Draw a logarithmic concentration diagram illustrating the effect of fluoride concentration on the relative concentrations of...
Draw a logarithmic concentration diagram illustrating the effect of fluoride concentration on the relative concentrations of various fluoride complexes of aluminium (Al3+), assuming [Al3+] = 10-4 M. Which complex predominates at a fluoride concentration of (i) 0.1 mg/L and (ii) 10 mg/L.
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Draw a logarithmic concentration diagram illustrating the effect
of fluoride concentration on the relative concentrations of...
4. An energy diagram for electrophilic aromatic substitution of benzene with Br2 with FeBr3 as catalyst...
4. An energy diagram for electrophilic aromatic substitution of benzene with Br2 with FeBr3 as catalyst below. The rate-limiting step is formation of the sigma complex (Step 1). Generally, any factor that stabilizes the sigma complex also stabilizes the transition-state leading to that complex. This effect leads to a lower transition-state energy and a faster reaction. rate-limiting transition state reactants + Br + FeBrz Η Br FeBr + O energy intermediate products Br + HBr + FeBr 3 -45 kJ/mol...
3. The enzyme chymotrypsin is a protease that is competitively inhibited by a red dye. This...
3. The enzyme chymotrypsin is a protease that is competitively inhibited by a red dye. This protein and dye are combined in a solution and reach chemical equilibrium: protein + dye complex Prior to obtaining equilibrium and before any complexes have formed, the concentration of protein is G,o = 1.0 x 10-4 M and the concentration of dye is cd,o-2.0 x 10-3 M. (i) Write a simple expression that relates the equilibrium concentrations of protein cp and complex ce to...
13. Hydrogen Fluoride (HF) is a covalentens It is: ANonpolar B. Polar 14. Would you expect...
13. Hydrogen Fluoride (HF) is a covalentens It is: ANonpolar B. Polar 14. Would you expect water to dissolve Hydrogen Fluoride? A. Yes B. No 15. What is the best equation for the dissociation (ionization) using HF instead of HCl, understanding that HF is a WEAK electrolyte (and acid). A. HF(g) + H2O(l) HF (aq) B. HF(g) + H2O(1) - H +F C. HF(g) + H2O(l) HUF 16. You dissolve 1 mole of HF(g) in water and bring the volume...
You have a mixture of three soluble cations with the following concentrations: i. Ag+ with [Ag+]...
You have a mixture of three soluble cations with the following concentrations: i. Ag+ with [Ag+] = 0.02 M ii. Ca2+ with [Ca2+] = 0.1 M and iii. Ba2+ with [Ba2+] = 0.1 M Assuming that you are slowly adding CrO42- ions, which ion will precipitate first, second and third? The following Ksp values are provided. Ksp of Ag2CrO4 is 1.9 × 10-12 Ksp of CaCrO4 is 7.1 × 10-4 Ksp of BaCrO4 is 1.2 × 10-10 1. Ag+ first,...
Grade: DETERMINATION OF PHOSPHATE IN WATER 1. Option What is the concentration of phosphate in the...
Grade: DETERMINATION OF PHOSPHATE IN WATER 1. Option What is the concentration of phosphate in the original lake water sample if the unknown lake water sample in the option had been diluted by taking 25.0 mL of lake water and diluting it to the indicated final volume? 21.comgy 2. Option Water treatment plants must reduce phosphate levels to 3.2 micromoles PO 3-/L before the water is considered drinkable. If water from Lake Pontchartrain is determined to have a phosphate concentration...
Draw a molecular-orbital diagram for LiH and write the electronic configuration. Indicate the relative energies of the...
Draw a molecular-orbital diagram for LiH and write the
electronic configuration.
Indicate the relative energies of the Li 2s and H 1s atomic
orbitals by reference to the VOIE values in Table 4-4.
The first ionization energy of LiH has not been measured, but
calculation predicts it to be about 8 eV.
To support this value, which atom in LiH must have a partial
negative charge?
(table 4-4 in pic)
10. Draw a molecular-orbital diagram for LiH and write the...
Draw a molecular-orbital diagram for LiH and write the electronic configuration. Indicate the relative energies of...
Draw a molecular-orbital diagram for LiH and write the
electronic configuration.
Indicate the relative energies of the Li 2s and H 1s atomic
orbitals by reference to the VOIE values in Table 4-4.
The first ionization energy of LiH has not been measured, but
calculation predicts it to be about 8 eV.
To support this value, which atom in LiH must have a partial
negative charge?
(table 4-4 in pic)
10. Draw a molecular-orbital diagram for LiH and write the...
1) A spherical mammalian cell of radius ‘R’ is infected by a single coccus bacterium having 100 t...
1) A spherical mammalian cell of radius ‘R’ is infected by a single coccus bacterium having 100 times smaller radius. Given that the host cell will lyse when 1/2 of the cell volume is taken up by the bacterium, approximately how many times will the bacterium divide before the host cell is lysed? Options : 1. 19 2. 3X105 3. 106 4. 40 2) Two experiments were conducted with an enzyme following Michaelis Menten kinetics at substrate concentrations of 0.5...
Can't figure out the concentration of the complex of solns. 10, 11, 12, 13, & 14. Modern...
Can't figure out the concentration of the complex of
solns. 10, 11, 12, 13, & 14.
Modern Experimental Chemistry Chemistry 153 The Iron(III) Thiocyanate Complex Purpose of the Experiment To determine the chemical formula of a complex ion and measure its formation equilibrium constant Equipment Spectro Vis spectrophotometer and LabQuest, cuvette, 25-mL buret (3), ring stand, buret clamp (2), 50-mL beaker (3), small plastic beakers Reagents SCN, as KSCN, 0.00200 M solution Fe; as Fe(NO), 0.00200 M solution and a...
Clear handwriting The Zn-S-O-H20 Eh-pH diagram and the hydroxide precipitation diagram shown below from the literature...
Clear handwriting
The Zn-S-O-H20 Eh-pH diagram and the hydroxide precipitation diagram shown below from the literature is useful in predicting leaching and precipitation reactions of sulfides and oxides/hydroxides. Answer the following questions relevant to these diagrams (a) Write the balanced chemical equations relevant to zinc leaching in solutions represented by lines 4, 5, 18 and 19 (b) Calculate the theoretical pH of a solution of 12 mol/L NaOH at 25 °C, assuming unit activity coefficients (H2O=H*+OH;; K = 1014 at...
4. An energy diagram for electrophilic aromatic substitution of benzene with Br2 with FeBr3 as catalyst below. The rate-limiting step is formation of the sigma complex (Step 1). Generally, any factor that stabilizes the sigma complex also stabilizes the transition-state leading to that complex. This effect leads to a lower transition-state energy and a faster reaction. rate-limiting transition state reactants + Br + FeBrz Η Br FeBr + O energy intermediate products Br + HBr + FeBr 3 -45 kJ/mol...
3. The enzyme chymotrypsin is a protease that is competitively inhibited by a red dye. This protein and dye are combined in a solution and reach chemical equilibrium: protein + dye complex Prior to obtaining equilibrium and before any complexes have formed, the concentration of protein is G,o = 1.0 x 10-4 M and the concentration of dye is cd,o-2.0 x 10-3 M. (i) Write a simple expression that relates the equilibrium concentrations of protein cp and complex ce to...
13. Hydrogen Fluoride (HF) is a covalentens It is: ANonpolar B. Polar 14. Would you expect water to dissolve Hydrogen Fluoride? A. Yes B. No 15. What is the best equation for the dissociation (ionization) using HF instead of HCl, understanding that HF is a WEAK electrolyte (and acid). A. HF(g) + H2O(l) HF (aq) B. HF(g) + H2O(1) - H +F C. HF(g) + H2O(l) HUF 16. You dissolve 1 mole of HF(g) in water and bring the volume...
Grade: DETERMINATION OF PHOSPHATE IN WATER 1. Option What is the concentration of phosphate in the original lake water sample if the unknown lake water sample in the option had been diluted by taking 25.0 mL of lake water and diluting it to the indicated final volume? 21.comgy 2. Option Water treatment plants must reduce phosphate levels to 3.2 micromoles PO 3-/L before the water is considered drinkable. If water from Lake Pontchartrain is determined to have a phosphate concentration...
Draw a molecular-orbital diagram for LiH and write the
electronic configuration.
Indicate the relative energies of the Li 2s and H 1s atomic
orbitals by reference to the VOIE values in Table 4-4.
The first ionization energy of LiH has not been measured, but
calculation predicts it to be about 8 eV.
To support this value, which atom in LiH must have a partial
negative charge?
(table 4-4 in pic)
10. Draw a molecular-orbital diagram for LiH and write the...
Draw a molecular-orbital diagram for LiH and write the
electronic configuration.
Indicate the relative energies of the Li 2s and H 1s atomic
orbitals by reference to the VOIE values in Table 4-4.
The first ionization energy of LiH has not been measured, but
calculation predicts it to be about 8 eV.
To support this value, which atom in LiH must have a partial
negative charge?
(table 4-4 in pic)
10. Draw a molecular-orbital diagram for LiH and write the...
Can't figure out the concentration of the complex of
solns. 10, 11, 12, 13, & 14.
Modern Experimental Chemistry Chemistry 153 The Iron(III) Thiocyanate Complex Purpose of the Experiment To determine the chemical formula of a complex ion and measure its formation equilibrium constant Equipment Spectro Vis spectrophotometer and LabQuest, cuvette, 25-mL buret (3), ring stand, buret clamp (2), 50-mL beaker (3), small plastic beakers Reagents SCN, as KSCN, 0.00200 M solution Fe; as Fe(NO), 0.00200 M solution and a...
Clear handwriting
The Zn-S-O-H20 Eh-pH diagram and the hydroxide precipitation diagram shown below from the literature is useful in predicting leaching and precipitation reactions of sulfides and oxides/hydroxides. Answer the following questions relevant to these diagrams (a) Write the balanced chemical equations relevant to zinc leaching in solutions represented by lines 4, 5, 18 and 19 (b) Calculate the theoretical pH of a solution of 12 mol/L NaOH at 25 °C, assuming unit activity coefficients (H2O=H*+OH;; K = 1014 at...
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