Homework Answers
In the calculation of Ksp value of silver acetate, KSCN is taken in the burette. This acts as Self indicator.
Option b is right answer
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17. The indicator you used in the silver acetate Ksp experiment was: a) AgC2H302 b) KSCN...
Part A) Part B) Silver chromate is sparingly soluble in aqueous solutions. The Ksp of Ag,...
Part A)
Part B)
Silver chromate is sparingly soluble in aqueous solutions. The Ksp of Ag, CrO, is 1.12 x 10-12 M'. What is the solubility (in moles per liter) of silver chromate in a 1.30 M potassium chromate aqueous solution? solubility: What is the solubility (in moles per liter) of silver chromate in a 1.30 M silver nitrate aqueous solution? solubility: M . What is the solubility (in moles per liter) of silver chromate in pure water? solubility: solubility:...
What indicator was used to monitor the pH change? Select one: a. thymolphthalein b. horseradish peroxidase...
What indicator was used to monitor the pH change? Select one: a. thymolphthalein b. horseradish peroxidase c. bromothymol blue d. phenolphthalein
151-Experiment 7-12 2. (2 pts) Which reaction below illustrates complex formation? Circle the one correct answer....
151-Experiment 7-12 2. (2 pts) Which reaction below illustrates complex formation? Circle the one correct answer. a) 2 AgNO3 (aq) + CaCl2 (aq) + 2 AgCl (s) + Ca(NO3)2 (aq) b) AgCl (s) + NaCl (aq) → Na[AgCl2] (aq) c) K3 [Fe(SCN)6] (aq) + K4(EDTA) (aq) → K[Fe(EDTA)](aq) + 6 KSCN (aq) d) [Fe(H2O)6](NO3)3 (aq) → [Fe(H2O)(OH)](NO3)2 (aq) + HNO3 (aq) e) 2 K4[Fe(CN)6] + Cl2 → 2 K3[Fe(CN)6] + 2 KC1
A chemist requires a solution of 2.00 M Fe2+ for an experiment. (The Ksp of Fe(OH)2...
A chemist requires a solution of 2.00 M Fe2+ for an experiment. (The Ksp of Fe(OH)2 is 4.9x10-17) a) Will the precipitation of Fe(OH)2 (s) be an issue if the solution is prepared with pure water at 25°C? b) [1 pt] What might the chemist do to prepare this Fe2+ solution to the desired concentration?
1- What was the starting concentration of Nalidixic acid used for the MIC experiment? a. 32...
1- What was the starting concentration of Nalidixic acid used for the MIC experiment? a. 32 µg/ml b. 1024 µg/ml c. 512 µg/ml d. 2048 µg/ml 2-A species of bacteria underwent the Hugh and Liefsens test, following incubation both tubes were showing a colour change from green to yellow. This means that the species of bacteria being tested is a: a. Oxidiser b. Non-utiliser c. Fermenter d. None of these 3- What is the pH indicator included in the selective...
15. Which mixture would be the best buffer? a. 1M HF; 0.01 MF d. 0.1 M HC2H2O2; 0.01 M C2H302 b. 2 M HCl; 0.5 MCI e...
15. Which mixture would be the best buffer? a. 1M HF; 0.01 MF d. 0.1 M HC2H2O2; 0.01 M C2H302 b. 2 M HCl; 0.5 MCI e. 0.003 M HCIO; 0.003 M CIO C. 0.8 M H2C2O4;0.8 M NaHC204 16. Which indicator would be the best for a titration of an hypolodous acid (HIO), Ka= 2 x 10-11 TABLE 16.1 Ranges of Color Changes for several Acid-Base Indicators 7 . . 10 11 12 Dywa Violet Thyme a. Crystal violet...
Pre-lab Questions for Experiment #8 (Experiment-20 in our lab manual) Titration of Acids and Bases 1)...
Pre-lab Questions for Experiment #8 (Experiment-20 in our lab manual) Titration of Acids and Bases 1) Fill in the blanks in the following figure that represents the setup of today's experiment N Y (6) (1)------- - (2) ---------- (3)---------- -------------- (4)---------- 17 (8) _----- --------------- (5) --------- TO --------------- 2) What is the purpose of using phenolphthalein for an acid-base titration? 3) What is the color of phenolphthalein indicator in: a) Acidic solution: _;b) Basic solution: 4) A 40.0 mL...
B. Acetic acid-Acetate with indicator. Color of solution initiallyColor after eadditions of solid: 3coo p Record...
B. Acetic acid-Acetate with indicator. Color of solution initiallyColor after eadditions of solid: 3coo p Record the relative shade of yellow, orange or red for each tube. Tube Experimental Control a. color Hot color Cold colo ranac- b. Write the aetie acid acetate epuibrium as the weak eid disiaon for acetic ecid. Label the color of each side(yellow or red) using the data from initial additions of the acetate; note that the acetate raises pH and lowers H' since the...
Below is a Ksp Table of many common hydroxides used frequently in chemistry. If you were...
Below is a Ksp Table of many common hydroxides used frequently in chemistry. If you were given a set of ions to convert to hydroxides, which 2 ions would be the easiest to separate? a) Cobalt and Iron b) Magnesium and Calcium c) Nickel and iron d) Cobalt and Calcium e) Copper and Zinc Circle the above pair and explain your reasoning: Al(OH)3 Cd(OH) Ca(OH)2 Cr(OH)3 CO(OH) 3 Co(OH)2 Cu(OH) 2 Fe(OH), Fe(OH) 2 Pb(OH)2 Mg(OH)2 Mn(OH) 2 Ni(OH) 2...
G-10 Assume the equilibrium constant K 1 for a reaction A + B 2 C. You...
G-10 Assume the equilibrium constant K 1 for a reaction A + B 2 C. You prepare a solution that has the following initial concentrations. For each solution, calculate the reaction quotient Q and state if the concentrations of reactants and products will (increase, decrease, or stay the same). a) [A] 1 M, [B] 1M, [C] 2 M. b) [A] 2 M, [B] 1 M,(C] 1 M. Answers: Q 4 >K, [A, B] increase, [C] decreases Q=0.5 < K, [A,...
Part A)
Part B)
Silver chromate is sparingly soluble in aqueous solutions. The Ksp of Ag, CrO, is 1.12 x 10-12 M'. What is the solubility (in moles per liter) of silver chromate in a 1.30 M potassium chromate aqueous solution? solubility: What is the solubility (in moles per liter) of silver chromate in a 1.30 M silver nitrate aqueous solution? solubility: M . What is the solubility (in moles per liter) of silver chromate in pure water? solubility: solubility:...
What indicator was used to monitor the pH change? Select one: a. thymolphthalein b. horseradish peroxidase c. bromothymol blue d. phenolphthalein
151-Experiment 7-12 2. (2 pts) Which reaction below illustrates complex formation? Circle the one correct answer. a) 2 AgNO3 (aq) + CaCl2 (aq) + 2 AgCl (s) + Ca(NO3)2 (aq) b) AgCl (s) + NaCl (aq) → Na[AgCl2] (aq) c) K3 [Fe(SCN)6] (aq) + K4(EDTA) (aq) → K[Fe(EDTA)](aq) + 6 KSCN (aq) d) [Fe(H2O)6](NO3)3 (aq) → [Fe(H2O)(OH)](NO3)2 (aq) + HNO3 (aq) e) 2 K4[Fe(CN)6] + Cl2 → 2 K3[Fe(CN)6] + 2 KC1
A chemist requires a solution of 2.00 M Fe2+ for an experiment. (The Ksp of Fe(OH)2 is 4.9x10-17) a) Will the precipitation of Fe(OH)2 (s) be an issue if the solution is prepared with pure water at 25°C? b) [1 pt] What might the chemist do to prepare this Fe2+ solution to the desired concentration?
15. Which mixture would be the best buffer? a. 1M HF; 0.01 MF d. 0.1 M HC2H2O2; 0.01 M C2H302 b. 2 M HCl; 0.5 MCI e. 0.003 M HCIO; 0.003 M CIO C. 0.8 M H2C2O4;0.8 M NaHC204 16. Which indicator would be the best for a titration of an hypolodous acid (HIO), Ka= 2 x 10-11 TABLE 16.1 Ranges of Color Changes for several Acid-Base Indicators 7 . . 10 11 12 Dywa Violet Thyme a. Crystal violet...
Pre-lab Questions for Experiment #8 (Experiment-20 in our lab manual) Titration of Acids and Bases 1) Fill in the blanks in the following figure that represents the setup of today's experiment N Y (6) (1)------- - (2) ---------- (3)---------- -------------- (4)---------- 17 (8) _----- --------------- (5) --------- TO --------------- 2) What is the purpose of using phenolphthalein for an acid-base titration? 3) What is the color of phenolphthalein indicator in: a) Acidic solution: _;b) Basic solution: 4) A 40.0 mL...
B. Acetic acid-Acetate with indicator. Color of solution initiallyColor after eadditions of solid: 3coo p Record the relative shade of yellow, orange or red for each tube. Tube Experimental Control a. color Hot color Cold colo ranac- b. Write the aetie acid acetate epuibrium as the weak eid disiaon for acetic ecid. Label the color of each side(yellow or red) using the data from initial additions of the acetate; note that the acetate raises pH and lowers H' since the...
Below is a Ksp Table of many common hydroxides used frequently in chemistry. If you were given a set of ions to convert to hydroxides, which 2 ions would be the easiest to separate? a) Cobalt and Iron b) Magnesium and Calcium c) Nickel and iron d) Cobalt and Calcium e) Copper and Zinc Circle the above pair and explain your reasoning: Al(OH)3 Cd(OH) Ca(OH)2 Cr(OH)3 CO(OH) 3 Co(OH)2 Cu(OH) 2 Fe(OH), Fe(OH) 2 Pb(OH)2 Mg(OH)2 Mn(OH) 2 Ni(OH) 2...
G-10 Assume the equilibrium constant K 1 for a reaction A + B 2 C. You prepare a solution that has the following initial concentrations. For each solution, calculate the reaction quotient Q and state if the concentrations of reactants and products will (increase, decrease, or stay the same). a) [A] 1 M, [B] 1M, [C] 2 M. b) [A] 2 M, [B] 1 M,(C] 1 M. Answers: Q 4 >K, [A, B] increase, [C] decreases Q=0.5 < K, [A,...
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