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6) What is the aim of adding SnCl, in Fe determination? Write the related reaction. 7)...
5) Why should the medium be acidic in KMnO4 standardization? 6) What is the aim of...
5) Why should the medium be acidic in KMnO4 standardization? 6) What is the aim of adding SnCl, in Fe determination? Write the related reaction. 7) What are the function(s) of preventive solution? Explain. 8) Why an indirect method is applied for Ca' determination?
Suppose the galvanic cell sketched below is powered by the following reaction: Fe(s)+ SnCl ,(aq) -...
Suppose the galvanic cell sketched below is powered by the following reaction: Fe(s)+ SnCl ,(aq) - FeCl,(aq)+ Sn(s) E1 E2 S2 Write a balanced equation for the half-reaction that happens at the cathode of this cell. D-0 Write a balanced equation for the half-reaction that happens at the anode of this cell. Of what substance is El made? Of what substance is E2 made? What are the chemical species in solution S1? What are the chemical species in solution S27...
Pre-Lab for Determination of Solubility Product Constant 1. Write the solubility product constant (Ksp) for the...
Pre-Lab for Determination of Solubility Product Constant 1. Write the solubility product constant (Ksp) for the following reaction as a function of the concentrations of the products: Ca(103) (s) Ca²+ (aq) + 210,- (aq) 2. Ca(IO3)2 will ionize in water to produce 10, ions. The 10, ions will react with KI. Write the reaction for this reaction. 3. We will be using starch as an indicator. Why? 4. In this experiment, we will first produce Izby mixing calcium iodate with...
Fe(OH)3 <--> Fe3 + 3OH a) Write the appropriate equilibrium expression for the reaction. b) If...
Fe(OH)3 <--> Fe3 + 3OH a) Write the appropriate equilibrium expression for the reaction. b) If the equilibrium constant for this expression is 6 X 10^(-38), what is the concentration of iron in a solution at equilibrium with Fe(OH)3 (s). Assume no other sources if iron exist.
Lab Determination of a Rate Lavw Pre-Lab Questions 1. Determine the units of k for a...
Lab Determination of a Rate Lavw Pre-Lab Questions 1. Determine the units of k for a first order reaction by solving the rate expression for k, and then substituting time units in seconds and concentrations in moles/liter Repeat this determination for a second order reaction 2. If the S,O,- was omitted, would the blue-black color appear in the reaction mixtures? What is the reason for adding S,0,- in the determination of the rate of the reaction between I- and S...
Consider the reaction Sr(s) + FeOH+ (aq) + H3O+(aq) = Sr2+ (aq) + Fe(s) + 2H2O(l)....
Consider the reaction
Sr(s) + FeOH+ (aq) + H3O+(aq) = Sr2+ (aq) + Fe(s) + 2H2O(l).
Which of the following will result in a decrease in Sr2+
concentration?
tools excama.pdf * O 1.2 x 10-3M O 2.5 x 10-3 O 7.4 x 10-9 O 6.3 x 10-5 5. onsider the reaction Sr(s) + FeOH(aq) +H,O*(aq) — Sr+ (aq) + Fe(s) + 2H,000). Which of the following will result in a decrease in Sr? concentration? O Adding excess Fe(s). O Adding...
8. a) Write the balanced chemical equation for the solubility equilibrium of Fe(OH)3(s). (1 mark) Click...
8. a) Write the balanced chemical equation for the solubility equilibrium of Fe(OH)3(s). (1 mark) Click or tap here to enter text. b) Show why a solid formed when [Fe3+] = 1.0 x 10-4M and [OH-] = 1.0 x 10-M? Use values of Q and K to help illustrate. (3 marks) Click or tap here to enter text. c) What would be the effect of adding NaOH(aq) to this equilibrium? Explain in terms of LeChatelier's Principle how the equilibrium would...
The reaction is CH3COOH + C2H5OOH—->CH3COOC2H5 + H2O QUESTIONS: 1. What is/are the purpose(s) of adding HCl to the r...
The reaction is CH3COOH + C2H5OOH—->CH3COOC2H5 +
H2O
QUESTIONS: 1. What is/are the purpose(s) of adding HCl to the reaction mixture? 2. In this experiment, the moles of reactants and products, rather than their concentrations, are used to compute the equilibrium constant. Why does this work? Show calculations to support your answer. 3. Write an equilibrium constant expression for a hypothetical reaction, A + B = X + 2Y. Can you use the moles of reactants and products at equilibrium,...
DETERMINATION OF AN EQUILIBRIUM CONSTANT FOR A CHEMICAL REACTION Name TA Name (posted on A2L under...
DETERMINATION OF AN EQUILIBRIUM CONSTANT FOR A CHEMICAL REACTION Name TA Name (posted on A2L under "Grades") Lab Bench (posted on A2L under "Grades") Lab Room (posted on A2L under "Grades") Date Complete the following pre-lab questions before coming to lab. Your TA will collect this page at the start of your lab period. In your laboratory notebook, prepare the axes of your calibration graph for Part A. The graph should take up an entire page with a y-axis range...
8. For the general reaction 4A(aq) + 2B(s) = 3 Caa) a. Write the expression for...
8. For the general reaction 4A(aq) + 2B(s) = 3 Caa) a. Write the expression for the equilibrium constant. (3 pts) b. What is the effect on the equilibrium of adding B to the reaction? Explain why. (5 pts) 9. 25.00 mL of store-bought vinegar (acetic acid) was combined with phenolphthalein and titrated to a faint pink end point with 3.03 mL of 0.0915 M NaOH. What is the concentration of vinegar solution? The bottle claims it is 5% acetic...
5) Why should the medium be acidic in KMnO4 standardization? 6) What is the aim of adding SnCl, in Fe determination? Write the related reaction. 7) What are the function(s) of preventive solution? Explain. 8) Why an indirect method is applied for Ca' determination?
Suppose the galvanic cell sketched below is powered by the following reaction: Fe(s)+ SnCl ,(aq) - FeCl,(aq)+ Sn(s) E1 E2 S2 Write a balanced equation for the half-reaction that happens at the cathode of this cell. D-0 Write a balanced equation for the half-reaction that happens at the anode of this cell. Of what substance is El made? Of what substance is E2 made? What are the chemical species in solution S1? What are the chemical species in solution S27...
Pre-Lab for Determination of Solubility Product Constant 1. Write the solubility product constant (Ksp) for the following reaction as a function of the concentrations of the products: Ca(103) (s) Ca²+ (aq) + 210,- (aq) 2. Ca(IO3)2 will ionize in water to produce 10, ions. The 10, ions will react with KI. Write the reaction for this reaction. 3. We will be using starch as an indicator. Why? 4. In this experiment, we will first produce Izby mixing calcium iodate with...
Lab Determination of a Rate Lavw Pre-Lab Questions 1. Determine the units of k for a first order reaction by solving the rate expression for k, and then substituting time units in seconds and concentrations in moles/liter Repeat this determination for a second order reaction 2. If the S,O,- was omitted, would the blue-black color appear in the reaction mixtures? What is the reason for adding S,0,- in the determination of the rate of the reaction between I- and S...
Consider the reaction
Sr(s) + FeOH+ (aq) + H3O+(aq) = Sr2+ (aq) + Fe(s) + 2H2O(l).
Which of the following will result in a decrease in Sr2+
concentration?
tools excama.pdf * O 1.2 x 10-3M O 2.5 x 10-3 O 7.4 x 10-9 O 6.3 x 10-5 5. onsider the reaction Sr(s) + FeOH(aq) +H,O*(aq) — Sr+ (aq) + Fe(s) + 2H,000). Which of the following will result in a decrease in Sr? concentration? O Adding excess Fe(s). O Adding...
8. a) Write the balanced chemical equation for the solubility equilibrium of Fe(OH)3(s). (1 mark) Click or tap here to enter text. b) Show why a solid formed when [Fe3+] = 1.0 x 10-4M and [OH-] = 1.0 x 10-M? Use values of Q and K to help illustrate. (3 marks) Click or tap here to enter text. c) What would be the effect of adding NaOH(aq) to this equilibrium? Explain in terms of LeChatelier's Principle how the equilibrium would...
The reaction is CH3COOH + C2H5OOH—->CH3COOC2H5 +
H2O
QUESTIONS: 1. What is/are the purpose(s) of adding HCl to the reaction mixture? 2. In this experiment, the moles of reactants and products, rather than their concentrations, are used to compute the equilibrium constant. Why does this work? Show calculations to support your answer. 3. Write an equilibrium constant expression for a hypothetical reaction, A + B = X + 2Y. Can you use the moles of reactants and products at equilibrium,...
DETERMINATION OF AN EQUILIBRIUM CONSTANT FOR A CHEMICAL REACTION Name TA Name (posted on A2L under "Grades") Lab Bench (posted on A2L under "Grades") Lab Room (posted on A2L under "Grades") Date Complete the following pre-lab questions before coming to lab. Your TA will collect this page at the start of your lab period. In your laboratory notebook, prepare the axes of your calibration graph for Part A. The graph should take up an entire page with a y-axis range...
8. For the general reaction 4A(aq) + 2B(s) = 3 Caa) a. Write the expression for the equilibrium constant. (3 pts) b. What is the effect on the equilibrium of adding B to the reaction? Explain why. (5 pts) 9. 25.00 mL of store-bought vinegar (acetic acid) was combined with phenolphthalein and titrated to a faint pink end point with 3.03 mL of 0.0915 M NaOH. What is the concentration of vinegar solution? The bottle claims it is 5% acetic...
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