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Please answer the following question completely and correctly.
Please underline the answer.
An acid-base indicator, HIn,...
An acid-base indicator, Hin, dissociates according to the reaction shown in an aqueous solution. K. HIn...
An acid-base indicator, Hin, dissociates according to the reaction shown in an aqueous solution. K. HIn HIn(aq) In (aq) + H+ (aq) The protonated form of the indicator, HIn, has a molar absorptivity of 2089 M-.cm-1 and the deprotonated form, In, has a molar absorptivity of 14310 M-1.cm-1 at 440 nm. The pH of a solution containing a mixture of HIn and In is adjusted to 6.20. The total concentration of HIn and In is 0.000200 M. The absorbance of...
A mixture is prepared using 27.00 mL of a 0.0786 M weak base (pKa 4.635), 27.00...
A mixture is prepared using 27.00 mL of a 0.0786 M weak base (pKa 4.635), 27.00 mL of a 0.0590 M w Map acid (pKa 3.252) and 1.00 mL of 0.000105 M HIn and then diluting to 100.0 mL, where HIn is the protonated indicator. The absorbance measured at 550 nm in a 5.000 cm cell was 0.1063. The molar absorptivity (E) values for HIn and its deprotonated form In at 550 nm are 2.26 x104 Mcmand 1.53x104 M-cm1 respectively....
Please help! You would like to create a reflection grating like the one shown, with an...
Please help!
You would like to create a reflection grating like the one shown, with an incident angle (0) of 40°. Calculate the number of lines per centimeter that should be etched in the grating for cach condition. Incident light d Emerging light A first order diffraction angle (6) of -31° for visible light with a wavelength of 550 nm. lines per centimeter: lines/cm A first order diffraction angle () of -31° for infrared light with a wavelength of 0.00500...
Q2. Consider a solution of an indicator (HIn) with an acid dissociation constant of 1.42x10 5and...
Q2. Consider a solution of an indicator (HIn) with an acid dissociation constant of 1.42x10 5and a molar absorptivities of the indicator species at 430 nm and 570 nm are (HIn in 0.1 M HCl is 6.30x10 and 7.12 x 10') and for (In in 0.1 M NaOH is 2.06x 10 and 9.60 x 10). (5.5 marks) a) What are the concentration of [HIn] and [In] b) Calculate the absorbances at two wavelengths for the dissociation process using 1.00 cm-cells?...
Please help me answer the following questions: (iv) Calculate the molar extinction coefficient (molar absorptivity) of t...
Please help me answer the following
questions:
(iv) Calculate the molar extinction
coefficient (molar absorptivity) of the maximum absorbance of the
spectrum in Figure 1.
(v) Estimate the wavenumber gap
between the vibrational levels that gives the vibronic structure
apparent in the spectrum of anthracene. Check your answer before
proceeding to answer the next question. (Note: the peaks
are a single vibronic progression so you can average your estimates
of the wavenumber gap.)
5 M compound (2) Figure 1: Absorbance...
(1 punt) viethyl orange is an acid-base indicator. In solutions of pH <3.1 it is red...
(1 punt) viethyl orange is an acid-base indicator. In solutions of pH <3.1 it is red (absorbs around 550nm), and in solutions of pH > 4.4 it is yellow (absorbs around 650nm). Identify which structure is fed and which is yellow. Draw at least one resonance structure that helps to support your decision. 5. (1 point) A solution of 4-methyl-3-penten-2-one in ethanol shows an absorbance of 0.52 at 236 nm in a cell with a 1.00 cm light path. Its...
answer please Question 1 12.5 points Save Answer The complex that is formed between galium (1)...
answer please
Question 1 12.5 points Save Answer The complex that is formed between galium (1) and B-hydroxyquinoline has an absorption maximum of 568nm. A 0.0082M solution of the complex has a transmittance of 42.9% when measured in a 1.00-cm cell at this wavelength. Calculate the molar absorptivity of the compex. Question 2 of 8 Question 2 12.5 points Save Answ Chromium(III) forms a complex with diphenylcarbazide whose molar absorptivity is 4.17X104 at 540 nm. Calculate the path length in...
Please answer the relaxation time question correctly with the correct units asked in the question...
please answer the relaxation time question correctly with the
correct units asked in the question. thank you
The pKa of NH4+ is 9.25 at 25°C. The rate constant at 25°C for the reaction of NH4+ and OH- to form aqueous NH3 is 4.0x1010 dm3 mol-1 s- Calculate the rate constant for proton transfer to NH3. What relaxation time would be observed if a temperature jump were applied to a solution of 0.13 mol dm-3 NH3(aq) at 25°C? 0.027 ns
The...
An acid-base indicator, Hin, dissociates according to the reaction shown in an aqueous solution. K. HIn HIn(aq) In (aq) + H+ (aq) The protonated form of the indicator, HIn, has a molar absorptivity of 2089 M-.cm-1 and the deprotonated form, In, has a molar absorptivity of 14310 M-1.cm-1 at 440 nm. The pH of a solution containing a mixture of HIn and In is adjusted to 6.20. The total concentration of HIn and In is 0.000200 M. The absorbance of...
A mixture is prepared using 27.00 mL of a 0.0786 M weak base (pKa 4.635), 27.00 mL of a 0.0590 M w Map acid (pKa 3.252) and 1.00 mL of 0.000105 M HIn and then diluting to 100.0 mL, where HIn is the protonated indicator. The absorbance measured at 550 nm in a 5.000 cm cell was 0.1063. The molar absorptivity (E) values for HIn and its deprotonated form In at 550 nm are 2.26 x104 Mcmand 1.53x104 M-cm1 respectively....
Please help!
You would like to create a reflection grating like the one shown, with an incident angle (0) of 40°. Calculate the number of lines per centimeter that should be etched in the grating for cach condition. Incident light d Emerging light A first order diffraction angle (6) of -31° for visible light with a wavelength of 550 nm. lines per centimeter: lines/cm A first order diffraction angle () of -31° for infrared light with a wavelength of 0.00500...
Q2. Consider a solution of an indicator (HIn) with an acid dissociation constant of 1.42x10 5and a molar absorptivities of the indicator species at 430 nm and 570 nm are (HIn in 0.1 M HCl is 6.30x10 and 7.12 x 10') and for (In in 0.1 M NaOH is 2.06x 10 and 9.60 x 10). (5.5 marks) a) What are the concentration of [HIn] and [In] b) Calculate the absorbances at two wavelengths for the dissociation process using 1.00 cm-cells?...
Please help me answer the following
questions:
(iv) Calculate the molar extinction
coefficient (molar absorptivity) of the maximum absorbance of the
spectrum in Figure 1.
(v) Estimate the wavenumber gap
between the vibrational levels that gives the vibronic structure
apparent in the spectrum of anthracene. Check your answer before
proceeding to answer the next question. (Note: the peaks
are a single vibronic progression so you can average your estimates
of the wavenumber gap.)
5 M compound (2) Figure 1: Absorbance...
(1 punt) viethyl orange is an acid-base indicator. In solutions of pH <3.1 it is red (absorbs around 550nm), and in solutions of pH > 4.4 it is yellow (absorbs around 650nm). Identify which structure is fed and which is yellow. Draw at least one resonance structure that helps to support your decision. 5. (1 point) A solution of 4-methyl-3-penten-2-one in ethanol shows an absorbance of 0.52 at 236 nm in a cell with a 1.00 cm light path. Its...
answer please
Question 1 12.5 points Save Answer The complex that is formed between galium (1) and B-hydroxyquinoline has an absorption maximum of 568nm. A 0.0082M solution of the complex has a transmittance of 42.9% when measured in a 1.00-cm cell at this wavelength. Calculate the molar absorptivity of the compex. Question 2 of 8 Question 2 12.5 points Save Answ Chromium(III) forms a complex with diphenylcarbazide whose molar absorptivity is 4.17X104 at 540 nm. Calculate the path length in...
please answer the relaxation time question correctly with the
correct units asked in the question. thank you
The pKa of NH4+ is 9.25 at 25°C. The rate constant at 25°C for the reaction of NH4+ and OH- to form aqueous NH3 is 4.0x1010 dm3 mol-1 s- Calculate the rate constant for proton transfer to NH3. What relaxation time would be observed if a temperature jump were applied to a solution of 0.13 mol dm-3 NH3(aq) at 25°C? 0.027 ns
The...
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