Calculate the pH of a buffer composed of 25 mM NaH₂PO4 (pKa = 7.21), and 20 mM Na₂HPO4 (pKa = 12.3).

Q: A chemist fills a reaction vessel with 2.29 atm methanol (CH3OH) gas, 4.70 atm oxygen (O₂) gas, 3.54…

A: ∆G is the change in free energy. Keq is the equilibrium constant (remember Keq =…

Q: 10. 0.94 The base protonation constant K of ammonia (NH3) is 1.8 × Calculate the pH of a 0.94 M…

A: Given- Concentration of Ammonia= 0.94 M Kbof Ammonia= 1.8×10-5 pH of solution = ? To find

Q: 8. Quantum-mechanical oscillator. Describe Figure 2.: (a) Describe what is plotted on the x-axis and…

A: The system shown above is simple harmonic oscillator, here we calculate the quantised energy by…

Q: Consider the molecule epinephrine a. Draw the structural formula. Show all atoms, bonds and lone…

A: To solve this problem we have to draw the structure of the given compound .

Q: What is the calculated value of the cell potential at 298K for an electrochemical cell with the…

A:

Q: Match a structure from the list below to the following IR spectra. Place the letter of the structure…

A: Infrared spectroscopy deals with the study of interaction of infrared light in electromagnetic…

Q: The alkene shown below is treated sequentially with ozone (03) and zinc/acetic acid. Draw structural…

A: Alkene reacts with ozone followed by reaction zinc/acetic acid result of cleavage of C=C to give…

Q: At a certain temperature the rate of this reaction is second order in CICH₂CH₂Cl with a rate…

A:

Q: [Co²+] = = 1.17 M and [Fe²+] = 0.00935 M, is −42.9 kJ: AG = -42.9 kJ The free energy change for the…

A: As per the guidelines, I am solving the first question. Kindly repost the second question. The given…

Q: Radioactive decay  I.Occurs in unstable isotopes II. is not spontaneous  III. releases energy

A: Answer of the given question is shown below:

Q: 5. If 0.850 L of a 5.00-M solution of copper nitrate, Cu(NO3)2, is diluted to a volume of 1.80 L by…

A:

Q: What mass of chlorine gas, in grams, is needed to react completely with 16.3 g of aluminum?…

A: A balanced chemical equation contain equal number of atoms of each elements on both sides of the…

Q: 30 70 60 50 40 30 20 10 0 0 1 2 3 4 Time (Days) 6 7 8 9 How long is the half-life of the isotope…

A:

Q: 3. Circle any conjugated portions in the molecules below. If there is no conjugation, specify. a.…

A: The mixing or overlapping of p-orbitals of one atom with another p-orbital in a neighbouring sigma…

Q: 6. Label the blank phase diagram with the three phases, the six phase changes, and the two points.…

A: In one component systems like water three phases solid , liquid and gas phase are possible.

Q: Drawing on what you know about the stereochemistry of alkene addition reactions, write the mechanism…

A: The reaction between 2-Butyne and Br2 (one equivalent) is an example of electrophilic addition…

Q: Chlorine monofluoride can react with fluorine to form chlorine trifluoride: Use the reactions here…

A: Equation (i) -> ClF(g) + F2(g) ---> ClF3(g)

Q: For the following chemical reaction,      CO (g)   +   H2O (g)      CO2 (g)   +   H2 (g)     Kc =…

A: The equilibrium constant, Kc, is the ratio of the equilibrium concentrations of products over the…

Q: Which of the following is a good buffer system? a. solution with 0,10M NaCl and 0.10MHC/ b, solution…

A: It is based on the concept of buffer.  Here we are required to find the solution which can form good…

Q: Draw a structure for the expected product of the reaction below. HO₂C. OH cat p-TsOH heat

A:

Q: A certain liquid X has a normal freezing point of -1.20 °C and a freezing point depression constant…

A:

Q: Question 25 If 30.2 mL of 1.56 M iron (II) nitrate solution reacts completely with an aqueous…

A: In this question, we will determine the mass of the FeCO3 in grams unit because FeCO3 is…

Q: ): A compound had a molar absorptivity of 2.93 x 10' L.cm mol¹. What concentration of the compound…

A: It is an application of Lambert Beer law  Here we are required to find the concentration of the…

Q: What is the pH of a solution of 0.100M HCN mixed with 0.150M NaCN?  Assume the total volume is…

A: Given -> Molarity of HCN = 0.100 M Molarity of NaCN = 0.150 M Total volume= 1.00 L

Q: calculate cell potential and standard Free energy Co(s) + F2(g) → (8²* (aq) + 2F (aq) 2+ Answer: E'…

A:

Q: 0.785M solution of the weak acid, hypoiodous acid, HOI, has a Ka of 2.32x10-11. What is the Ka…

A:

Q: Calculating the composition of a buffer of a given pH A chemistry graduate student is given 300. mL…

A:

Q: Indicate which spectral technique, NMR, IR, UV or MS, would most readily allow differentiation…

A:

Q: 61. Consider the reaction between calcium oxide and carbon dioxide: CaO(s) + CO2(g) →→→→ CaCO3(s) A…

A:

Q: The acid dissociation K of propionic acid (C₂H₂CO₂H) is 1.3 × 105. Calculate the pH of a 2.5 x 10 M…

A:

Q: Calorimetry In this experiment, heats A student mixes 51.0 mL of 1.890 M HCl(aq) and 47.0 mL of…

A: Given that 51.0 mL of HCl(aq) and 47.0 mL of NaOH(aq) are mixed. Given that the change in…

Q: Calculate the Ecell for the system Cu²+ + Zn Cu + Zn²+

A:

Q: 7. Calculate the molarity of 5.03 g of CH4 in 257.3 mL of solution.

A: Molality is defined as number of mole of solute divide by volume of solution in liter

Q: A standard galvanic cell is constructed with Fe³+ | Fe2+ and Cr³+ | Cr half cell compartments…

A: As per the guidelines, I am solving the first question. Kindly repost the second question. In a…

Q: 1. Name each of the ionic compounds below and provide the equation representing its complete…

A:

Q: Imagine an alternate universe where the value of the Planck constant is 6.62607 J-s. In that…

A: de-Broglie proposed that matter such as radiation acts as both particle and wave. According to…

Q: A certain reaction is second order in N₂ and first order in H₂. Use this information to complete the…

A:

Q: Consider the following concentration-time data for the decomposition reaction AB→A+B. Time (min) 0…

A:

Q: 6. Write a balanced molecular equation for: Dal suo Solid calcium carbonate is heated and decomposes…

A: The balanced molecular  equation for decomposition of calcium carbonate:  CaCO3(s) ==> CaO(s) +…

Q: This is a Dry Lab since we cannot meet on Campus. After calibrating a pH meter you would have…

A: Given , Different NaOH solution of varying concentration .

Q: ОН ОН Draw the molecule on the canvas by choosing buttons from the Tools (for bonds and charges),…

A: Pinacol-pinacolone rearrangement: 1,2-diols in the presence of acid gives a carbocation, then…

Q: 5. Cobalt-62 has a half-life of 1.5 minutes. What percent of the initial sample will remain after 12…

A:

Q: For the SN 2 reaction, draw the major organic product and select the correct (R) or (S) designation…

A:

Q: E n 0 Р CH₂OH HO OH OH HCI HBr HI HCI

A: These type of reactions are called substitution reactions. Let us discuss the mechanism of each…

Q: What is the value of the equilibrium constant, K, at 298 K for the following reaction? Zn2+ (aq) +…

A:

Q: QUESTION 10 Acid-Base Titration Here oxalic acid was used to standardize a dilute solution of sodium…

A: Given -> Mole of oxalic acid = 1.38 × 10-3 mole  Volume of acid = 25.0 ml Volume of base NaOH =…

Q: Which of these triglycerides would you expect to find in higher amounts in oil? In fats? Justify…

A: Given Triglycerides are A and B

Q: ▾ Part B 12C+H³C+? Express your answer as a particle.

A: Two questions based on nuclear reaction. Incomplete nuclear reactions are prescribed whose products…

Q: Molarity? # 3 As OH- Molarity increases, what happens to the H+

A: Using the relation between OH- molarity and H+ molarity , we can determine the affect.

Q: What is the calculated value of the cell potential at 298K for an electrochemical cell with the…

A: When the calculated cell potential is positive , then the reaction undergoing in the cell is…