To study the effects of a weakly acidic medium on the rate of corrosion of a metal alloy, a student prepared a buffer solution containing both 0.123 M NaC2H3O2 and 0.087 M HC2H3O2. Calculate the pH of the buffer using the Kb for C₂H3O2. Be sure to write the chemical equation for the equilibrium as the reaction of C₂H3O2 with water. Then use the chemical equation as a guide in setting up the equilibrium expression for Kb. For acetic acid, HC₂H3O2, K₂ = 1.8 x 10-5. pH =

Q: 5. Draw a heating curve (including phase changes) for water if liquid water starting at 4.0 °C and…

A: #5:  #Heating curve: The heating curve is drawn by taking the Temperature(oC) on Y-axis and heat…

Q: Match each step with the atomic spectroscopy that it occurs in. Each answer may be used once, more…

A: AES (Atomic Emission Spectroscopy)- the method of chemical analysis which is used to determine the…

Q: It was found that 27.53 mL of HNO3 solution are needed to react completely with 20.0 mL of 0.00026 M…

A: Vomume of HNO3 (V1) = 27.53 mL Vomume of LiOH (V2) = 20.00 mL Molarity of LION (M2) = 0.00026 M…

Q: Titanium (Φ = 6.94 ×× 10–19 J) and silicon (Φ = 7.77 ×× 10–19 J) surfaces are irradiated with UV…

A: Titanium (Φ = 6.94 ×× 10–19 J)  Silicon (Φ = 7.77 ×× 10–19 J) λ = 243 nm = 243 x 10-9 m

Q: The molecule shown here is classified as what type of organic compound? H3C- -CH₂ CH3 x H3C CH₂-CH3…

A: The compounds of carbon and hydrogen are known as a hydrocarbon. Hydrocarbons can be classified into…

Q: Q.) What is mole mass) aqueous s A. 0.15 B. 0.50 C. 0.75 D. 0.02 E. 1.00

A:

Q: (Mg=24.31g/mol; O=16.00g/mol) The equation for the reaction of Mg and O₂ is Mg(s) + O2(g) → MgO(s).…

A: The given balanced chemical equation is  Mg (s) + O2 (g) →MgO (s) The mass of magnesium required…

Q: 1) 11) Match this condensed formula, CH₂(CH₂)CO(CH₂)₂CH₂, with the correct skeletal drawing. III)…

A:

Q: Draw the electron pushing mechanism

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Q: Balance the following redox reaction: MnO4 + HCN + →Mn²+ + ICN

A: A redox reaction is balanced by balancing the mass and charge. Hence the number of atoms of all the…

Q: the equiliberium constant for the gas phase reaction see image with 2SO2 is Kwq = 2.80 x 10^-4 at…

A:

Q: We titrate 20 mL of HCLO 0,000278 mol/L with KOH 0,00035 mol/L. What is the pH of the solution…

A: Given :-   Volume of HClO = 20.0 ml = 0.020L  Molarity of HClO = 0.000278 mol/L = 0.000278 M…

Q: Curved arrows are used to illustrate the flow of electrons. Follow the curved arrows and draw the…

A: Here we are required to find the intermediate of the reaction.

Q: Which of the following statements are true for batteries? Select all that apply. A. Lithium…

A: To state if the given statements are true or false:

Q: λ = A photon has an energy of 2.59 x 10-19 J. What is the wavelength of the photon?

A:

Q: Given the following data, RuO4 (aq) + e RuO4(s) + e RuO² (aq) RuO (aq) calculate AG for the…

A: we have to calculate the Gibbs free energy change for the given reaction

Q: How are the electrodes cleaned? with HCI, dip the electrode in and swirl around until the solution…

A: The question is about cleaning an electrod.

Q: Determine the minimum voltage that must be applied to a cell containing molten PbCl₂ in order for…

A: Electrolytic cell is just reverse of galvanic cell . Here electrical energy changes into chemical…

Q: Problem 2 answers in units of bar for part b, provide your equilibrium osmotic pressure The osmotic…

A: Relation between activity coefficient and osmotic coefficient

Q: Place the steps in order from first to last for confirming the presence of mercury(I) ions in a…

A: The qualitative analysis of cations is based on the precipitation of the inorganic cations with…

Q: Radio wave radiation falls in the wavelength region of 10.0 to 1.00×103 meters. What is the…

A: Frequency is inversely proportional to wavelength

Q: Acrylonitrile (C3H3N) is the starting material for many synthetic carpets and fabrics. It is…

A: Given: Mass of C3H6 = 20.0 g Mass of O2 = 15.0g Mass of NH3 = 10.0 g Molar mass of C3H6 = 42 g/mol…

Q: Aniline, C6H5NH₂, is a precursor for many dyes used to color fabrics, known as aniline dyes. Aniline…

A: Given- Kb of Aniline=3.9×10-10 Concentration of solution = 0.35mol pOH=?

Q: Question 2 Briefly explain how the antioxidant activities of tocochromanol natural products can be…

A: Vitamin E consists of 4 tocotrienols (α,β,γ,δ) and 4 tocopherols. Tocotrienol are found in palm oil,…

Q: [Review Topics] [References] Use the References to access important values if needed for this…

A:

Q: A101.6gram sample of an unknown metal at83.0°C was mixed with318.0grams of 20.1°C water in a…

A: Mass of metal = 101.6 g

Q: (C=12.01g/mol; H=1.008g/mol; S=32.07g/mol; O=16.00g/mol) Black smokers are found in the depths of…

A: 2CH3SH + CO -----> CH3COSCH3 + H2S Mass of CH3SH = 18.21 g

Q: Write the Molar The Mass?es? 2 2-Chloropropanedioic acid (chloromalonic acid) (±)-2-Hydroxy-2-pheny-…

A: To write the molar mass of the above  given compounds, first we have to draw the structure of the…

Q: What effect will increasing the temperature have on the system? C3H8(g) +5O₂(g) ⇒ 3CO₂(g) + 4H₂O(1)…

A: Given: Reaction is  C3H8(g) + 5 O2(g) ⇌ 3 CO2(g) + 4 H2O(l)      ΔH° = -2220 kJ  We have to find the…

Q: In the given question we have to calculate the following value with correct significant figure.  23…

A:

Q: What is the molarity of a KMnO4 solution if the endpoint was reached after pouring 20.55 mL of KMnO4…

A:

Q: The compound shown here is classified as what type of organic compound? 010 i HạC-CH,—C—O—CH2-CH3 A)…

A:

Q: 3. Benzylic groups undergo both SN1 and SN2 reactions. Below are two benzyl chlorides; one favors…

A:

Q: Treating a primary amide with thionyl chloride (SOCI2) is another way of synthesizing a nitrile.…

A: The mechanism of given reaction can be explained as:  The amide group reacts with SOCl2 forming an…

Q: 5. Which type of spectroscopy (IR, ¹H NMR, and/or 13C NMR) would be good to distinguish between…

A: These two compounds can be distinguished by number and position of signals in 1H and 13C NMR spectra…

Q: You obtain an A280 of 5.32 for your sample of crystallin. Knowing that the extinction coefficient…

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Q: How much solute is required to prepare each of the following solutions? (a) grams of C6H12O6 for…

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Q: A 0.250 mol nitrogen initially at 50 °C with a volume of 8.00 L is allowed to expand reversibly and…

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Q: The heat of fusion of ice is 79.7 cal/g. The densities of ice and water at 0 °C are 0.917 and 1.000…

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Q: A 0.036 M solution of a weak base is 0.019% ionized. What is the pH of the solution? pH= i What is…

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Q: could someone label each of these for me as either methyl, 1°, 2° or 3°? Thanks

A:

Q: Aluminum reacts with Cl₂ to form AICI3. If you have 0.712 mol of Al, what amount (mol) of Cl₂ is…

A: The unbalanced chemical equation is: Al + Cl2 → AlCl3  Amount of Al initially taken = 0.712 mol…

Q: Sulfur dioxide is a colorless gas with a strong odor that is produced when fuels containing sulfur…

A: Equilibrium concentration  Kc Equilibrium concentration

Q: 1H 11 10 2H 2h 3H 3 An IR spectrum, a 13C NMR spectrum, and a ¹H NMR spectrum were obtained for an…

A: We have give the structure of the unknown molecule from the given proton and carbon NMR spectrum and…

Q: 1 2 Compound Name Copper (UD) Carbonate Compound Formu нег

A:

Q: Provide the correct IUPAC name for the skeletal (line-bond) structure shown here. ty

A: Here we are required to provide the IUPAC name of the compound

Q: (Na2SO4=142.05g/mol; Na2S-78.05g/mol, C=12.01 g/mol; CO=28.01g/mol) Sodium sulfide, Na₂S, is used in…

A: A limiting reagent is the one which finishes first in a reaction. The whole reaction depends on the…

Q: A 0.2021 g sample of an organic compound was burned in a stream of oxygen and the CO2 produced was…

A: Given: Mass of organic sample = 0.2021 g Mass of BaCO3 = 0.5995 g Molar mass of BaCO3 = 197.35 g/mol

Q: A 23.3 ml sample of vinegar (dilute acetic acid, CH3COOH) is titrated and found to react with 85.2…

A: Here we are required to find the Molarity of acetic acid solution.

Q: A 1.00 mol sample of water vapour is enclosed in a rigid container equipped with a 9.97 Ω electric…

A:

Electrolysis

Electrolysis is defined as the process of breaking down ionic compounds into their constituent elements by passing a direct electric current through the compound in a fluid state. The cathode reduces cations, while the anode oxidizes anions. An electrolyte, electrodes, and some form of external power source are the main components required for conducting electrolysis. A partition, such as an ion-exchange membrane or a salt bridge, may also be used, but this is optional. These are primarily used to prevent the products from diffusing near the opposing electrode.