Which one of the following is a buffer sol'nHCN k,-6.2x10 10CH:COОH ka%31.8х105HNO3 and HOCI Ka>>1О 0.20 М СНЗСООНO 1,0 M HNO, and 1.0 M NaOHO 1.0M CH3COOH + 1.0M NACH CO000.4M HCN + 0.2 M NaCH:COOO01M KCN and NaCl What concentration of formic acid, HCOOH, in M is required to give a solutionwith a pH of 3.00? [K3(HCOOH) = 1.77 × 10-4]O 1.00x10 ³ MO 5.65x10 3 MO 1.77x10² MO 2.34x10 MO 1.77x10ª M

Answered: Image /qna-images/answer/b1c6207d-85cb-4dd5-b239-f6306b20fd6c.jpg

Which one of the following is a buffer sol'n HCN k,=6.2x1010 CH3COOH k,=1.8x105 HNO3 and HCI Ka>>1 O 0.20 M CH3COOH O 1,0 M HNO3 and 1.0 M NaOH O 1.0 M CH3COOH + 1.0 M NaCH3COO O 0.4 M HCN +0.2 M NaCH3COO O 0.1 M KCN and NaCl

Which one of the following is a buffer sol'n HCN k,=6.2x1010 CH3COOH k,=1.8x105 HNO3 and HCI Ka>>1 O 0.20 M CH3COOH O 1,0 M HNO3 and 1.0 M NaOH O 1.0 M CH3COOH + 1.0 M NaCH3COO O 0.4 M HCN +0.2 M NaCH3COO O 0.1 M KCN and NaCl

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Related questions

Q: Which of the following statement is correct about a solution contains 0.4 M NaH2PO4 and 0.2 M H3PO4?…

A: H3PO4 and NaH2PO4 are acid-conjugate pair Applying Henderson hasselbalech equation pH = pK +…

Q: Which of the following pairs of solutions could be mixed to produce a buffer? OI NaOH and HCI only O…

A: We know that buffer is a solution that is used to resist the change in pH. There are two types of…

Q: a weak acid (HA) is titrated with a strong base, such as NaOH what species are decreasing in…

A: When a weak acid (HA) is titrated with a strong base (NaOH), The reaction: HA + NaOH → NaA + H2O

Q: Identify whether the given solution is a buffer system. Write YES or NO 1. HClO4 / NaClO4 2.…

Q: Which of the following aqueous solutions are good buffer systems? 0.37 M potassium chloride + 0.24 M…

Q: hich one of the following combinations cannot function as a buffer solution? ) HCN and KCN

A: We have to tell which option is correct from given choices of options by telling which of givenn…

Q: Which of the following mixtures would not be considered a buffer system? HNO3/NaNO3 HF/NaF…

A: A weak acid and the corresponding salt of the weak acid form acidic buffer. On the other hand a weak…

Q: Which of the fellowing aqueous solutions are good buffer systems? O0.38 M hypochlorous acid + 0.25 M…

Q: Which one of the following is a buffer solution? 0.4 MHCN +0.2 M NaCH3COO 1,0 M HNO3 and 1.0 M NaOH…

Q: The molar solubility of insoluble salt with the generic formula, MX, is 9.1 × 10−9 M. Calculate Ksp…

A: Ksp = [M+ ][X-]

Q: A lactic acid/sodium lactate (HC3H5O3/NAC3H5O3) buffer is prepared to 0.104 mol L-1 HC3H5O3 and…

Q: The Ką of acid HA is 3.5 x 10 and the Kp of base B is 7.2 x 104. When 0.50-mol HA and 0.50-mol B are…

A: Answer: greater than 7

Q: For each combination of substances dissolved in water shown below, determine whether it forms or…

A: Buffer Solution is a water solvent based solution which consists of a mixture containing a weak acid…

Q: A 75.0 mL sample of 0.100 M NH3 is titrated with 0.100 M HCI. What is the most likely pH of the…

Q: A buffer is prepared with H₂CO3 and NaHCO, What is the correct net ionic equation describing what…

A: Buffer is mixture of weak acid with its conjugate base and vice versa. Buffer maintains the pH of…

Q: What concentration of NaF do you need to add to a 0.15M HF solution to get a buffer solution pH of…

Q: Select the buffer solution that is most effective in neutralizing added acid.

A: A solution which changes slightly only when an acid or a base is added such a solution is called as…

Q: An aqueous solution contains 0.22 M hydrocyanic acid. One Liter of this solution could be converted…

A: Buffer solution: The solution that resists the change in pH is known as a buffer solution. The…

Q: (a) Which of the following mixtures are buffer solutions? a. 1.0 M HF +0.50 M HCI b. 0.10 M HCN +…

Q: Determine the pH change when 0.093 mol HI is added to 1.00 L of a buffer solution that is 0.397 M in…

A: Answer: This is an acidic buffer whose pH can be calculated by using Henderson-Hasslebalch equation…

Q: O The pH of the solution has decreased. O The pH of the solution has increased. O The green…

A: According to the question, the color of phenolphthalein changes from clear to pink in an acid-base…

Q: An aqueous solution contains 0.27 M hydrocyanic acid. One Liter of this solution could be converted…

A: ->Given Molality of HCN = 0.27 M Volume = 1 L ->The buffer solution formed by it must…

Q: Which of the following combination can be used to prepare a buffer with a pH of 3? NaH2PO4 and…

Q: Determine the pH change when 0.087 mol HClO4 is added to 1.00 L of a buffer solution that is 0.490 M…

A: Ka of hydrocyanic acid is 6.2 * 10^-10.Now, we have to calculate the pKa of HCN.pKa = -log[Ka]On…

Q: Suppose you want to make a buffer with a pH of 6.90. Which of the following acid/conjugate base…

A: The pKa value can be used to predict the pH of the buffer solution and hence the suitable conjugate…

Q: The H2CO3/HCO3- buffer system is the major system used to control the pH of blood. What is the pH of…

Q: What concentration of HF do you need to add to a 0.35 M NaF solution to get a buffer solution pH of…

A: Using the Henderson Hasselbach equation: pH=pKa + log[conjugate base][weak acid] Dissociation of…

Q: Which of the following solutions is a good buffer system? A a solution that is 0.10 M HBr and 0.10 M…

A: A buffer is a solution which resists any change in pH on adding a small amount of acid or base. It…

Q: IUPAC name for the compound below by dragging the R or S label to the appropriate positions.

A: The given compound is

Q: Consider the following reaction: CH3 COOH + OH- -----> CH3COO- + H2O How much 5.90M NaOH must be…

A: CH3 COOH + OH- -----> CH3COO- + H2O

Q: 3.28 g of sodium acetate (82 g/mol) added to 400 mL of acetic acid to produce a buffer solution that…

A: Given 3.28 g of sodium acetate added to 400 ml of acetic acid to make buffer of pH =5 and pKa of…

Q: Which one of the following is a buffer solution? O 0.40 M HCN and 0.10 KCN Q 0.10 M KCN O 1.0 M HNO3…

A: A buffer solution is a solution that resists changes in pH when small amounts of acid or base are…

Q: Which of the following aqueous solutions are good buffer systems? O 0.22 M hydroiodic acid + 0.23 M…

A: Buffer solution is solution in which weak acid or weak base present with their conjugate acid or…

Q: Which of the following aqueous solutions are good buffer systems? O 0.14 M hypochlorous acid + 0.18…

A: Buffer solution is combination of weak acid or base with salt of weak acid or base respectively.

Q: Which of the following aqueous solutions are good buffer systems? 0.25 M ammonium nitrate + 0.34 M…

A: An acidic buffer will be formed if a weak acid is mixed with its salt. Again, a basic buffer will be…

Q: aculate the pH after 0.02 mol of HCI is added to the buffer Which of the following is NOT an…

A: A conjugate base, within the Brønsted–Lowry acid–base theory, is a species formed by the removal of…

Q: Which of the following statement is incorrect regarding buffer solutions: O Buffer solutions are…

A: Buffer solution is the solution which resist the change in pH when small amount of acid or base is…

Q: Which of the following aqueous solutions are good buffer systems? . 0.34 M nitrous acid + 0.27 M…

A: The good buffer solutions are : (a). 0.34 M nitrous acid + 0.27 M potassium nitrite, Because, HNO2…

Q: Which of the following would make a good O 0.10 M KCI and 0.10 M HCI 0.10 M Na2CO3 and 0.10 M HCI…

A: Buffer is a solution that can resist the change in even after the addition of acidic or basic…

Q: Which of the following solutions is a good buffer system? O A solution that is 0.10 M HC₂H3O2 and…

A: A buffer solution is a combination of a weak acid and its conjugate base that resist the sharp…

Q: Determine the molar concentrations of Ca2+ and Cl- in a 0.38 M calcium chloride solution. 1) 0.38 M…

Q: Which of the following aqueous solutions are good buffer systems? 0.10 M nitrous acid + 0.13 M…

A: A good buffercalled as relatively equal concentrations of a weak acid and its conjugate base.

Q: 10.0 ml of HCl was added to 100.0 ml of a 0.2 M solution of NH4Cl (Ka=1.8x10-5). If the resulting…

A: Given: 10.0 ml of HCl was added to 100.0 ml of a 0.2 M solution of NH4Cl (Ka=1.8x10-5). If the…

Q: Indicate whether each of the following solution combinations will make a buffer solution. 1. 50.0…

A: A buffer solution is a mixture of a weak acid and its salt with a strong base (Acidic buffer) or a…

Q: Which of the following aqueous solutions are good buffer systems? O 0.36 M hydrofluoric acid + 0.23…

A: A buffer system can be made from a weak acid or base with its conjugate base or acid respectively.

Q: Which of the following aqueous solutions are good buffer systems? . 0.12 M potassium acetate + 0.20…

A: To identify: The best buffer solution among the given ones.

Concept explainers

Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.

Question

Which one of the following is a buffer sol'n
HCN k,-6.2x10 10
CH:COОH ka%31.8х105
HNO3 and HOCI Ka>>1
О 0.20 М СНЗСООН
O 1,0 M HNO, and 1.0 M NaOH
O 1.0M CH3COOH + 1.0M NACH CO0
00.4M HCN + 0.2 M NaCH:COO
O01M KCN and NaCl

What concentration of formic acid, HCOOH, in M is required to give a solution
with a pH of 3.00? [K3(HCOOH) = 1.77 × 10-4]
O 1.00x10 ³ M
O 5.65x10 3 M
O 1.77x10² M
O 2.34x10 M
O 1.77x10ª M

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

Write the buffer equilibrium reaction, then write the neutralization reaction. What isthe pH of the 0.20M NH3/NH4CL buffer after the addition of 10.0 mL of 0.10 HCl to65.0 mL of buffer? The Ka for NH3 is 5.6 x 10-10
Which of the following combinations could not be used to make an effective buffer? O NH4CI and NH3 O HNO2 and NANO2 O NAHSO3 and Na,SO4 O CH,CO,H and NaCH,CO,
Which of the following aqueous mixtures will result in a buffer with a pH higher than 7.0? (For HCNO, Ka = 2.2×10-4, for NH3, Kb = 1.8×10-5 ) 10 mL of 0.1 M NH3 + 10 mL of 0.1 M HCl 10 mL of 0.1 M HCNO + 5.0 mL of 0.1 M NaOH 10 mL of 0.1 M HCNO + 10 mL of 0.1 M NaOH 10 mL of 0.1 M NH3 + 5.0 mL of 0.1 M HCl 10 mL of 0.1 M NH3 + 10 mL of 0.1 M HCNO
A buffer is prepared using 0.085 Mformic acid (HCOOH) and 0.085 Msodium formate (NaHCOO). Which of the following statements is FALSE? O The addition of 0.02 M HCI will decrease the pH slightly O The addition of 0.02 M NAOH will increase the pH slightly The formate ion can neutralize bases added to the buffer The addition of 1.0 M HCI will cause the pH to drop significantly Diluting the solution with pure water won't change the pH of the buffer
Calculate the pH of a buffer solution that is 0.200 M in HCN and 0.120 M in NaCN. The Ka of HCN is 4.90 x 10-10.
Which of the following set of reagents can be used for a buffer system? Select one or more: 0.10 M NaCl and 0.10 M HCl 0.10 M HNO2 and 0.10 M KNO2 0.10 M NH3 and 0.10 M NaOH 0.10 M NH3 and 0.10 M HCl
Which of the following aqueous solutions are good buffer systems? U 0.20 M hydroiodic acid 0.19 M sodium iodide 0.17 M nitrous acid 0.12 M sodium nitrite O0.33 M calcium chloride 0.24 M potassium chloride 0.16 M barium hydroxide 0.28 M barium bromide U0.31 M ammonia 0.39 M calcium hydroxide
Which of the following aqueous mixtures will result in a buffer with a pH higher than 7.0? (For HCNO, Ka = 2.2×10-4, for NH3, Kb = 1.8×10-5 ) 10 mL of 0.1 M NH3 + 10 mL of 0.1 M HCl 10 mL of 0.1 M NH3 + 10 mL of 0.1 M HCNO 10 mL of 0.1 M NH3 + 5.0 mL of 0.1 M HCl (Correct answer) 10 mL of 0.1 M HCNO + 10 mL of 0.1 M NaOH 10 mL of 0.1 M HCNO + 5.0 mL of 0.1 M NaOH please explain. thanks!
Equal volumes of the following pairs of solutions are mixed. Which pair will produce a buffer solution? 0.10 M HCl and 0.15 M NH3 0.10 M HCl and 0.20 M CH3COOH 0.10 M HCl and 0.05 M NaOH 0.10 M HCl and 0.20 M NaCl 0.10 M HCl and 0.05 M NH3
Buffers usually are composed of: Weak acids and conjugate bases Weak acids and weak bases Weak acids and conjugate acids 98. Which of the following leads to an overall decrease in energy of a system? Freezing Sublimation Melting Vaporization
Which of the following aqueous solutions are good buffer systems? 0.30 M ammonia + 0.34 M potassium hydroxide 0.20 M hydrochloric acid + 0.20 M sodium chloride 0.15 M sodium hydroxide + 0.24 M sodium chloride 0.21 M hydrocyanic acid + 0.15 M sodium cyanide 0.39 M sodium nitrate + 0.28 M potassium nitrate
O ACIDS AND BASES Calculating the pH of a weak base titrated with a strong acid with a 0.3000 M solution of HNO,. The p K, of An analytical chemist is titrating 160.2 mL of a 0.5000 M solution of dimethylamine ((CH₂)2NH) w dimethylamine is 3.27. Calculate the pH of the base solution after the chemist has added 280.8 mL of the HNO, solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of HNO, solution added. Round your answer to 2 decimal places... PH-0 X