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4. If you use 0.20 M KI instead of 0.10 M KI, how would this affect...
2. Why should the levels of water in the leveling bulb and buret be the same? 3. Why were you instructed to keep swirling the Erlenmeyer flask? 4. If you use 0.20 M KI instead of 0.10 M KI, how would this affect (a) the slopes of your curves, (b) the rate of the reactions, and (c) the numerical value of k for the reaction? 5. How did an increase in temperature affect the reaction rate? 6. Could you determine...
1) Which salt solution would have the lowest freezing point? a) 0.10 m FeCl, b) 0.20 m NaCl 20.20 m KNO d) 0.50 m CH NH 2) Which of the following 50 g sample of metal would require the most heat to go from 25°C to 100°C? a) iron b) copper c) lead d) they would all require the same amount of heat 3) The reaction A+B -> 2C has a K of 15.8. If the concentrations are currently [A]...
An electrochemical cell is expressed as Cu(s) | Cu^2+ (0.20 M) || I^- (0.10 M) | I_3^- (0.20 M) | Pt. I_3^- + 2e^- rightarrow 3I^-, E^0 = 0.535 V Cu^2+ + 2e^- rightarrow Cu(s) E^0 = 0.339 V Please answer the following questions: a. Write half-cell reactions at anode and at cathode. b. Write whole-cell reaction. c. Calculate the potential/voltage of the cell. d. Calculate equilibrium constant for this whole-cell reaction.
Find the mean of the following probability distribution? 1 0.20 2 0.10 3 0.35 4 0.05 5 0.30 Place your answer, rounded to two decimal places, in the blank. When entering your answer do not use any labels or symbols other than a decimal point. Simply provide the numerical value. For example, 1.23 would be a legitimate entry
2NO(g) + Br2(g) = 2NOBr(g) Experiment [NO-] (M) [Br2] (M) Initial Rate (M s-1) 1 0.10 0.20 24 2 0.25 0.20 150 3 0.10 0.50 60 4 0.35 0.50 735 1.) Determine the rate law equation for the reaction. 2.) What is the overall order of the reaction? 3.) What are the value and the units of the rate constant, k? 4.) Write the expression to show how is the rate of disappearance of bromine, Br2, related to the rate...
4) A 100.0 mL sample of 0.20 M HF is titrated with 0.10 M KOH. Determine the pH of the solution after the addition of 200.0 mL of KOH. The Ka of HF is 3.5 x 10-4. A) 10.54 B) 8.14 C) 9.62 D) 7.00 E) 3.46
What volume of a 3.00 M KI stock solution would you use to make 0.300 L of a 1.25 M KI solution?
d. (4 pts) Determine the pH of a buffer containing 0.10 M HF and 0.20 M F ions (2 pts) The buffer in (d) will resist a change in its pH upon addition of either acid or base. Do you think it will be BETTER (have a higher buffer capacity) at buffering additional acid or additional base? f. (2 pts) What is the [H] conc. of a 0.2 M sulfuric acid (H2SO4)? (underline one) <0.2 M 0.2M Between 0.2 and...
44 to 46 47. Which aqueous s (A) 0040 m gluo (C) 0020 m NaC 48. What is the rate law Experiment IGH 100 ml of ningen gas at the same p 0.10 A 0.20 M 0.10 M kis อเฟ possible to compare monatomic and diatomic gases (A) A) rate C,HOlB B) rate- C,LO JB (C rate 4C,HO 43. If an ideal gas occupies arolume of 100La:25.0°Cand D) rate HC,H,O a pressure of 1 .00 atm, what volume would it...
5 You have a solution of KI that is 0.480 M. How would you prepare 5.00 L of a solution that is 1.50x104 M in iodide ion? ? 10 0.0000000 O.Y8