Which combination is the best choice to prepare a buffer with a pH of 9.0? HNO2; NANO2 (pk, HNO2 = 3.33) %3D NH3: NHẠCI (pKb NH3 = 4.75) HCHO2: NACHO2 (pKa HCHO2 = 3.74) C3H;N: C3H;NHCI (pK, CSH3N = 8.76)

Q: Consider this ionic isotope. The identity of the element is missing. 2+ 39 20 Which three statements…

A: In the given question we have to identify the three statement for the given ionic isotope.  it has…

Q: How much energy is needed to vaporize 1.56 kg of water at 100 °C? Record the energy in kJ. For…

A: The energy needed is given below

Q: ốc -N+ 14 14 21. 6C 7N+ le ON 14 -1e 1H

A: To solve this problem we have to know about Beta Decay .

Q: 243 + He → 2 žn + 2 Bk 214 84 Po+ 2 He + 2 _je >

A:

Q: A balloon at 30.0°C has a volume of 222 mL. If the temperature is increased to 64.1°C and the…

A:

Q: 3 2 1 11.1Н + 1Н -> Оп+- 4 4Be 2 1H 4 2He On

A:

Q: These two structures, shown as Fischer projections, are: Br H3C- H- H-N- H- NH2 Br the same compound…

A: Stereisomers are those which have same molecular formula but different arrangement of atoms in…

Q: Compare and contrast the positive and negative effects that result from the use of the Haber…

A: The Haber-Bosch process has countless pros It supports the agriculture industry (fertilizers) It…

Q: Given the following combustion of octane below C8 H18 + O2(g) CO2«g) + H2O If oxygen and carbon…

A: The energy difference between the products and reactants is known as the energy change of a…

Q: 3. Answer all parts (a) Consider the two reactions in the scheme below: Br NaN3 DMF Product and…

A:

Q: From these, what is the structure of azodye produced? но OH -NH2 H3C Но

A:

Q: 5. What is the wavelength of a wave that has a frequency of 6.1.10° Hz? Remember that c = 2.998 10°…

A: To solve this problem we will use the given formula  λ =  C/ v  Where ,  λ = wavelength…

Q: 2. Answer All Parts (a) For the following compounds, indicate whether the atoms, groups or faces…

A: Here we have to predict whether the indicated atoms or face are homotopic, enantiotopic or…

Q: m: Determine the total pressure of a gas mixture that c

A:

Q: Given the data, what pressure would the butane gas sample have at a volume of 135.0ml? Please show…

A: According to Boyle's law, at constant temperature(T) and the number of moles of gas(n), the…

Q: 3.) What would be the boiling point of ethanol at a pressure of 25 atm. The normal boiling point of…

A:

Q: Given 735 g of carbon; what volume will carbon occupy assuming it has a density of 3.5 m/L. What is…

A:

Q: How does molecular property of salicylic acid contributes its acidity?

A:

Q: PAS8 ReBra

A: Ionic compounds are those in which ions are held by electrostatic force of attraction.

Q: ulate the value ol KC Ior ne reaction: PC|3 (g) Cl2 (g) AH = Positive PCI5 (g) + Given that when 8.4…

A:

Q: In the reaction below, which is the acid? CH;OH + NaH CH;O`Na* + H2 O a. CH3OH O b. CH;O°NA* Oc H2 O…

A: Bronsted-Lowry acid-base theory: The Bronsted-Lowry acid-base theory states that the acid is a…

Q: An unknown sample containing mixed alkali (NaOH, NaHCO3, or Na,CO3) was analyzed using the double…

A: Answer - The correct option is - NaHCO3 and Na2CO3 Solution - pH - pH, historically denoting…

Q: Provide the structure of the product(s) with stereochemisty if appropriate. If multiple products…

A: In this questions, we will write the multiple products and indicate the major product. All reactions…

Q: What mass of butanol (C4H100) is reacted with oxygen to form 5.37 L of carbon dioxide at a…

A:

Q: = long form electron configuration for phosphorous.

A:

Q: Describe the Bohr model of the atom, including quantization and emission spectra. (b) Discuss the…

A: SUCCESSES OF BOHR MODEL = Bohr theory modified the atomic structure model by explaining that…

Q: Select true or false for each of the following.   Energy can be changed in form.    ΔT in units of…

A: Concepts:-   1) Energy can be changed from one form to another. Like, potential energy is converted…

Q: If the leg is broken, it is gently bent and suspended with a piece of cloth Choose The effects of…

A: Q1) If the leg is broken it shouldn't be bent because it will cause more pain and swelling and also…

Q: 3. What weight of Na,HPO, and H,PO, would be required to prepare 200mL of a buffer solution of pH…

A:

Q: OEt O OEt O i) Amine ОН HO, ii) H20 washing to remove the HCI residue N. i) What's the structure of…

A:

Q: 3 (i) In the Haker process for the production of ammonia, the following reaction occurs: N2 (g) +…

A:

Q: A solution of HA (0.197M; 81.7mL; Kp =5.5E-7) is titrated with 0.4334M KOH. Determine the pH at the…

A: pH of solution at different points can be calculated using Henderson hasselbalch equation.

Q: In the chemical engineering lab last week, the complete decomposition of 435.8 g of ammonium…

A:

Q: An unknown sample containing mixed alkali (NAOH, NaHCO3, or NazCO3) was analyzed using the double…

A:

Q: Which one(s) of these ways will convert benzene into benzoic acid? a) 1. Br2/FeBr3 2. NaCN 3.…

A:

Q: If sulfur were bonded to it would form a covalent compound. titanium zinc sodium O magnesium oXygen

A:

Q: 1. What is the ionic strength of a solution composed of 0.M NaCl and 0.2M Na,SO,?

A: 1. Given,Concentration of NaCl solution = 0. MConcentration of Na2SO4 solution = 0.2 MRequired,…

Q: Chemistry suggest mechanism of Photoinduced Electron Transfer Reaction

A: In the given problem we need to find the mechanism of the photoinduced electron transfer reaction.

Q: 4. For the reaction 2A(g) + B(g) → 4C + 3D, AG is 456.2 kJ/mol at 25.0°C. a. Write the Q expression…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: 1.28×10−4M solution of potassium permanganate has a transmittance of 0.5 when measured in a  1 cm…

A:

Q: 15. Which statement is not evidence for the wave-particle duality of light? O Light travels at a…

A: The objects bent when it seen through a galss of water is the refraction property of light only. So…

Q: 3. The equilibrium constant for the reaction: 250:(8) + O:(8) = 250,(8) is 2.8 x 10' at 25.0°C. a.…

A: Given, reaction : 2SO2(g) +O2(g)⇌2SO3(g) Equilibrium constant , Keq=2.8×102

Q: Which of the following solutions can act as a buffer? HCI and NACI NaCl and H2O NAOH and HCI NH3 and…

A: Buffer is a mixture of a weak acid and its conjugate base or a weak base and conjugate acid.…

Q: Name the following compounds: CH2 = CH-CH2-0-CH2-C H= CHe %3D

A:

Q: Why is the synthesized aspirin in the laboratory cannot be used for commercial and pharmaceutical…

A:

Q: 3. for an FCC lattice calculate the structure factor Sk.

A:

Q: Select the gas that would have the highest average molecular speed. Assume all are at the same…

A:

Q: Answers true or false to these statements: 1) The freezing point of aqueous 2.5 m CuSO4 is…

A: Here we have to predict the true or false statements .

Q: 2-Assign R or S configuration to the chirality center in each of the following molecules: H. H-CIOH…

A: R & S configurations are for enantiomers. Only even changes are allowed.

Q: An engineer turns the temperature of a gas down, holding the volume constant at 1,250 L. Initially,…

A: In this volume is constant , pressue and tempe are changing. So we can use Gay-Lussac's law to…

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.