Civil and Environmental Engineering Answers

Write the equilibrium expression for the reaction of zinc and HCl. 

Should the equilibrium expression change if the size of the Magnesium pieces changes? Why or why not?

Should the reaction rate change if the size of the Zn pieces changes? Why or why not?

When the concentration of HCl is increased, what happens to the reaction rate? Is this what you expected? Why or why not?

Write the balanced equation for H2O2 decomposition in the presence of MnO2. The products are water and oxygen gas.

What effect does MnO2 have on the reaction rate of the decomposition of hydrogen peroxide?

What effect does MnO2 have on the equilibrium constant?

a. Write the balanced equation for the reaction of zinc and HCl. b. Write the equilibrium expression for the reaction of zinc and HCl. Keq = c. Should the equilibrium expression change if the size of the pieces changes? Why or not? d. Should the reaction rate change if the size of the Zn pieces changes? Why or why not? e. When the concentration of HCl is increased, what happens to the reaction rate? Is this what you expected? Why or why not?

 Compute the mean annual precipitation for the watershed in the figure for Problem 2.3 using the arithmetic mean and the Thiessen polygon method. The gauge readings for gauges A-K, respectively, are: 28.1, 33.7. 25.6. 23.9. 24.6. 40.7. 41.3.37.2. 38.7. 41.1, and 29.3

 2.4. Compute the mean annual precipitation for the watershed in the figure for Problem 2.3 using the arithmetic mean and the Thiessen polygon method. The gauge readings for gauges A-K, respectively, are: 28.1, 33.7. 25.6. 23.9. 24.6. 40.7. 41.3.37.2. 38.7. 41.1, and 29.3