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Determine if the following statements regarding buffers are True of False? HF would be a good choice for a buffer with a desired pH of 6.75 [1] HCN would be a good choice for a buffer with a desired pH of 9.50 [2] HC2Cl3O2 would be a good choice for a buffer with a desired pH of 13.75 [3] HIO would be a good choice for a buffer with a desired pH of 11.25 [4]

Consider a reaction with the following rate law rate = k [X]2 [Y] 3 [Z] 0.5 How many times will the rate of the reaction increase when the concentration of X is tripled (x3), Y is doubled (x2) and Z is quadrupled (x4)?

Determine the rate law for the reaction below. Experiment [Q2] (M) [J2] (M) Rate (M/s) 1 0.786 0.548 4.48 x 10-2 2 1.572 1.096 8.96 x 10-2 3 1.572 0.548 4.48 x 10-2 4 0.393 0.274 2.24 x 10-2

Which of the following statements is/are correct about the graph shown below?   The graph represents a strong acid/strong base titration The pH at the equivalence point in approximately 8.25 The pKa is approximately 8.25

Which of the following statements is/are true about graphs regarding rate data below? The half-life, t1/2, is independent of concentration Changing the concentration of A will not affect the rate of the reaction The units for the rate constant k are s-1

Determine if the following statements about the solubility of a gas are true or false.  The solubility of a gas increases as the strength of the intermolecular forces increases between the solute (gas) and the solvent. [1] The solubility of a gas decreases as temperature increases. [2] The solubility of a gas decreases as pressure increases. [3]

For the following reaction what is the rate of disappearance of X when the rate of appearance of Z is 6.75 x 10-3 M/s? 3X → 2Z + Q

Substance Q decays by 1st order kinetics and has a half-life of 45 s and a rate constant of 1.2 M/s. If Q is initially 0.88 M how much would remain after 5 half-lives?

X2 and Z2 react to give XZ X2 (g) +  Z2 (g) ⇌ 2XZ (g)    KC= 56.18 at 37°C If a 3.00 L flask initially contains 0.00258 mol each of X2 and Z2, find the equilibrium concentration of Z2 in the mixture at 37°C.  

What is the pH of a 1 L buffer solution containing 0.502 M diethylamine, (C2H5)NH, and 0.331 M diethylammonium bromide (C2H5)NH2Br?