Homework Answers
Buffer consists of weak acid /base and salt with strong base / acid.
Add Answer to:
1. Indicate if the following pairs would form a buffer: a. HBr and KBr: Yes or No b. HCHO and KCHO: Yes or No c. N...
17. Rank the following organic molecules from weakest to strongest acid. Give a short explanation of...
17. Rank the following organic molecules from weakest to strongest acid. Give a short explanation of your ranking. A. Acetic Acid (CH3COOH) B. Ethanol (CH3OH) C. Trifluoeacetic acid (CF3COOH) Weakest Acid Strongest Acid Explain: 18. Write the net ionic equation that occurs when potassium hydroxide is added to a hydrofluoric acid/sodium fluioride buffer. 19. Calculate the volume of 0.550 M sodium acetate that must be added to 20. mL of 0.450 M acetic acid in order to make a buffer...
1. 200 mL of an aqueous solution contains 0.030 M concentrations of both Pb2+ and Ag+....
1. 200 mL of an aqueous solution contains 0.030 M
concentrations of both Pb2+ and Ag+. If 100
mL of 6.0 x 10-2 M NaCl is added to this solution will a
precipitate form? If so, what will the
precipitate be? The Ksp values for PbCl2 and AgCl are 1.7 x
10-5 and 1.8 x 10-10] 2. Which of the following is the expression
for the solubility product of Ba3(AsO4)2? 3. The pKa of a weak acid
is 6.50. What...
QUESTION 1 Which of the following solutions is a buffer? A mixture of HF and HBr A...
QUESTION 1 Which of the following solutions is a buffer? A mixture of HF and HBr A mixture of H2SO4 and Na2SO4 A mixture of NaI and HI A mixture of NaF and HF 1 points QUESTION 2 What is the [A-]/[HA] ratio in a buffer made of HA and its conjugate base, A-, and has a pH of 8.00 ? The pKa of HA is 6.00 1:1 1:10 1:100 10:1 100:1 1 points QUESTION 3 If the molar...
calculate the molar solubility of Cr(OH)3 in a solution with a pH of 11.5 knowing that...
calculate the molar solubility of Cr(OH)3 in a
solution with a pH of 11.5 knowing that Ksp(Cr(OH)3) = 6.7 x
10^(-31)
1. Calculate the molar solubility of Cr(OH), in a solution with a pH of 11.5 knowing that Kop(Cr(OH)2) = 6.7 x 10" 2. What is the pH of a 0.895M sodium fluoride (NaF) solution knowing that the hydrofluoric acid is 7.11 x 10 of 3. Calculate the molar solubility of antimony sulfide (Sb2S) in water knowing K =1.6 x...
please help!! calculate pH of solutions on second page a-c!! 1. (4 points) A buffer solution...
please help!! calculate pH of solutions on second page a-c!!
1. (4 points) A buffer solution is created with C;H,NH, and 0.012 M C;HsNH2. The K, for C,H,NH2 is 4.7 х 104. What is the concentration of C,HNH, in the buffer solution that has a pH of 11.50? а. What is the concentration of the buffer solution if 0.0011 M HC is added to the buffer in part a.? b. Why is the buffer a basic solution? Could this weak...
22. Which of the following pairs of compounds and ions could be used to form a...
22. Which of the following pairs of compounds and ions could be used to form a buffer solution? (a) 0.10 M HCl and 0.10 M Naci (b) 0.10 M NH4Cl and 0.10 M NH3 (c) 0.10 M HNO2 and 1.0 x 10'M NaNO, 23. An activity coefficient (a) measures the deviation of behavior of ions from ideality. (b) is obtained by multiplying the concentration of a solution times the ionic strength. (c) replaces the concentration term in chemical calculations. It...
6) Which of the following statements is true? A) If Q = K, it means the reaction is not at equilibrium B) If Q<...
6) Which of the following statements is true? A) If Q = K, it means the reaction is not at equilibrium B) If Q< K, it means the forward reaction will proceed (to the right) to form more reactants. C) If Q< K, it means the reverse reaction will proceed (to the left) to form more reactants. D) If Q> K, it means the forward reaction will proceed (to the right) to form more reactants E) If Q> K, it...
5) Determine the value of Kc for the following reaction if the equilibrium concentrations are as...
5) Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [NO2]eq = 0.85 M and [NO]eq=0.38 M. 2 NO2(g) - N2048) A) 2.2 B) 1.9 C) 0.022 D) 0.22 E) 0.53 6) Which of the following statements is true? A) If Q=K, it means the reaction is not at equilibrium. B) If Q<K, it means the forward reaction will proceed to the right) to form more reactants. C) IFO <K, it means the...
Here is the updated version (1). A buffer solution is made that is 0.458 M in...
Here is the updated version (1). A buffer solution is made that is 0.458 M in H2CO3 and 0.458 M in KHCO3 . If Ka1 for H2CO3 is 4.20 x 10^-7, what is the pH of the buffer solution? pH = _____ Write the net ionic equation for the reaction that occurs when 0.104 mol HCl is added to 1.00 L of the buffer solution. (Use the lowest possible coefficients. Omit states of matter. Use H30+ instead of H+) ____...
Buffers 1. Indicate which of the following pairs of compounds could be used to make a buffer solution by placing an X i...
Buffers 1. Indicate which of the following pairs of compounds could be used to make a buffer solution by placing an X in the appropriate column. Buffer Solution | Not a Buffer Solution Pair of Compounds HF and Cl H.COs and OH HNO2 and NO NHa and NH L 2. Write out the reaction of acetic acid CH.COOH reacting with water. 3. What is the pH of a buffer solution in which the (CH3COOH) is 0.229 M and the (CH...
17. Rank the following organic molecules from weakest to strongest acid. Give a short explanation of your ranking. A. Acetic Acid (CH3COOH) B. Ethanol (CH3OH) C. Trifluoeacetic acid (CF3COOH) Weakest Acid Strongest Acid Explain: 18. Write the net ionic equation that occurs when potassium hydroxide is added to a hydrofluoric acid/sodium fluioride buffer. 19. Calculate the volume of 0.550 M sodium acetate that must be added to 20. mL of 0.450 M acetic acid in order to make a buffer...
1. 200 mL of an aqueous solution contains 0.030 M
concentrations of both Pb2+ and Ag+. If 100
mL of 6.0 x 10-2 M NaCl is added to this solution will a
precipitate form? If so, what will the
precipitate be? The Ksp values for PbCl2 and AgCl are 1.7 x
10-5 and 1.8 x 10-10] 2. Which of the following is the expression
for the solubility product of Ba3(AsO4)2? 3. The pKa of a weak acid
is 6.50. What...
calculate the molar solubility of Cr(OH)3 in a
solution with a pH of 11.5 knowing that Ksp(Cr(OH)3) = 6.7 x
10^(-31)
1. Calculate the molar solubility of Cr(OH), in a solution with a pH of 11.5 knowing that Kop(Cr(OH)2) = 6.7 x 10" 2. What is the pH of a 0.895M sodium fluoride (NaF) solution knowing that the hydrofluoric acid is 7.11 x 10 of 3. Calculate the molar solubility of antimony sulfide (Sb2S) in water knowing K =1.6 x...
please help!! calculate pH of solutions on second page a-c!!
1. (4 points) A buffer solution is created with C;H,NH, and 0.012 M C;HsNH2. The K, for C,H,NH2 is 4.7 х 104. What is the concentration of C,HNH, in the buffer solution that has a pH of 11.50? а. What is the concentration of the buffer solution if 0.0011 M HC is added to the buffer in part a.? b. Why is the buffer a basic solution? Could this weak...
22. Which of the following pairs of compounds and ions could be used to form a buffer solution? (a) 0.10 M HCl and 0.10 M Naci (b) 0.10 M NH4Cl and 0.10 M NH3 (c) 0.10 M HNO2 and 1.0 x 10'M NaNO, 23. An activity coefficient (a) measures the deviation of behavior of ions from ideality. (b) is obtained by multiplying the concentration of a solution times the ionic strength. (c) replaces the concentration term in chemical calculations. It...
6) Which of the following statements is true? A) If Q = K, it means the reaction is not at equilibrium B) If Q< K, it means the forward reaction will proceed (to the right) to form more reactants. C) If Q< K, it means the reverse reaction will proceed (to the left) to form more reactants. D) If Q> K, it means the forward reaction will proceed (to the right) to form more reactants E) If Q> K, it...
5) Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [NO2]eq = 0.85 M and [NO]eq=0.38 M. 2 NO2(g) - N2048) A) 2.2 B) 1.9 C) 0.022 D) 0.22 E) 0.53 6) Which of the following statements is true? A) If Q=K, it means the reaction is not at equilibrium. B) If Q<K, it means the forward reaction will proceed to the right) to form more reactants. C) IFO <K, it means the...
Buffers 1. Indicate which of the following pairs of compounds could be used to make a buffer solution by placing an X in the appropriate column. Buffer Solution | Not a Buffer Solution Pair of Compounds HF and Cl H.COs and OH HNO2 and NO NHa and NH L 2. Write out the reaction of acetic acid CH.COOH reacting with water. 3. What is the pH of a buffer solution in which the (CH3COOH) is 0.229 M and the (CH...
Most questions answered within 3 hours.
-
Temperament can play a role in parenting style and, sometimes, it
can be challenging for a...
asked 6 minutes ago -
Company XYZ uses a standard costing to evaluate operational
performance against budget.
The following budget and...
asked 7 minutes ago -
How does procurement play a role in the value chain process?
Give an example.
asked 18 minutes ago -
6.) A clay vase on a potter's wheel experiences an angular
acceleration of 7.90 rad/s2 due...
asked 18 minutes ago -
Question about JS form validation:
I want to check these two input (name, question) with
one...
asked 20 minutes ago -
Acetic acid, CH3COOH, Ka = 1.8 x 10-5 can be converted
into the acetate ion, CH3COO-2,...
asked 21 minutes ago -
An optical fiber consisting of a core made of glass (n = 1.667)
surrounded by a...
asked 23 minutes ago -
Bright and dark fringes are seen on a screen when light from a
single source reaches...
asked 31 minutes ago -
C9H12
13C NMR
7 peaks
1H NMR
δ 1.13 (triplet, 3H); δ 1.71 (multiplet, 2H); δ...
asked 43 minutes ago -
Consider a monoatomic ideal gas undergoing the following cycle:
starting point (a), pressure increases at a...
asked 43 minutes ago -
10) (a) In a hypothesis testing procedure explain the difference
between a type 1 and type...
asked 45 minutes ago -
Given the line notation, identify the anodic and
cathodic reactions and overall reaction:
Ag(s)| AgCl(s) |...
asked 1 hour ago