Homework Answers
The activity (concentration) of a solid is taken as unity.
So, [NH4HS] = 1
Hence
K = [NH3][H2S]
#11/12 8. [H3O+] = 4.3 x 10-3M Instructions: Calculate the [H3O+] of solutions a and b;...
#11/12
8. [H3O+] = 4.3 x 10-3M Instructions: Calculate the [H3O+] of solutions a and b; calculate the [OH-] solutions c and d. 9. pH = 2.76 - PH=-lag (H3ot) 10-PP- 69 H 10-2.76 10. pH = 3.65 11. POH = 3.65 12. pOH = 6.87 Equilibrium and Le Chateleir's Principal Instructions: Write the equilibrium expression for each chemical equation. 1. 2 H250 = 2H26 +526) = [ta?? (s. 1ST 2. NH,HS(s) = NH3(g) + H2560)
Equilibrium and Le Chateleir's Principal Instructions: Write the equilibrium expression for each chemical equation. 2 H2Sg⇌2H2g+S2g...
Equilibrium and Le Chateleir's Principal Instructions: Write the equilibrium expression for each chemical equation. 2 H2Sg⇌2H2g+S2g NH4HSs⇌NH3g+H2Sg Oxidation-Reduction Reactions Instructions: Assign an oxidation state to each element, ion, or molecule. Cl- Br2 K Ca2+ Instructions: Assign an oxidation state to each atom in each compound. NaCl CH4 SbCl5 Al2O3 Instructions: Assign an oxidation state to each atom in each polyatomic ion. NH4+ Cl04- Cr2072- Mn04- Instructions: Identify the oxidation state of P in each ion. PO43- HPO42- H2PO4- H3PO4
For the following reaction, calculate how many moles of NO2 forms when 0.356 moles of the...
For the following reaction, calculate how many moles of NO2 forms when 0.356 moles of the reactant completely reacts. 2 N2O5g→4 NO2g+O2g For the following reaction, calculate how many moles of each product are formed when 0.356 moles of PbS completely react. Assume there is an excess of oxygen. 2PbSs+3O2g→2PbOs+2SO2g For the following reaction, calculate how many grams of each product are formed when 4.05 g of water is used. 2 H2O→2 H2+O2 4. Determine the theoretical yield of P2O5,...
1. Which of the following conditions defines a non-spontaneous oxidation-reduction reaction? E° + ΔG° - &
1. Which of the following conditions defines a non-spontaneous oxidation-reduction reaction? E° + ΔG° - Keq <1 E° - ΔG° - Keq <1 E° + ΔG°+ Keq >1 E° + ΔG°- Keq >1 E° - ΔG° + Keq <1 2. What information can be obtained from the Figure below? The equivalence point occurs at pH = 7.0 but the pKa is not known from the graph. Both the pOH and the...
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...
Typical Math Problems 1) What is the pH of a buffer solution which is 0.12M in...
Typical Math Problems 1) What is the pH of a buffer solution which is 0.12M in benzoic acid, pKa 4.19, and is 0.11M in sodium benzoate? 2) Find the %-diss of a buffer if the pKa 7.10 and the pH of the buffer is 7.50. 3) A weak monoprotic acid has a pKa 6.15. 50.00 mL of an 0.1250M aqueous solution of this weak acid is titrated with 0.1000M Na0H. a) What is the equivalence point volume and ½ equivalence...
A probability experiment is conducted in which the sample space of the experiment is Sequals=StartSet 1 comma 2 comma 3 comma 4 comma 5 comma 6 comma 7 comma 8 comma 9 comma 10 comma 11 comma 12 EndSe...
A probability experiment is conducted in which the sample space of the experiment is Sequals=StartSet 1 comma 2 comma 3 comma 4 comma 5 comma 6 comma 7 comma 8 comma 9 comma 10 comma 11 comma 12 EndSet{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}, event Upper F equals StartSet 4 comma 5 comma 6 comma 7 comma 8 EndSetF={4, 5, 6, 7, 8}, and event Upper G equals StartSet 8 comma 9 comma 10...
#11/12
8. [H3O+] = 4.3 x 10-3M Instructions: Calculate the [H3O+] of solutions a and b; calculate the [OH-] solutions c and d. 9. pH = 2.76 - PH=-lag (H3ot) 10-PP- 69 H 10-2.76 10. pH = 3.65 11. POH = 3.65 12. pOH = 6.87 Equilibrium and Le Chateleir's Principal Instructions: Write the equilibrium expression for each chemical equation. 1. 2 H250 = 2H26 +526) = [ta?? (s. 1ST 2. NH,HS(s) = NH3(g) + H2560)
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...
Typical Math Problems 1) What is the pH of a buffer solution which is 0.12M in benzoic acid, pKa 4.19, and is 0.11M in sodium benzoate? 2) Find the %-diss of a buffer if the pKa 7.10 and the pH of the buffer is 7.50. 3) A weak monoprotic acid has a pKa 6.15. 50.00 mL of an 0.1250M aqueous solution of this weak acid is titrated with 0.1000M Na0H. a) What is the equivalence point volume and ½ equivalence...
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