A)
Calculate the pH of the following simple solutions:
0.08 M HCl
0.25 M KOH
0.08 M HCl + 0.25 M KOH
Is solution “c” a buffer? Why or why not?
B)
Suppose you dissolve 0.1 moles of formic acid in 1 water.
What are all of the molecules and ions you would expect to find?
Which one of the above will be found in the greatest total amount?
Which of the above will be found in very small amounts? (more than one)
A) Calculate the pH of the following simple solutions: 0.08 M HCl 0.25 M KOH 0.08...
Post Lab Activity Acids, Bases, pH, and Buffers 1. Calculate the pH of a 0.08 M NaOH solution. 2. Hydrochloric acid is a strong acid and dissociate almost 100% in aqueous solution. If two drops (0.1 mL) of 1.0 MHCI are added to pure water to make 1.0 L solution. What is the pH of this solution? 3. M. What will be the A dilute solution of hydrochloric acid (HCI) has a concentration of 0.1 pH of this solution? 4....
5. Suppose you dissolve 0.1 moles of 1-aminobutane (NH2-CH2-CH2-CH2-CH3) in 1.0 liter of water. a. What are all of the molecules and ions you would expect to find in the solution? b. Which two of the above will be found in the greatest total amount? Hint: what is the approximate pKa of an amino group?) c. Which one of the above will be found in the least total amount?
Estimate (to ±0.1) pH values of the following solutions: 1. 0.25 M lactic acid 2. 0.025 M methylamine 3. 0.25 M potassium carbonate 4. 0.08 M methylammonium chloride
5. Calculate the pH of the following solutions. (4 pts) 0S18 500257 a) 0.25 M NHCI solution b) 0.10 M NaHCO3 solution 6. b) A student mixes 8.203 g of NaC2H3O2 with 100 mL of 1.0 M HC2H3O2, what is the pH of the buffer? (4 pts) b) If you add 5.0 mL of 0.5 M NaOH solution to 20.0 mL to the buffer above, what is the pH of the resulting solution? (4 pts)
Calculate the pH and pOH of the following solutions: a. stomach acid in which [HCl] = 0.155 M b. 0.00500 M HNO3 c. a 2:1 mixture of 0.0125 M HCl and 0.0125 M NaOH d. a 3:1 mixture of 0.0125 M H2SO4 and 0.0125 M KOH
Calculate the pH of a buffer solution made with 0.75 M HC2H3O2 and 0.25 M NaC2H3O2 at 25 degrees Celsius. (Ka = 1.8 x 10-5) Which direction will the reaction move in when 1.0 mL of HCl is added to the above buffer solution?
Calculate the pH of a buffer solution made with 0.75 M HC2H3O2 and 0.25 M NaC2H3O2 at 25 degrees Celsius. (Ka = 1.8 x 10-5) Which direction will the reaction move in when 1.0 mL of HCl is added to the above buffer solution?
Calculate how to prepare 750 ml of 0.25 M sodium formate buffer
at pH 4. Use your textbook to determine the molecular weight and
pKa of the acid and base. Calculate the grams of sodium formate and
number of milliliters of formic acid required. THEN using this
stock solution, calculate and describe how you would prepare 100 ml
of a 10 mM formate buffer, pH 3.5. By the way, what is the molarity
of formic acid?
with pH 7.6 and...
In this experiment you will be measuring pH for several
different solutions. A pH probe will be used rather than pH paper
as it will be more accurate.
You will be testing the pH of six solutions: deionized water,
0.1 M HCl, 0.1 M HCH3COO, 0.1 M NaCH3COO, 0.1
M NaOH, and a buffer made by mixing equal parts of
HCH3COO and NaCH3COO.
You will measure the pH of each solution three times:
Neat - just the solution
After the...
unknown solutions A and B are 0.1 M solutions of
either HCI or NaOH. According to your pH measurement, which is
which
10% Bleach Question: 1. Unknown solutions A and B are 0.1 M solutions of either HCl or NaOH. According to your pH measurements, which is which? 1 2. The pH of pure water is 7. Comment on how closely your measured pH values from each measurement method compared to the expected value. Which method was more appropriate for...