
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...
4. Calculate the volume of 1 M sodium hydroxide (NaOH) needed to prepare 10 ml of...
4. Calculate the volume of 1 M sodium hydroxide (NaOH) needed to prepare 10 ml of a 0.10 M sodium hydroxide solution. 5. Calculate the volume of 1 M hydrochloric acid (HCI) needed to prepare 10 mL of a 0.10 M hydrochloric acid solution. 6. Determine the volumes of 0.10 M CH3COOH and 0.10 M CH3COONa required to prepare 10 ml of the following pH buffers. (Note: the pka of CH3COOH =4.7) C. pH 3.7 b. pH 47 C. pH...
9.20 Investigation of Buffers Pre-Lab 3. If 20.00 mL of a 0.060 M NaCl solution is...
9.20 Investigation of Buffers Pre-Lab 3. If 20.00 mL of a 0.060 M NaCl solution is titrated with 0.100 M NaOH: a. What would the concentration of OH') in the beaker be after 1.00 mL of the NaOH was added? b. What is the pH of this solution? c. Is this more than a l-pH unit change with the initial concentration of the NaCl solution?
1) How would you make 300 ml of a 0.1 M sodium phosphate buffer, pH 7.0...
1) How would you make 300 ml of a 0.1 M sodium phosphate buffer, pH 7.0 (pKa = 7.2) phosphate dibasic (the conjugate base). 2) What are the concentrations of acetate and acetic acid in a 0.2 M acetate buffer pH 5.3? The pKa for acetic acid is 4.76. 3)You have 100 ml of 0.1 M acetate buffer pH 5.2 (pKa 4.76). You add 10 ml of 0.1 M NaOH. Calculate the resulting change in pH and the buffering capacity...
pre lab #2 & #3 vvith the end point of the titration, you can calculate the...
pre lab #2 & #3
vvith the end point of the titration, you can calculate the number on" of sodium hydroxide delivered from the stoichiometry. LEARNING OUTCOMES 1. Understand the concepts of an acid-base reaction and titration 2. Know what the end point is and how it applies to stoichiometry 3. Determine the acetic acid content in vinegar 4. Demonstrate correct titration technique 5. Use group data to draw a conclusion of the "best buy" brand of vinegar PRE-LABORATORY ASSIGNMENT...
Acid-Base Titration PRE-LABORATORY ASSIGNMENT This assignment must be completed in your notebook prior to attending pre-lab...
Acid-Base Titration PRE-LABORATORY ASSIGNMENT This assignment must be completed in your notebook prior to attending pre-lab lecture. 1. Sketch a picture of a 50 mL buret. Clearly label the location on the 0.00 mL line and the 50.00 mL line on the buret. Refer to appendix 5E for information about a buret. 2. Write the balanced chemical equation that will be used during this titration experiment. 3. Assume a student performed the acid-base titration experiment that you will be doing...
Thanks! BEER'S LAW EXPERIMENT S PRE-LAB QUESTIONS Fully answer these questions in your laboratory notebook before...
Thanks!
BEER'S LAW EXPERIMENT S PRE-LAB QUESTIONS Fully answer these questions in your laboratory notebook before coming to lab. work for numerical calculations. 1. The wavelength at which a substance absorbs the most light is called the The metal complex Cu(C,N,H)SO, has a purple (violet) color. What would you guess as the value 2. If a solution sample has an extinction coefficient of 7.53 L mol cm,a pathlength of 1.50 cm, and an absorbance of 0.408, what is the concentration...
10 mL of a 0.30 M sodium phosphate solution reacts with 20 mL of 0.20 M...
10 mL of a 0.30 M sodium phosphate solution reacts with 20 mL of 0.20 M lead(II) nitrate solution What mass of precipitate will form? What is the concentration of nitrate ions left in solution after the reaction is complete? What is the concentration of phosphate ions left in solution after the reaction is complete?
Lab Day and Section: Na Chemistry 112 Pre-lab Exercise Experiment 5 Exercise Number 145 A buffer...
Lab Day and Section: Na Chemistry 112 Pre-lab Exercise Experiment 5 Exercise Number 145 A buffer solution is prepared as described in (a) below. To a sample of this buffer solution is added a solution of a strong base as described in (b). (a) 100 mL of 0.18 M benzoic acid are mixed with 0.018 moles of sodium benzoate plus 100 mL of water. (b) 1.0 mL of 0.53 M KOH is added to 50 mL of the solution described...
Pre-Lab Assignment Hydrogen Phosphate Buffer System This pre-lab assignment is mandatory. You will receive a zero for the experiment if the pre-lab assignment is not completed before the beginning of the lab session. 1. Calculate the masses of the conjugate acid and base needed to prepare each of the six buffer solutions listed in the table on the left. (p of H,PO,= 6.70) Assume the availability of the phosphate salts listed in the table on the right. Fill out the...
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...
4. Calculate the volume of 1 M sodium hydroxide (NaOH) needed to prepare 10 ml of a 0.10 M sodium hydroxide solution. 5. Calculate the volume of 1 M hydrochloric acid (HCI) needed to prepare 10 mL of a 0.10 M hydrochloric acid solution. 6. Determine the volumes of 0.10 M CH3COOH and 0.10 M CH3COONa required to prepare 10 ml of the following pH buffers. (Note: the pka of CH3COOH =4.7) C. pH 3.7 b. pH 47 C. pH...
9.20 Investigation of Buffers Pre-Lab 3. If 20.00 mL of a 0.060 M NaCl solution is titrated with 0.100 M NaOH: a. What would the concentration of OH') in the beaker be after 1.00 mL of the NaOH was added? b. What is the pH of this solution? c. Is this more than a l-pH unit change with the initial concentration of the NaCl solution?
pre lab #2 & #3
vvith the end point of the titration, you can calculate the number on" of sodium hydroxide delivered from the stoichiometry. LEARNING OUTCOMES 1. Understand the concepts of an acid-base reaction and titration 2. Know what the end point is and how it applies to stoichiometry 3. Determine the acetic acid content in vinegar 4. Demonstrate correct titration technique 5. Use group data to draw a conclusion of the "best buy" brand of vinegar PRE-LABORATORY ASSIGNMENT...
Acid-Base Titration PRE-LABORATORY ASSIGNMENT This assignment must be completed in your notebook prior to attending pre-lab lecture. 1. Sketch a picture of a 50 mL buret. Clearly label the location on the 0.00 mL line and the 50.00 mL line on the buret. Refer to appendix 5E for information about a buret. 2. Write the balanced chemical equation that will be used during this titration experiment. 3. Assume a student performed the acid-base titration experiment that you will be doing...
Thanks!
BEER'S LAW EXPERIMENT S PRE-LAB QUESTIONS Fully answer these questions in your laboratory notebook before coming to lab. work for numerical calculations. 1. The wavelength at which a substance absorbs the most light is called the The metal complex Cu(C,N,H)SO, has a purple (violet) color. What would you guess as the value 2. If a solution sample has an extinction coefficient of 7.53 L mol cm,a pathlength of 1.50 cm, and an absorbance of 0.408, what is the concentration...
Lab Day and Section: Na Chemistry 112 Pre-lab Exercise Experiment 5 Exercise Number 145 A buffer solution is prepared as described in (a) below. To a sample of this buffer solution is added a solution of a strong base as described in (b). (a) 100 mL of 0.18 M benzoic acid are mixed with 0.018 moles of sodium benzoate plus 100 mL of water. (b) 1.0 mL of 0.53 M KOH is added to 50 mL of the solution described...
Most questions answered within 3 hours.
-
Assume that the situation can be expressed as a linear cost
function. Find the cost function....
asked 50 minutes ago -
(Sort ArrayList) Write the following method that sorts an
ArrayList: public static > void sort(ArrayList list)...
asked 1 hour ago -
2) A 9 volt battery is connected to a parallel plate capacitor
with an initial capacitance...
asked 51 minutes ago -
Prince Equipment has to decide whether to obtain $1,000,000 of
financing by: (1) selling common stock...
asked 2 hours ago -
The terms electrical and electronic have similar but
different meanings which of the following statement is...
asked 2 hours ago -
You wish to test the claim that the mean GPA of night students
is than 2.5...
asked 2 hours ago -
A soft drink machine outputs a mean of 25 ounces per cup. The
machine's output is...
asked 3 hours ago -
Ross Co., Westerfield, Inc., and Jordan Company announced a new
agreement to market their respective products...
asked 3 hours ago -
What is the distance run by a runner 50m/hr and
60m/hr?
asked 4 hours ago -
Write a descendant selector rule that affects the <em>
element that is contained within the
<p>...
asked 4 hours ago -
The management of an electrical manufacturing plant determined
that the mean life of their 10 watt...
asked 4 hours ago -
On January 1, Year 1, Prairie Enterprises purchased a parcel of
land for $13,100 cash. At...
asked 4 hours ago