Answered: What quantity in moles of CH3NH;CI need…

What quantity in moles of CH3NH;CI need to be added to 200.0 mL of a 0.500 M solution of CH3NH2 (Kb for CH;NH2 is 4.4 x 10-4) to make a buffer with a pH of 10.85?

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter14: Equilibria In Acid-base Solutions

Section: Chapter Questions

Problem 79QAP: How many grams of NaF must be added to 70.00 mL of 0.150 M HNO3 to obtain a buffer with a pH of...

See similar textbooks

Related questions

Q: A buffer with a pH of 4.14 contains 0.31 M of sodium benzoate and 0.36 M of benzoic acid. What is…

A: Given data :

Q: What is the pH of the buffer solution that contains 1.6 g of NH4Cl in 250 mL of 0.060 M NH3? Is the…

A: pH of a basic buffer can be calculated using Henderson-Hasselbach equation: pH=14-(pKb+logB+BOH)

Q: What quantity in moles of NAOH need to be added to 200.0 mL of a 0.200 M solution of HF to make a…

A: Initial concentration of base is equal to final concentration of salt because base must be limiting…

Q: What is the pH of a 1.0 L buffer made with 0.300 mol of HF (Ka = 6.8 x 104) and 0.200 mol of NaF to…

A: The question is based on the concept of buffer. we have to calculate pH of the buffer after adding…

Q: A buffer solution contains 0.753 M KClO2 (Ka = 1.1 x 10-2) and 0.659 M HClO2. If 0.244 moles of NaOH…

Q: What is the pH of a 1.0 L buffer made with 0.300 mol of HF (Ka = 6.8 × 10⁻⁴) and 0.200 mol of NaF to…

A: By Henderson Hasselbalch equation, pH of a buffer = pKa + log [salt] /[acid] Here, acid is HF and…

Q: What is the pH of a 1.0 L buffer made with 0.300 mol of HF (Ka = 6.8 × 10⁻⁴) and 0.200 mol of NaF to…

A: HF + NaOH -----> NaF + H2O Given 0.3 mol 0.040 mol…

Q: 3. What is the pH of a buffer made by mixing 1.00 L of 0.020 M benzoic acid, HC7H5O2, with 3.00 L…

A: Given, the molarity of benzoic acid = 0.020 MMolarity of sodium benzoate = 0.060 MThe total volume…

Q: How many grams of hydrofluoric acid, HF, should you add to a 1.65 L of a 2.65 M sodium fluoride…

A: Given: pH = 3.45 pKa = 7.1 x 10-4 Volume, V (NaF) = 1.65 L Molarity, M (NaF) = 2.65 M The strong…

Q: What quantity in moles of NaOH need to be added to 200.0 mL of a 0.200 M solution of HF to make a…

A: Henderson-Hasselbach equation: pH= pKa + log [base]/[acid]. pKa = -log Ka Given, Ka of HF = 6.8…

Q: What is the pH of a buffer made from 0.580 mol of CH;NH2 (Kb = 4.4 x 10-4) and 0.220 mol of CH3NH31?

Q: What ratio of NaCN to HCN is needed to prepare a pH 10.00 buffer? (Ka of HCN is 4.9 x 10-10)

Q: What is the pH of a buffer made from 0.580 mol of CH,NH, (Kb = 4.4 x 10-4) and 0.250 mol of CH;NH,1?

A: ans: PH of solution is 11 Explanation : given: [ch3nh2]= 0.580 mol , [ch3nh3I]= 0.250 mol ,and…

Q: What volume of 0.200 M HCl must be added to 250.0 mL of 0.300 M sodium mandelate to produce a buffer…

Q: How many grams of solid sodium cyanide should be added to 1.50 L of 0.172 M hydrocyanic acid…

A: The given data contains, Volume of HCN =1.50 LMolarity of HCN =0.172 MpH =8.570

Q: Consider a buffer made by adding 132.8 g of NaC,H;O2 to 300.0 mL of 1.31 M HC,H;O2 (Ka = 6.3 x 105)…

Q: Consider a buffer made by adding 42.3 g of (CH3)2NH2I to 250.0 mL of 1.42 M (CH:)2NH (Kb = 5.4 x 10…

A: (CH3)2NH is a weak base and (CH3)2NH2I is its salt with a strong acid HI. Thus, the mixture is a…

Q: Consider a buffer made by adding 132.8 g of NaC,H5O2 to 300.0 mL of 1.31 M HC,H5O2 (Ka = 6.3 x 10-5)…

Q: What volume of 0.110 M Hydrochloric acid needs to be added to 30 mL of 0.100 M ammonia to make a…

A: We know the Henderson-Hasselback equation is, pH=pKa +salt/acid Given Value; The concentration of…

Q: How does diluting a pH 4.00 buffer with an equal volume of pure water affect its pH?

A: Mathematical equation for Henderson-Hasselbalch equation is shown below where V is the total volume…

Q: What is the pH of a buffer that contains 0.15 M CH3COOH and 0.10 M NaCH3COO (K, = 1.8 x 10$)?

A: Given : Concentration of weak acid CH3COOH = 0.15 M And concentration of conjugate base salt of weak…

Q: You have a 272.5-ml. sample of 1.2 M acetic acid (Kg = 1.8 x 10). Calculate the pH after adding…

Q: Consider a buffer made by adding 46.9 g of (CH₃)₂NH₂I to 250.0 mL of 1.42 M (CH₃)₂NH (Kb = 5.4 x…

A: Buffer is the solution that resists the change in pH. This solution tries to main the minimum…

Q: 6. A buffer solution contains 0.1OM benzoic acid (C,H5COOH, Ka = 6.3 x 10) and 0.10M potassium…

A: pH can be calculated by using henderson equation pH = pka + log (salt/ acid) Pka = - log 6.3 x10-5…

Q: An acetic acid buffer contains 0.6 M CH3COOH and 0.6 M CH3COONA. (CH3COOH has a K, 1.76 x 105.) What…

A: Given- Concentration of CH3COOH= 0.6M Concentration of CH3COONa= 0.6M Ka of CH3COOH=1.76 ×10 -5…

Q: Consider a buffer made by adding 132.8 g of NaC₇H₅O₂ to 300.0 mL of 1.09 M HC₇H₅O₂ (Ka = 6.3 x 10⁻⁵)…

Q: What mass of sodium benzoate should you add to 150.0 mL of a 0.17 molL−1 benzoic acid solution to…

Q: What is the pH of a buffer that contains 0.250 mol of CH3NH2 and 0.450 mole of CH3NH3CI? Kb for…

Q: What are the [H₃O⁺] and the pH of a propanoic acid–propanoate buffer that consists of 0.35 M…

A: First of all write the equation for given compound: CH3CH2COONa→CH3CH2COO-+Na+ CH3CH2OOH=0.15…

Q: Determine the mass of solid NaCH3COO that must be dissolved in an existing 500.0 mL solution of…

A: Buffer solution is the solution in which on addition of small amount of acid or base the pH of the…

Q: Consider a buffer made by adding 52.3 g of (CH3),NH2I to 250.0mL of 1.42 M (CH3)¿NH (Kb = 5.4 x…

A: The concentration or Molarity of salt is calculated by - M = w×1000/m×V Here, M = Molarity of Salt,…

Q: How many moles of CH,NH,CI need to be added to 200.0 mL of a 0.500 M solution of CH,NH, (Kb for…

A: pH is the negative logarithm of H+ concentration to the base 10 represented by: pH = -logH+ For a…

Q: What is the pH of a 1.0 L buffer made with 0.300 mol of HF (Ka = 6.8 × 10⁻⁴) and 0.200 mol of NaF to…

A: In this question we have to tell the PH of the buffer solution after adding 0.04 mol of HCl.

Q: How many mL of 1.0 M NaOH must be added to 100. mL of 0.050 M HC2H3O2 to make a buffer with a pH =…

A: We have given that pH = 5.0 Ka = 1.8×10-5 Pka = -log(1.8×10-5) = 4.74 Concentration of Acetic Acid =…

Q: How many moles of CH:NH;CI need to be added to 200.0 mL of a 0.500 M solution of CH;NH2 (Kb for…

A: A buffer is defined as a solution which can resist any change in the pH on slight addition of an…

Q: A 0.10 M solution of NaOH is used to titrate 20 mL of 0.18 M HCH02 (Ka= 1.8 x10): What volume of…

Q: Consider the following buffer system: 1.03 M H3PO4 and 0.93 M H₂PO4-. What is the pH of such a…

A: Acidic buffer :- A mixture of weak acid and its salt with strong base is known as acidic buffer…

Q: What mass (in g) of ammonium chloride (NH4Cl) should be added to 2.60 L of a 0.155 M NH3 to obtain a…

A: Buffer solution is made of weak acid or base and their corresponding conjugate base or acid…

Q: What is the pH of a buffer system that is 0.25 M in NH3 and 0.26 M in NHẠCI? Kb NH3 = 1.8 x 105

A: To determine pH of buffer solution Henderson- Hasselbalch equation can be used. Given solution is…

Q: What is the pH of a 1.0 L buffer made with 0.300 mol of HF (Ka = 6.8 x 104) and 0.200 mol of NaF to…

A: they form a buffer solution.

Q: 5. What volume of 1.50 M NaOH must be added to 200.0 mL of 1.00 M glycolic acid (HC2H3O3) to produce…

A: Given : Concentration of NaOH = 1.50 M Concentration of glycolic acid = 1.00 M Volume of glycolic…

Q: What is the pH of a 1.0 L buffer made with 0.300 mol of HF (Ka = 6.8 × 10⁻⁴) and 0.200 mol of NaF to…

Q: How many grams of solid sodium fluoride should be added to 0.500 L of a 9.49x10-2 M hydrofluoric…

Q: Consider the titration of a 60.0 mL of 0.355 M weak acid HA (Ka = 4.2 x 10⁻⁶) with 0.400 M KOH.…

Q: What is the pH of a buffer solution made by adding 0.41 g of NaC2H3O2 to 100. mL of 0.10 M HC2H302?…

Q: Consider a buffer made by adding 52.3 g of (CH3),NH,l to 250.0 mL of 1.42 M (CH3)2NH (Kb = 5.4 x…

Q: What is the pH of a buffer solution prepared by dissolving 33.7 g NaCH3COO in a sufficient volume of…

A: Solution -

Q: The Ka of hyperchlorous acid, HClO is 3.50 X 10-8. How many grams of NaClO (molar mass = 74.5…

A: 1- First calculate the concentration of NaClO : Using the Henderson equation, pH = pKa +…

Question

100%

What quantity in moles of CH3NH;CI need to be added to 200.0 mL of
a 0.500 M solution of CH3NH2 (Kb for CH3NH2 is 4.4 x 10-4) to make
a buffer with a pH of 10.85?

Expert Solution

This question has been solved!

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

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Similar questions

A buffer is prepared by dissolving 0.062 mol of sodium fluoride in 127 mL of 0.0399 M hydrofluoric acid. Assume no volume change after NaF is added. Calculate the pH of this buffer.
What mass of NH4Cl must be added to 0.750 L of a 0.100-M solution of NH3 to give a buffer solution with a pH of 9.26? (Him: Assume a negligible change in volume as the solid is added.)
A 10.00-g sample of the ionic compound NaA, where A is the anion of a weak acid, was dissolved in enough water to make 100.0 mL of solution and was then titrated with 0.100 M HCl. After 500.0 mL HCl was added, the pH was 5.00. The experimenter found that 1.00 L of 0.100 M HCl was required to reach the stoichiometric point of the titration. a. What is the molar mass of NaA? b. Calculate the pH of the solution at the stoichiometric point of the titration.
The species called glacial acetic acid is 98% acetic acid by mass (d=1.0542g/mL). What volume of glacial acetic acid must be added to 100.0 mL of 1.25 M NaOH to give a buffer with a pH of 4.20?
Sketch two pH curves, one for the titration of a weak acid with a strong base and one for a strong acid with a strong base. How are they similar? How are they different? Account for the similarities and the differences.
How many grams of NaF must be added to 70.00 mL of 0.150 M HNO3 to obtain a buffer with a pH of 4.68?
A buffer solution is prepared by adding 5.50 g of ammonium chloride and 0.0188 mol of ammonia to enough water to make 155 mL of solution. (a) What is the pH of the buffer? (b) If enough water is added to double the volume, what is the pH of the solution?
How many grams of NaOH must be added to 1.00 L of a buffer made from 0.150 M NH3 and 10.0 g of NH4Cl so that the pH increases by one unit (e.g., from 5 to 6)? Ka for NH4+ is 5.61010.
You want to make a buffer with a pH of 10.00 from NH4+/NH3. (a) What must the [ NH4+ ]/[ NH3 ]ratio be? (b) How many moles of NH4Cl must be added to 465 mL of an aqueous solution of 1.24 M NH3 to give this pH? (c) How many milliliters of 0.236 M NH3 must be added to 2.08 g of NH4Cl to give this pH? (d) What volume of 0.499 M NH3 must be added to 395 mL, of 0.109 M NH4Cl to give this pH?
What volume of 0.200 M HCl must be added to 500.0 mL of 0.250 M NH3 to have a buffer with a pH of 9.00?
When 40.00 mL of a weak monoprotic acid solution is titrated with 0.100-M NaOH, the equivalence point is reached when 35.00 mL base has been added. After 20.00 mL NaOH solution has been added, the titration mixture has a pH of 5.75. Calculate the ionization constant of the acid.
Sketch the titration curve for a weak acid titrated by a strong base. When performing calculations concerning weak acidstrong base titrations, the general two-slep procedure is to solve a stoichiometry problem first, then to solve an equilibrium problem to determine the pH. What reaction takes place in the stoichiometry part of the problem? What is assumed about this reaction? At the various points in your titration curve, list the major species present after the strong base (NaOH, for example) reacts to completion with the weak acid, HA. What equilibrium problem would you solve at the various points in your titration curve to calculate the pH? Why is pH 7.0 at the equivalence point of a weak acid-strong base titration? Does the pH at the halfway point to equivalence have to be less than 7.0? What does the pH at the halfway point equal? Compare and contrast the titration curves for a strong acidstrong base titration and a weak acidstrong base titration.