Question

How many moles of HCl need to be added to 200.0 mL of a 0.200 M solution of NaF to make a buffer with a pH of 2.80? (Ka for HF is 6.8 × 10⁻⁴)

How many moles of NaOH need to be added to 200.0 mL of a 0.200 M solution of HF to make a buffer with a pH of 3.20? (Ka for HF is 6.8 × 10⁻⁴)

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Science
Chemistry

Equilibrium Concepts

Other

Related Chemistry Q&A

Find answers to questions asked by students like you.

Q: What volume of 0.230 M HNO3 (nitric acid) reacts with 49.0 mL of 0.330 M Na2CO3 (sodium carbonate) i...

A: Click to see the answer

Q: Classify each of the following amines as (1) primary, secondary or tertiary and as (2) aliphatic or ...

A: Click to see the answer

Q: A student obtained the data below after performing a similar experiment described in this laboratory...

A: Click to see the answer

Q: Explain through a laboratory experiment: How is recrystallization of Acetone possible? Can it or how...

A: Recrystallization of acetone is almost not possible. 

Q: Give reaction equations for the preparation of a silane, for when silane is heated to 500C, and of ...

A: Silane is a pyrophoric hydride compound with the chemical formula of SiH4. In simple silane, the sil...

Q: DEHP is a plasticizer that is an example of phthalate, an ester of phthalic acid.a) What is a plasti...

A: A plasticizer is the substance that is added to a synthetic polymer to increase its flexibility and ...

Q: Explain the geometric isomerism that alkenes present in general and mention which one is more stable...

A: Geometric isomers are defined as those isomers that are connected in same order but they are present...

Q: Calculate the standard molar enthalpy of formation of NO(g) [N2(g) + 02(g) → 2NO(g)] from the follow...

A: Given reactions are the following. N2g+2O2g→2NO2g   ∆H0298=66.4 KJ2NOg+O2g→2NO2g   ∆H0298=-114.1 KJ

Q: Write the chemical reaction for the conversion of CO2 to HCO3-, including the enzyme that catalyzes ...

A: The chemical reaction involved in the conversion of CO2 to HCO3- is, CO2 + H2O <=> H2CO3 <=...

Q: Calculate the pH when 15.0 mL of 0.200 M HBr is mixed with 30.0 mL of 0.400 M CH₃NH₂ (Kb = 4.4 × 10⁻...

A: Given, 15.0 mL of 0.200 M HBr is mixed with 30.0 mL of 0.400 M CH₃NH₂

Q: If the leaving group was changed from fluorine to chlorine, what would be the effect on the rate of ...

A: Click to see the answer

Q: What is the pH of a 125.0 mL of a 0.15 M LiOH solution after 70.0mL of a 0.10 M HClO4 solution of is...

A: Click to see the answer

Q: Please help: A) The activation energy, Ea, for a particular reaction is 13.6 kJ/mol. If the rate con...

A: The expression of Arrhenius equation is shown below: lnK = lnA - EaRT Where; K = rate constant A = A...

Q: What is the strongest interparticle force in each of the following substances?(a) CH3OH:dispersionhy...

A: Interparticle forces are the interactions  that exist amongst the molecules of a given substance(s)....

Q: What is the pH of a 75.0 mL of a 0.1 M NH3 solution (Kb= 1.8 x 10-5) when 100.0 mL of a 0.0.75 M HCl...

A: Hello. There are multiple subparts in the question. The first three subparts have been solved. To re...

Q: The collision between a beta particle and positron produces   nothing- they annihilate each othe...

A: Click to see the answer

Q: Give two examples of natural and synthetic polymers?

A: Polymers are the large chain molecules with repeating subunits.  

Q: Co-53 decays into Fe-53 by   alpha emission   beta emission   positron emission   gamma em...

A: To determine type of decay from Co-53 to Fe-53.

Q: Question Consider the following molecular shapes.  (a) Which has the most electron pairs (both share...

A: Total electron pairs= bond pairs + lone pairs  Molecule (A): Square planar shape Total E.P = 6  (4 b...

Q: Draw the hybridization for the metal centre of the complex below. You need to determine the geometry...

A: Hybridization is the process of mixing up of atomic orbitals to give new orbitals, hybrid orbitals. ...

Q: A 35.0 mL solution of NaOH is neutralized with 31.4 mL of 0.250 M HCl. What is the concentration of ...

A: we will write the chemical equation first HCl (aq) + NaOH (aq) -> NaCl (aq)+ H2O(l) we are given ...

Q: What is the pH of an aqueous solution containing 75.0 mL of a 0.15M HNO2 solution and 45.0 mL of a ....

A:   The pH of buffer solution is determine by Henderson equation.   pH = pKa + log [base]  [acid]     ...

Q: The pH of a 0.0068 M solution of Ca(OH)₂ is?

A: pH + pOH = 14 pOH = -log[OH-]

Q: A flexible vessel contains 14.00 L of gas at a pressure of 1.27 atm. Under the conditions of constan...

A: The volume of the gas when the pressure of the vessel is decreased by a factor of two has to be calc...

Q: 5. Give the structures of the following acids and arrange them in the increasing order of acidity. G...

A: Click to see the answer

Q: Please help with the following. Am stuck. Thank you!! A) A reaction vessel is charged with 0.50 atm ...

A: Hii there, since there are multiple questions posted. We are answering first question. If you need f...

Q: 2ICI(s) ** 12(s) + C12(g). Which of the following changes will increase the total amount of of C12 t...

A: For the given reaction, the concentration of ICl (s) and I2(s) is assumed to be constant as both are...

Q: What volume of a 0.452 M NaOH solution is needed to neutralize 85.0 mL of a 0.176 M solution of H2SO...

A: Click to see the answer

Q: See attached

A: CHEMICAL CHANGE  :- A chemical change as the name suggests, brings a change in the chernical composi...

Q: Consider the astronaut being supplied with He and N2. The density of helium at STP is 0.179g/L and o...

A: Here, we need to calculate the Molar Mass of the gas if 4.40 grams occupies 3.50 L at 41oC

Q: Provide the IUPAC name of this Alkynes

A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want...

Q: Could you explain how to do this with great detail?

A: Firstly identify the longest chain having higher priority functional group. Here the higher priority...

Q: What is the difference with UV single beam vs double beam and how does it affect absorbance?

A: In a single beam spectrophotometer absorbance at some certain fixed wavelength is recorded to known ...

Q: Using the equations H₂ (g) + F₂ (g) → 2 HF (g) ∆H° = -79.2 kJ/mol C (s) + 2 F₂ (g) → CF₄ (g) ∆H° = 1...

A: Click to see the answer

Q: What is the pH of a .020 M weak acid, HA at 25 C? The delta G, HA is -63.7 kJ/mol; the delta G, A is...

A: The given reaction is: HA(aq)⇋H+(aq)+A-(aq) Calculation of ∆G˚ for the reaction: ∆G°=∆GH++∆GA--∆GHA=...

Q: A student measures the mass of a block of brown sugar to be 12.9 g with a volume of 8cm3. what is th...

A: Click to see the answer

Q: What is the name of the direct phase change of liquid to gas?

A: Vaporization is the process of transfer of phase from liquid to gas.

Q: Complete and balance the reaction in acidic solution. equation: ZnS+ NO, Zn2+ +S + NO Incorrect Whic...

A: The balanced equation of redox reaction is shown below.  

Q: What is the standard enthalpy of formation of the decomposition of one mole of liquid sulfuric acid ...

A: Balanced chemical equation for decomposition of Sulfuric acid: 2H2SO4(l) → 2H2O(g) + O2(g) + 2SO2(g)...

Q: 28. Explain why the configuration of a polymer of 2.3-dimethylbutylene is neither isotactic, syndiot...

A: Configuration of a polymer of isobutylene: The three possible configurations for polymers formed fr...

Q: Describe the relationship of enthalpy, work, and internal energy. Calculate the AU for these reactio...

A:  Heat :- Energy is exchanged between the system and the surroundings as heat if they are at differen...

Q: 1)What type of bond do you expect between N and C where the electronegativity of N is 30 and that of...

A: When two non-metal atoms combine to form a bond, a covalent bond is formed which is formed by the sh...