Dinitrogen pentoxide decomposes according to the reaction 2N2O5 (g) 4NO2(g) + O2(g) At 45°C the rate constant is 6.2 x 10 s The reaction is first order. a What is the rate law for the reaction? Rate = k[NO2] [O2] %3D O Rate = k[N2O5]*NO2]*[O2] O Rate = k[N2 05] %3D O Rate = k[N205] %3D

Determine the pH of each of the following solutions. (a) 0.296 M arsenous acid (weak acid with Ka = 5.1e-10). (b) 0.315 M boric acid (weak acid with Ka = 5.8e-10). (c) 0.571 M pyridine (weak base with Kb = 1.7e-09).

2-11 2.19] A solution has an H+ concentration of 10-5 M. (a) What is the pH of this solution? (b) What is the pOH (Assume that the temperature of the solution is 25°C.) Answer: (a) 5 (b) 9 BM

A brand of window-cleaning fluid is composed of ammonia solution, water, a colouring agent, and a very small quantity of soap. It has 0.15 mol/L concentration of NH3(aq). What is the pH of this fluid?

The solution of total volume 0.50 L was prepared by the addition of 0.10 moles of KF to sifficient water. What are the major species of the solution and pH ?

In the reaction, HSO (aq) + OH(aq) = pair 1 pair 2 SO42- (aq) + H₂O(, the conjugate acid-base pairs are

When the reversible reaction HC2H;O2 (aq) E> H(aq) + C2H3O2 (aq) is at equilibrium at room temperature, pH of the reaction mixture is 5. What will be the change in pH when you add a large amount of NaOH (aq) to the reaction mixture? a) pH will not change because NaOH is not a part of the reaction equation. b) pH will not change because acetic acid and NaOH form a buffer. c) pH will increase because NaOH will completely neutralize acetic acid. d) pH will decrease because NaOH will completely neutralize acetic acid. In the reversible reaction A (aq) + B(aq) E > C(aq), reactant A is very expensive. What are two ways to get it to react as fully as possible to form as much C as possible? a) remove C as it forms, and use an excess of A b) add another reactant that will form a precipitate with B c) remove C as it forms, and use an excess of B d) add another reactant that will form a precipitate with A

If the concentration of an acid in solution is 2.3 times larger than the concentration of its conjugate base, and the pH of the solution is 4.9, what is the pKa of the acid?

explain the cycle of acidic precipitation?

An environmental technician collects a sample of rainwater.Back in the lab, her pH meter isn’t working, so she uses indicatorsolutions to estimate the pH. A piece of litmus paper turns red,indicating acidity, so she divides the sample into thirds and ob-tains the following results: thymol blue turns yellow; bromphe-nol blue turns green; and methyl red turns red. Estimate the pHof the rainwater.