The ionization of p-nitrophenol is shown below (pKa= 7.0) a) At pH 7, what are the relative concentrations of ionized and un-ionized p-nitrophenol? b) If enough concentrated hydrochloric acid is added to a solution of p-nitrophenol to lower the pH from 7 to 5, what will happen to the relative concentrations of the ionized and un-ionized forms? c) A solution of p-nitrophenol at pH 8.3 was found to have an A400 of 0.550. What is the total concentration (in um) of p-nitrophenol (ionized plus un-ionized) in the solution? The molar extinction coefficient of p-nitrophenol is 19,500M-1cm-1 and the pKa is 7.

Q: A water sample was collected from a deep lake. At 25 C, the pH was

A: Given: pH of the water sample = 7.0 Concentration of dissolved oxygen = 0.32 mg/L To calculate: i)…

Q: Science 9 Molar analysis Contents Sugar Coconut oil Chemical Formula Molar Mass per Atom Molecular…

A: Since you have posted multiple questions as per guidelines we will solve only the first question for…

Q: Complete the table below by deciding whether a precipitate forms when aqueous solutions A and B are…

A: Here we are required to find the formula of the precipitate formed.

Q: If 50.0 g H2O at 13.6 °C is combined with 244 g H2O at 93.7 °C, what is the final temperature of the…

A:

Q: In the reduction of ethyl vanillin, why is 3-ethoxy-4-hydroxybenzaldehyde a white solid however when…

A: More the conjugation  more will be color imparting  tendencies.

Q: The drawing below shows a mixture of molecules: carbon nitrogen oxygen key hydrogen sulfur chlorine…

A: Given mixture of molecules is

Q: Which elements are most similar in atomic size? (A) H (Z = 1) and Li (Z = 3) (B) C (Z = 6) and Si (Z…

A: In this question given four sets of elements. 1. H and Li 2. C and Si 3.Mn and Tc 4. Zr and Hf   We…

Q: How to determine stereochemistry of disubstitued cyclohexane molecules, and if they are meso,…

A:

Q: Contents Sugar Coconut Oil iodized salt palm oil milk Chemical Formula Molor Mass per Atom Molecular…

A: The molar mass of the compound is calculated by adding the molar mass of each atom in the chemical…

Q: solution at 25°C is measured as 8.97 x 10^-5 M, what is the pH of the solution? Report answer with…

A: pH is equal to the negative logarithmic of hydrogen ion concentration

Q: closed system initially contains 1.5 x 10-2 M of molecular hydrogen and 2.5 x 10-2 M of molecular…

A:

Q: Benzene (C6H6) undergoes combustion according to: 2C6H6(l)+15O2(g)→12CO2(g)+6H2O(l)ΔHo=−6535kJ All…

A:

Q: 7. Write the Q expression and Nernst equation representing the following reactions: (a) Mg(s) + Sn2+…

A:

Q: An ion has 21 neutrons, 12 electrons, and a -3 charge.  What is its atomic number?

A:

Q: Draw the product of the substitution reaction shown below. Ignore the inorganic byproducts. CH3I…

A:

Q: Multiply or divide the following measurements. Be sure each answer you enter contains the correct…

A: Given measurements: We have to multiply or divide these measurements.

Q: What would be a proposed mechanism to get from cyclohexanol to cis-2-methoxycyclohexanol? I know…

A: Note- Here we have to synthesize cis- 2-methoxycyclohexanol from starting material cyclohexanol.

Q: Q1/What product would you expect to be the product only obtained for each reaction NEN AICI3 ? la…

A: 1) The 1st reaction is friedel craft alkylation. The reaction happens through the formation of…

Q: 12. For reactions a. and b. below (a) Write the substitution product(s) (b) Show the mechanism and…

A:

Q: Need D, E, F

A:

Q: QUESTION 7 In the following molecule, how many MeO groups in the following molecule are in axial…

A: This problem is based on general organic chemistry. Which can be stated as a part of…

Q: A metal is dropped into a graduated cylinder containing methanol.  The metal weighed 4.50 g.  If the…

A:

Q: Counting significant digits when measurements are multiplied o... Multiply or divide the following…

A: Rules for determining the number of significant figures in an answer : The result of an addition or…

Q: 1. Consider the reaction: C₂H₂ (g) + 4 F2 (g) → 2 CF4 (g) + H₂(g) (kJ/mol) Substance C₂H₂ (g) F2 (g)…

A:

Q: Explain why the emission of light energy of lower energy in fluorescence is not a viola- tion of the…

A: When the molecule absorbs photon of frequency, vex in the singlet ground state (So), it gets excited…

Q: Hydrogen chloride gas and oxygen react to form water vapor and chlorine gas. What volume of water…

A: we have to calculate the volume of water produced in the reaction

Q: gas (the system) trapped in a piston is heated as it is compressed. What is known about the signs of…

A:

Q: A reaction between liquid reactants takes place at 20.0 °C in a sealed, evacuated vessel with a…

A:

Q: (a) 5. Assign the R and S configurations for all stereogenic centers in the following BI H H₂C Br Br…

A:

Q: Hospitals use radioactive tracers in many medical tests. After the tracer is used, it must be stored…

A: Given, The proportion of radioactivity remaining after t days is e−0.087t.

Q: Draw an alkyl halide that would undergo SN2 reaction to yield this product under the conditions…

A: We have to draw the starting alkyl halide for the SN2 reaction given

Q: So I thought with a chiral center we see a racemic mixture. Can you explain why we don't see this in…

A: In SN1 reaction , a racemic mixture is formed because carbocation formed is planner and incoming…

Q: The molecule below has one lone pair. What orbital is the lone pair found in? A. s B. sp C. sp2 D. p

A: we have to determine the orbital that contains the lone pair

Q: A chemist must dilute 85.6 mL of 119. mM aqueous potassium permanganate (KMnO4) solution until the…

A:

Q: A patient with respiratory alkalosis has a blood plasma pH of 7.57. What is the [H3O+] of the blood…

A: Hydronium ion concentration is an important parameter of an aqueous solution. The concentration of…

Q: at 25°C only 0.0450 mol of the generic salt AB3 is soluble in 1.00L of water what is the ksp of the…

A:

Q: How many moles of water, H 2O, are present in 75.0 g of H 2O?     75.0 moles     7.50 moles…

A: Since, Moles is the ratio of mass to the molar mass of that atom or molecules. Then,

Q: Complete the following statement: In Charles's Law, the volume of a gas __________ when the…

A:

Q: Which of the following are independent of the identity of a gas (assuming ideal behavior) (select…

A: Ideal gas law states that: PV = nRT In terms of molar mass of gas (M), PV=mMRT where P is the…

Q: A 1.00-L flask at 23 °C contains 0.0388 mol of N2, 0.147 mol of CO, and 0.0803 mol of H2. What is…

A:

Q: B. Stereoisomers 1. Draw each structure and determine how ma A. 4-chloro-3-hexen-2-ol B.…

A: Configurational Isomers are two types of configurational isomers as geometrical isomers and optical…

Q: A compound with the formula C2H4BrF has the following NMR spectrum.  Draw the structure for this…

A: Given Organic compound: C2H4BrF i)To draw the structure of the compound. ii) To calculate the…

Q: Multiply or divide the following measurements. Be sure each answer you enter contains the correct…

A:

Q: What is the degree of unsaturation of C8H10CINO? a. 3 b.4 c. 5 d. 6 O a Ob O c Od

A:

Q: H 0= Ph- N- Ph Jza CI N N Light CHO 1) CH₂N₂ 2) light heat Ph- N-

A:

Q: if a buffer solution is 0.210 M in a weak acid (Ka= 5.5 x 10^-5) and 0.510 M in its conjugate base…

A:

Q: 애 Conc H2SO4 스

A: Alcohols gets dehydrated in the presence of small amount of acid and heat to give alkene. The major…

Q: Determine the freezing point of the solution. Express your answer in degrees Celsius to two decimal…

A: Given - Mass of ethylene glycol = 33.1g              Volume of water = 93.4 mL              Density…

Q: water react to form acetylene and calcium hydroxide: CaC₂(s) + 2 H₂O(g) → C₂H₂(g) + Ca(OH)2(s) In…

A:

Q: a) A mixture of hydrocarbons contains 33.9% hexane (C6H14) 11.3% octane (C8H18) and 54.8% heptane…

A: we have to calculate  a) mass of CO2  b) masses of P4O6 and P4O10

Amines

Amines are organic compounds with a nitrogen atom having a lone pair of electrons on it. They are derived from ammonia (NH3) wherein hydrogen atoms are substituted by an aryl or alkyl group.