A titration of 50.0 mL 0.010 M propanoic acid with 0.010 M KOH was carried out. Indicate the pH at the equivalence point. Data: pKa(propanoic acid) = 4.87
Q: If 5 atomic orbitals overlap, how many molecular orbitals form?
A: Given : 5 atomic orbitals overlap
Q: What is the formal charge on the oxygen in CIOF4* if the structure contains no double bonds? -3 -2…
A:
Q: Match the reagents to the reaction (place letter on reaction arrow) Only letters C. & D. Are left to…
A: In the given reaction the hydroxy group is substituted by the chloride ion from the back side…
Q: Show the reaction mechanism of methylbenzene and an electrophile. Please include formation of the…
A: Given methyl benzene
Q: Accurately and precisely record the volume reading for a liquid in a 100-ml graduated cylinder in…
A: The given cylinder is a 100 mL graduated cylinder with least count of 1 mL There are markings for…
Q: 4. COOH COOH
A: The given reaction is Diels-Alder reaction.this is also called (4+2) cycloaddition reaction.
Q: draw the lewis structures for benzophenone and 4-hydroxybenzoic acid
A: Given : name of compounds
Q: The degree of dissociation of a 0.50 M aqueous solution of 2-hydroxybutyric acid is 2.12%. What is…
A:
Q: 81) The numbers of radial nodes, planar angular nodes and non-planar angular nodes in 3d₂ and 3px…
A: A radial node is a point in space where the probability of finding an electron in an atom is zero.
Q: What is the atom in the image
A: The structure of atom is provided with nucleus and the electrons on the orbits. Counting of…
Q: Draw structural formulas for the products of the reaction shown below. CH₂CH₂-O-CHCH3 + HBr CH3
A: Given : structure of reactant
Q: C. Write the electron configuration of the following atoms and identify what Family and period do…
A: The question is based on the periodic table and electronic configuration. The electron configuration…
Q: For the image attached make a graph of the average volume and density vs year. Be sure to label the…
A: The given data in ascending years is expressed as: Minting year Average mass (g) Average volume…
Q: Express the rate of the reaction 2NO(g) + O₂(g) → 2NO₂ (g) a. in terms of A[NO₂]. rate = b. in terms…
A: Given -> 2NO(g) + O2(g) ---> 2NO2(g)
Q: In the year 2005, a picture supposedly painted by a famous artist some time after 1475 but before…
A: This is a question based on radiocarbon dating. Here we will use first order reaction rate to…
Q: An aqueous solution containing 36.6 g of an unknown molecular (non-electrolyte) compound in 148.7 g…
A:
Q: Predict the major product and provide a mechanism for the following: a.…
A: Organic reaction mechanism is the method of analysis in which we actually know how the actual…
Q: The following two structures would be considered isomers. Select one: True False Use the following…
A:
Q: 1. نه 3. A
A: These given reactions are Diels-Alder reaction.
Q: 2a) The molecule ethene (or ethylene), which has the molecular formula C₂H4, contains two carbon…
A: In the lewis structure of ethene, there is a double bond between carbon atoms, four C-H bonds. There…
Q: How many moles of LIAIH, are needed to make 1 mole of 4 H3C from H3C CH3 OH CH3
A: The main function of lithium aluminum hydride (LiAlH4) is to reduce carbonyl compounds, such as…
Q: The following initial rate data are for the reaction of UO₂+ with hydrogen ion in aqueous solution:…
A:
Q: Given the Ksp = 1.4 x 10-13, what is the solubility of CoCO3 (i.e., what is the [Co2+]…
A:
Q: What is the relationship between the parent structure on the left and the structure on the right? α…
A: Compounds with the same molecular formula but different structures are known as isomers. Structural…
Q: c) d) 6. b) a) Which is likely to be on top, the aqueous or the organic layer*? "hint: which is more…
A:
Q: You have a sample of 121.5 g of C₂H6. How many moles of C₂H6 are in the sample?
A:
Q: Iodine and bromine react to give iodine monobromide, IBr. I2(g) + Br2(g) → 21Br(g) What is the…
A:
Q: Aldehydes and ketones react with one molecule of an alcohol to form compounds called hemiacetals, in…
A:
Q: For the image attached make a graph of the average volume and density vs year. Be sure to label the…
A: To plot the graph of the average volume and density vs year . Also, to label the axis
Q: Assume the half-life of a substance is 29 days and the initial amount is 139.399999999998 grams. (a)…
A: Given data is The half life of the substance = 29 days Initial amount of the substance =…
Q: 6. Consider a fertilized hen egg in an incubator in constant temperature and pressure environment.…
A: In thermodynamics, entropy is a measure of the amount of thermal energy in a system that is…
Q: Estimate the mixing ratio of NO in the following condition: NOx = 30 ppb, 03 100 ppb, [M] = 2.5×1019…
A:
Q: For a gaseous reaction, standard conditions are 298 K and a partial pressure of 1 atm for all…
A: According to the question, The standard Gibbs free energy is given by = ∆G° =-69.0 kJ/mol The…
Q: Consider the heating curve provided for 1.00 mole of a substance that begins as a solid at -14.8 °C…
A: The specific heat capacity of the liquid is 97.25 J/g.oC, which states that 97.25 J of heat energy…
Q: What is the conversion factor for the relationship between millimeters and centimeters
A: What is the conversion factor for the relationship between millimeters and centimeters
Q: Write the reaction for the formation of 1,4-di-t-butyl-2,5-dimethoxybenzene.
A: Synthesis of 1, 4-Di-t-butyl-2, 5-dimethoxybenzene in terms of Friedel-Crafts Alkylation
Q: Explain what silica-oxygen tetrahedra are and the different ways they can bond. Individual…
A: Silica-oxygen tetrahedra are a fundamental building block of silicate minerals, which make up over…
Q: The first-order decay of radon has a half-life of 91.75 hours. How many grams of radon remain after…
A:
Q: At 500 C, cyclopropane (CaHe) reamanges to propene (CH₂-CH=CH₂). The reaction is first order, and…
A: Given, The rate constant of the reaction (k) = 6.7×10-4 S-1 The initial concentration of C3H6 =…
Q: CID NOMENCLATURE Give the formulas of the following compounds: 1. hydrochloric acid 2. chromic acid…
A: Since, Common name are those name which is generally used to identify the chemical in the…
Q: aqueous layer OH (acid) "HCI layer" + dilute NaOH (aq) solution + NaCl (aq) (neutral) (base) +…
A: In aqueous solution, ionic compounds are mostly soluble where in organic layer organic compounds are…
Q: 12 - -2-2-2-2-2--2, Br 12
A: This question is related to IUPAC nomenclature. IUPAC stands for International union of pure and…
Q: Ideally, the van 't Hoff factor should be equal to the number of ions that make up a compound. In…
A: Van't Hoff factor : It is defined as the ratio of the concentration of particles formed when a…
Q: Freezing point depression can be used to experimentally determine the van 't Hoff factor of a solute…
A: “Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…
Q: 1.38. Calculate the Boyle temperatures for carbon dioxide, oxygen, and nitrogen using the van der…
A: Boyle temperature is that particular temperature at which real gas tends to behave like ideal gas.…
Q: alcohol. A carbocation intermediate is central to which of these reaction types? (circle) E1 E2…
A: In bimolecular reactions the attack of nucleophiles (in case of SN2) or base (in case of E2) and…
Q: 1. 2. 3. A
A: Secondary orbital overlap is main reason to get endo product. In these three reaction, dienophiles…
Q: Consider the following system at equilibrium where AHⓇ = 2NOBr(g) → 2NO(g) + Br₂ (9) When 0.36 moles…
A: Reverse reaction leads to decrease in concentration of product molecules. when Qc > Kc then…
Q: The Henry's law constant at 25.0 °C for 2 in water is 0.0013 M/atm. What is the solubility of O2, in…
A: Given that the Henry's law constant for O2 is 0.0013 M/atm. Partial pressure of O2 is 1.8 atm.
Q: he physician has ordered 25mEq of potassium chloride in 1,000 mL of D5W IV. Available: KCL 20…
A: The required amount of KCl = 25 mEq Required volume of solution D5W = 1000 mL The available KCl has…
Step by step
Solved in 4 steps
- Determine the pH at the equivalence (stoichiometric) point in the titration of 38.83 mL of 0.262 M (CH3)2NH(aq) with 0.111 M HCl(aq). The Kb of (CH3)2NH is 5.4 x 10-4.Define and explain the significance of the equivalence point of a titration. Identify the role of the indicator in this context.Determine the pH at the equivalence (stoichiometric) point in the titration of 44.27 mL of 0.138 M morphine(aq) with 0.271 M HCl(aq). The Kb of morphine is 1.6 x 10-6.
- Explain the difference between 'stoichiometric (equivalence) point' and 'end point' in the context of a titration.Use the following experimental titration data to calculate the concentration of the acid being analysed. Observations: The initial solution of acetic acid (HC2H3O2) is clear and colourless. A few drops of phenolphthalein indicator are added to each sample. A dilute solution of sodium hydroxide (concentration 2.50 x 10-4 mol/L) is used as the titrant. As the mixture reaches the endpoint, flashes of pink colour are seen and the titrant is added drop by drop. The endpoint is reached when one drop of titrant turns the mixture a pale pink colour that does not fade.The primary buffer in the blood is carbonate-bicarbonate buffer. If the pKa is 6.1 and the pH is set at 7.4, what is the ratio of the concentrations of carbonate to bicarbonate. Describe the buffering capacity of this buffer.
- You have performed an iodimetric titration using a commercial vitamin C tablet. Based on the following information below, calculate the %(w/w) of vitamin C(MM=176.16 g/mol) in the tablet: Mass of tablet dissolved in 250.0 mL: 5.422 g Aliquot volume of sample titrated: 25.00 mL Concentration of KIO3: 0.023 M Final burrette volume: 41.31 mL Initial burrette volume: 8.89 mL Blank volume: 0.14 mLIn developing a method for the determination of formic acid by neutralization volumetry, an analyst calculated the pH as a function of the addition of NaOH for the titration of 30.00 mL of 0.1280 mol/L formic acid with standardized NaOH with concentration of 0.1570 mol/L. With respect to this titration curve, determine the pH of the solution after adding the following volumes of NaOH: 0.00 mL; 10.00 ml; 25 mL of titrant and at the equivalence point. Data: Ka=1.70x10-4. Present the results with two decimal places and show your calculations.You are given a 27 % (w/v) solution of psicose. Molar mass: psicose (C6H12O6) = 180.156 g/mol. You dissolve 6.31 g of potassium formate in 250 mL of 0.25 M formic acid (HCOOH). This solution was then made up to a total volume of 500 mL with distilled water. Potassium formate (KHCO2): molar mass = 84.12 g/mol Calculate the pH of this solution given the pKa of formic acid = 3.77.
- Chitinase is a protein that breaks down chitin, a primary component of the cell wall in fungi, scales in fish and exoskeletons of arthropods. The activity of chitinase extracted from a plant was shown to be optimum at pH 5. You were tasked to prepare 300 mL of 150 mM buffer solution for further analysis of the extracted chitinase. REAGENTS Ka 2.5M Acetic acid Solid NaOAc•3H2O [136.08g/mol] 1.76 x 10-5 2.5M NH3 Solid NH4Cl [53.49g/mol] 5.6 x 10-10 2.5M Lactic acid Solid sodium lactate [112.06g/mol] 4.0 x 10-5 5 M HCl 5M NaOH What are the moles of the (1) acid and (2) base components, given the following reagents? What is the mass/volume of the components needed to prepare the buffer solution?Using the Henderson-Hasselbalch equation, demonstrate that the pH at 50% neutralisation for a monoprotic acid/base titration is equal to the pKa for the acid.ACID-BASE EQUILIBRIA AND SALT EQUILIBRIA (COMMON-ION EFFECT, BUFFER AND SOLUBILITY EQUILIBRIA) A mixture of 0.15 M acetic acid and 0.34 sodium acetate is given. Calculate the pH of the medium if the pKa of the acetic acid is 4. 87.