What mass in grams of potassium fluoride is needed to make 150.0 mL of a 0.450 M hydrofluoric acid/fluoride buffer with a pH of 4.25 from 1.25 M HF and solid potassium fluoride?  The Ka for HF is 6.8×10–4.

Q: You are investigating the properties of several unknown gas samples. Based on the information…

A: Answer: This question is based on density form of ideal gas equation which is shown below:…

Q: The experimental data in the table was collected during a freezing point depression study where BHT…

A: Mass of BHT, W1 = 8.526 g Mass of unknown, w2 = 1.316 g Freezing point of pure BHT, To = 74.60 °C…

Q: a Classify the following alcohol as primary, secondary, or tertiary. primary secondary tertiary OH

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Q: Idenitfy the fragments of 1-chlorohexane in the mass spectrum.

A: To identify the fragments of 1-chlorohexane in the mass spectrum, we first need to understand how…

Q: How to quickly determine paramagnetism and diamagnetism,  How to approach a problem during an exam…

A: Paramagnetic substance have atleast one unpaired electron whereas diamagnetic substance have no…

Q: An analytical chemist is titrating 78.3 mL of a 0.7900M solution of aniline (C6H5NH₂) with a 0.2500M…

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Q: constant of a system, K, can be tandard free energy change, AG, wing equation: AG=-RT In K pecified…

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Q: A 20.330 g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is…

A: Titration is a volumetric analysis in which the unknown concentration of the sample is measured by…

Q: 16 eBook Print References 1 1 Draw the structure of the major organic product isolated from the…

A: According to question we have to draw the structure the major product when 1-hexyne react with 2…

Q: Draw (on paper) Lewis structures for ammonium ion and the nitrate ion. How many equivalent Lewis…

A: Octet Rule: Every atom has a tendency to have eight electrons in its valence shell. Lewis Dot…

Q: 5. a. Propose a method for how you would resolve (±)-2-chloropropanoic acid [(±)-RCOOH] using…

A: a) A racemic mixture is a 50:50 mixture of two enantiomers. Here 2- chloropropanoic acid has D and L…

Q: What is the reaction mechanism when 1-chloro-1,2- dimethylcyclohexane reacts with sodium ethoxide,…

A: Given that, the reaction between 1-chloro-1,2-dimethylcyclohexane with sodium ethoxide. We have to…

Q: Can you draw 3 resonance structures and choose which is the most significant

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Q: Americium-241 is widely used in smoke detectors. The radiation released by this element ionizes…

A: Given,  Mass of Am-241 = 5.00 g.  Half life of Am-241 = 433 years.  Here, we have to calculate…

Q: Biphenyl, C₁2H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C.H. At 25 °C,…

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Q: Complete the following equation to show the conjugate acid and the conjugate base formed by proton…

A: Conjugate acid formed when an acid donate proton to a base and it has one more hydrogen atom and +ve…

Q: 8.27 Classify each of the following as either a Brønsted-Lowry acid, base, or as a. HOCOOH…

A: Answer: Any specie that accepts H+ ion in its solution is called as Bronsted-Lowry base and Any…

Q: For a certain chemical reaction, the equilibrium constant K = 6.3 x 10 at 20.0 °C. Calculate the…

A: Relation between free energy change and equilibrium constant is ∆G0 = - RT ln K Where T =…

Q: What is the pH when the [OH-] = 7.33 x 10-9 M at 25 oC?

A: The formula for the pOH calculation is : => pOH = -log[OH-]

Q: What is the IUPAC name for the following compound?

A: IUPAC nomenclature used for the systematic naming of the organic molecules.According to IUPAC…

Q: What is the [H3O+] in a solution with a pH of 5.98?

A: Based on the values given, pH=5.98 [H3O+]=?

Q: Consider the reaction below: 4 NH3)+502) 4 NO(g) + 6 H₂O(g) AH° -906 kJ How many moles of ammonia…

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Q: LDA (base) CH31

A: The mechanism of the given reaction involves two steps,  1. Abstraction of alpha-hydrogen by LDA 2.…

Q: Propose an efficient synthesis for the following transformation: The transformation above can be…

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Q: An analytical chemist is titrating 139.4 mL of a 0.7600M solution of isopropylamine ((CH3)₂CHNH₂)…

A: Volume of isopropyl amine solution=  139.4 mL  Molarity of isopropyl amine solution= 0.7600M…

Q: Which of the following compounds will be more soluble in acidic solution than in pure water? A)…

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Q: Which of the following gas samples will have the greatest average velocity (i.e. be fastest),…

A: Answer: Formula to calculate average speed of the gas is shown below: Vavg=8RTπM   Here: R=universal…

Q: SbF4- has 34 valence electrons. How many total electrons are in the Sb expanded outer shell?

A: Electronic configuration refers to the arrangement of electrons in the orbitals of an atom or a…

Q: 2. Construct a Lewis diagram for ethanol, C₂H5OH, indicating the partially positive and partially…

A: Lewis Structure is a very  representation of the valence shell electrons in a molecule. It is used…

Q: mol L A chemist must prepare 0.975 L of 1.00 M aqueous nickel(II) chloride (NiCl₂) working solution.…

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Q: app.101edu.co Draw the major product of this reaction. Ignore inorganic byproducts. Assume that the…

A: Organic reactions are those in which organic reactant react to form organic product. In the given…

Q: Temperature A phase change graph is shown below. Assume that pressure is constant. Identify what…

A: Answer: Given energy profile is the phase transition energy profile of the substance and we have to…

Q: m) O || CH3-C - H + CH3CHCH₂OH CH3 11 OH CH3-C-O-CH₂CHCH3 H T CH3

A: The question is based on the concept of organic synthesis.  we need to synthesize the product using…

Q: We use a beaker to measure liquid volumes, instead of a graduate cylinder  true or false

A: Definition - Beaker is a cylindrical shaped container having pouring tip. Uses- Beaker is mostly…

Q: For the reaction 2 A (g) → B (g), Kp = 0.00733 at 298 K. When AG = 8.35 kJ/mol, what is the partial…

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Q: O What anomer of D-glucose is depicted in Question 5 above? alpha (X) a (B) beta

A: Given structure is in form of glucopyranose form . In this form two structure are observed one is…

Q: Design a synthesis of 4-methyl-2-pentyne from 3-methyl-1-butene. H3C- Part 1 out of 8 Choose the…

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Q: given the following ionic radii/nm; Li+ = 0.078, F- = 0.731, Rb+ = 0.149, Br- = 0.149. What type of…

A: Given that radius of ions are  Li+=.078nm F-=0.731nm Br -=0.149nm Rb+=0.149nm We have to find…

Q: Draw the furanose a-anomer Haworth projection from the Fischer projection shown below. H. c=0 H-OH…

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Q: Which of the following are conjugate acid/base pairs? Select all that apply. Group of answer choices…

A: A conjugate acid-base pair consists of two molecules or ions that are related to each other by the…

Q: (10/1000000)x5x100 =0.005  why am I getting different answ

A: ppm (parts per million) is defined as the parts of solute present in 106 parts of solution.  It can…

Q: m of a utions are te. 8 /transcript AgNO3(aq) and NaF (aq) Express your answer as a chemical…

A: Net ionic equation : It is an equation that represents only the molecules or ions that are actively…

Q: 1) O 11 CH₂-C-H [R] 1! CH₂CH₂=-&-chicks! CH3CH₂-C-CH₂CH3+2CH3CH₂OH 11 CH3CH₂OH OCH₂CH3 CH3CH2-C-…

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Q: Draw all of the structures of cysteine as the pH increases from low to high, then sketch a titration…

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Q: The experiment is the reduction of a nitro group to an amine I've attached my work, but I'm not sure…

A: 200 mg of m-nitroacetophenone 400 mg of granular tin 4mL of 6M hydrochloric acid 30% sodium…

Q: O₂(g) + NO(g) →→→ O₂(g) + NO₂ ate law for this reaction is rate of reaction = k[03][NO] that k =…

A: The rate is given as Rate = K×[O3][NO] initially, we are given concentration of: [O3] = 3.22 × 10-6…

Q: Predict the type of bond that would be formed between each of the following pairs of atom Atoms N…

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Q: An analytical chemist is titrating 102.0 mL of a 0.8400M solution of cyanic acid (HCNO) with a…

A: pka of cyanic acid = 3.46

Q: Consider the following experimental boiling points: CH4: -162°C C3H8: -42°C C6H14: 69°C C9H20: 151°C…

A: The inter molecular forces present in alkanes are London dispersion forces. Boiling points of…

Q: Draw the Fischer projection of L-mannose. Drawing H H H TH H H H H +

A: The molecular formula of aldohexose, mannose is C6H12O6.

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.