Given that carbonic acid, H₂CO3, has a pka1 = 6.37 and a pka2 = 10.33, answer the following. (a) If you wanted to make a pH 7 buffer solution starting with NaHCO3(aq), would you add 0.10 M HCl or 0.10 M NaOH? 0.10 M HCI 0.10 M NaOH (b) If you began with 7.0 mL of 0.17 M NaHCO3, how many mL of your choice from (a) would you need to add to get a pH 7 buffer? 3.94 X mL
Q: Decide whether the Lewis structure proposed for each molecule is reasonable or not. molecule CIF 3…
A: A Lewis structure is a very simplified form of the valence electrons in a molecule . electrons are…
Q: Predict the products of the following reaction. If no reaction will occur, use the NO REACTION…
A: Since, Balanced reaction means number of atoms in both side are present in equal number. Thus,
Q: Curved arrows are used to illustrate the flow of electrons. Using the provided starting and product…
A:
Q: The concentration of your solution is 0.0400 M. You measure the pH to be 8.416. What is the kb based…
A:
Q: Complete the table below. Round each of your entries to 2 significant digits. You may assume the…
A:
Q: If an average sodium atom weighs 22.99 amu, how many sodium atoms are contained in 6.05 x 1013 amu…
A: We will use following formula-
Q: The pressure gauge on a 100 L cylinder used to fill balloons with helium shows a pressure of 100.…
A:
Q: (21-25). Given that the vapor pressure of pure water at 30°C is 31.82 mm Hg, calculate the vapor…
A: The question is based on the concept of colligative property. relative lowering in vapour pressure…
Q: I manufactured 1 litters of bike or car washing shampoo. Now for coloring the shampoo ,what are…
A: When it comes to coloring agents or dyes for formulations, there are several factors to consider…
Q: Curved arrows are used to illustrate the flow of electrons. Using the provided arting and product…
A:
Q: Starting with benzene and using any other reagents of your choice, design a synthesis for the…
A: We need to synthesize the given compound from benzene by using the given list of reagents. The given…
Q: Preparation of the buffer You have a solution of 50X TAE buffer. You want to prepare 320 mL of 1X…
A:
Q: The enthalpy for combustion for ethanol at 298 K is -1370.7 kJ/mole and occurs via the following…
A: Internal energy is a fundamental concept in thermodynamics that refers to the total energy of a…
Q: Borohydride reductions of aldehydes and ketones can also be accomplished using zinc borohydride,…
A:
Q: 13 Question (1 point) Draw the curved arrow notation and products for the each elementary step…
A: There are two main types of elimination reactions: E1 and E2. E1 reactions are characterized by a…
Q: At what pH is the concentration of [Pb2+] 2.5 x 10-4 M in a saturated solution of Pb(OH)2(s), given…
A: The question is based on the concept of solubility product principle. It that states that when a…
Q: 1. Why does the tip of your buret need to be free of air bubbles?
A: Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: 23. A student adds bromine solution to a test tube containing an isomer of C3H6. After shaking the…
A: 23) Given that a student adds bromine solution to a test tube containing an isomer of C3H6. After…
Q: An optically active alkyne A (C10H14) can be catalytically hydrogenated to butylcyclohexane.…
A: Given data is A is an optically active alkyne (C10H14) Catalytically hydrogenation of A gives…
Q: Use the References to access important values if needed for this question. A solution contains…
A: The question is based on the concept of solubility product principle. It that states that when a…
Q: Identify the missing products A and B in the following transformation? CI OH a) A = 2 and B = 4 b) A…
A: The question is based on organic reactions. we need to identify the product formed and explain…
Q: Compound A reacts with Compound B to form only one product, Compound C , and it's known the…
A: Given Mass of A = 8.0 g Mass of C = 8.2 g % yield= 91 %
Q: Bicyclo[2.2.0]hexane -> cyclohexane-1,4-dione || II ? => =0
A: Given that, a reaction scheme is shown below We have to carry out the following synthesis.
Q: Determine whether aqueous solutions of the following salts are acidic, basic, or neutral: A. NaNO3…
A: A neutral salt is produced from a strong acid and a strong base. A weak acid OR base is produced…
Q: What is the purpose of adding two drops of acetic acid in thin layer chromatography of plant…
A: Thin layer chromatography (TLC) is a type of chromatography used to separate and identify the…
Q: What happens to the reaction below when more A is added to the reaction mixture? A (g) + 4B (g) ⇌…
A: The question asked about the effect of adding more A to a chemical reaction mixture, which is an…
Q: How many cis/trans isomers does this molecule have? Enter the number in the box above the drawing…
A: Cis isomer contains the same group of atoms on the same side of a bond of restricted rotation. Trans…
Q: BeClz BF3 SnCh CH4 NH₁ HO PCIs SF4 BrF3 XeF₂ SF6 IFs 1. Use the Lewis Structures from your prelab to…
A: The shape, geometry of a molecules can be deduced by using valence shell electron pair repulsion…
Q: 6. Given the reaction: CH3(CO)CH3 (M) 0.010 0.020 0.010 0.040 0.040 0.020 CH3(CO)CH3 12 (M) 0.010…
A: The question is based on chemical kinetics. We have to calculate rate constant , order of the…
Q: How many electron gain by NO? Is the bond order chnge from 2.5 to 2? or to 1?
A: Given two molecular orbital diagrams of NO is -
Q: Consider the titration of a 29.0 mL sample of 0.170 mol L-1 CH₂COOH (K=1.3 x 10-5) with 0.120 mol…
A: Since you have posted a question with multiple sub-parts, we will provide the solution only to the…
Q: Be sure to answer all parts. Find the pH of the two equivalence points and the volume (mL) of 0.0784…
A: Titration of 17.3 mL of 0.130 M H2CO3 with 0.0784 M KOH.We have to find out the pH of the two…
Q: a. C. Determine the reaction order of each of the following reactants. -13 2- e. 1 0- 0 Time (s) 0…
A: The rate of a chemical reaction is defined as the change in concentration of a reactant or product…
Q: 2. State the name of each of the following reactions (acid/base, Lewis acid/base, resolution,…
A: According to Lewis theory, Lewis acid are electron pair acceptor and Lewis base are electron donor.…
Q: Complete the following table, which lists information about the measured acid dissociation constants…
A:
Q: Why is it reasonable to set the chemical potential of a pure liquid or of a pure solid equal to its…
A: chemical potential of a substance is the chemical energy per mole of the substance.” In this…
Q: An unknown weak base with a concentration of 0.0910 M has a pH of 11.70. What is the Kb of this…
A:
Q: Complete the balanced molecular chemical equation for the reaction below. If no reaction occurs,…
A:
Q: Complete the following nuclear decay process: 227 89AC4₂He +. - A) 22387Fr B) 22790Th C) 22789AC D)…
A:
Q: A 25.0 mL solution of HNO3 is neutralized with 15.7 mL of 0.250 M Ba(OH)2. What is the concentration…
A: In the given question, we have to find the concentration of HNO3 solution.
Q: 8. Which of the following cannot be oxidized? a. A tertiary alcohol b. A secondary alcohol A primary…
A:
Q: Using 1.452 mass of chlorine find the number of moles of chlorine in the sample of calcium chloride.…
A:
Q: Draw the energy diagram of the following reaction (label and draw reactants, intermediates, and…
A: This reaction gives substitution reaction product as major one. So, energy profile diagram, reaction…
Q: c. Classify the reaction represented by the following unbalanced equation by as many methods as…
A: Aqueous reactant produce solid product then this reaction is precipitation reaction. When reaction…
Q: Write the correct IUPAC name for the following structure A
A: Parent hydrocarbon ----> Cyclopentane Substituents ------> Chloro, Ethyl and Methyl
Q: Assume you are assigned to make a solution of NH4Cl with the concentration 3.9 M. What is the mass…
A:
Q: Liquid octane CH3CH26CH3 reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2 and…
A: Given, mass of octane (CH3(CH2)6CH3) reacts = 1.1 g mass of Oxygen gas (O2) reacts = 2.0 g Actual…
Q: 2. For each of the following homonuclear/heteronuclear diatomic molecules of the second ro of the…
A:
Q: What mass of silver would plate onto the cathode if a current of 6.7 AA flowed through the cell for…
A:
Q: 3. In the calorimeter which component do you think is gaining heat (metal or water)? Explain how you…
A: Please find solutions of question 3 & 4. 3. In the calorimeter which component do you think is…
Trending now
This is a popular solution!
Step by step
Solved in 4 steps
- a) At temperature 25°C, 0.02 M hydrazine, N2H4 solution is 0.69% ionised. Calculate the i. Concentration of OH- ion ii. ionisation constant, Kb b) Calculate the mass of sodium benzoate, C6H5COONa that should be added to 500 mL of 0.2M aqueous benzoic acid, C6H5COOH solution to produce a buffer with pH 3.50?[ Ka for C6H5COOH = 6.3 x10-5] c) When a 1 x 10-3 moldm-3 solution of CaCl2 is mixed with an equal volume of a 1 x 10-3 moldm-3 solution of Na2SO4, will precipitate form? (Ksp CaSO4= 2 x 10-5) Do you mean that pH? That was all the given information the question gave.. I don't understand how to use the ionised part the mostQ1.0 When 0.39 mol of solid CO2 is reacted with 0.23 mol of CH3MgBr in an ether solvent, the resulting product is isolated in aqueous solution (assuming 100% yield) and any excess CO2 is removed. Following this, 0.13 mol of HCl (aq) is added. What is the resulting solution's pH? Please note that you will need to research a pKa value for this query, and your answer should be reported to two decimal points.Your research advisor asks you to prepare a buffer solution at pH = 3.50 with capacity of about 0.100 M. Given the following solutions available (of any concentration), determine which species would give the best buffer, and give possible concentrations of the conjugate species. Dimethylamine pKb = 3.27; ethlyamine pKb = 3.35; aniline pKb =9.13; sodium nitrite pKb = 10.60.
- An employer is interviewing 4 applicants for a job as a laboratory technician and askseach of them how to prepare a buffer solution with a pH close to 11.000.Use these ka’s to help you: Show your workPropionic Acid, CH3CH2COOH, ka = 1.34 x 10-5 Ethanamine, CH3CH2NH2, kb = 6.3 x 10-4 Jung says he would mix CH3CH2COOH & CH4CH3COOHDominique says she would mix CH3CH2 NH2 & CH3CH2COOHJoshua says he would mix CH3CH2COOH & CH3COONaKyla says she would mix CH3CH2NH2 & CH3CH2NH3BrWho would you hire based on their ability to make a buffer?_________________________How many grams of Na2CO3 (FM 105.99) should be mixed with 1.70 g of NaHCO3 (FM 84.01) to produce 100 mL of buffer with pH 10.00? For carbonic acid, H2CO3 . Report the answer to the correct number of significant figuresImidazole (C3H4N2, MW = 68.07816, Kb = 9.80 x 10–8) can be used to create buffers at physiological pH’s. How many grams of imidazole and how many milliliters of 6.00 M HCl would be required to make 500.0 mL of 0.1000 M imidazole buffer with a pH of 7.20?
- One drop, 0.200 cm3, of 1.00 mol dm-3 of aqueous sodium hydroxide, NaOH, solution is added to 25.0 cm3 of a phosphate buffer that is 0.040 mol dm-3 in KH2PO4(aq) and 0.020 mol dm-3 in K2HPO4(aq). Calculate the resulting pH of the solution given that the second acid dissociation constant, pKa2, for phosphoric acid is 7.21.1. How would you prepare 500.0 mI. of 0.050 M phosphate buffer solution, pH 6.7 from 0.20 M solutions of acid and salt? 2. What will be resulting pH of the buffer in Question #1 if the following are added: a. 1.0 mL of 1.0 M HCI b. 1.0 mL of 1M NaOH 3. Compare the results in question # 2 if these reagents were added to 500 mL of distilled water instead? Interpret your results.When titrating a 25 mL solution of 0.20M CH3COOH with 0.10M KOH, you realize you forgot to add an indicator initially. You've added 10 mL of KOH to the flask of acid. Ka of CH3COOH = 1.8 x 10^-5 1) Calculate the pH at this point 2) What color would your solution be if you add 40 mL KOH more. And a few drops of clorophenol blue indicator at this point. Why?
- The desired pH is 6.4 in creating a buffer system/buffer solution of about 50-60mL. Therefore, a student picks Silicic Acid Si(OH)4, as 1mL of 1M of the acid has a pH of 6.4, which also has a pKa of 9.82. What is the ratio HA/A- and ratio A-/HA-? The buffering capacity will be checked by the addition of 1mL of 1M HCl or 1mL of 1M NaOH and should not change by more than 0.25pH units.What will be the appropriate pH of a buffer prepared by mixing 100 ml of 0.1 M Na2HPO4 and 100 ml of 0.1 M NaH2PO4? (For H3PO4, pKa1 = 2.1; pKa2 = 6.8; pKa3 = 12.5) Ans in 2 significant figuresA. What two compounds would be best to use in preparing a pH 9.0 buffer solution? justify your answer. Assume you have the acids and the sodium salts of their conjugate bases available to you. Answer: The two compounds best fo preparing a buffer solution with a pH of 9.0 would be hydrocyanic (HCN) and phenol (HOc6H5) because their pKa values are 9.40 and 9.80 respectively making their pH levels the closest to 9. B. WHat mass ration of sodium to acid is needed to prepare this buffer? C. Can this buffer solution better resist pH changes from a string acid addition or strong base addition?