Consider the Haber process after equilibrium is reached. Which of the following

Question

Consider the Haber process after equilibrium is reached. Which of the following changes to the system would cause the reaction to "shift" towards the reactants in the forward direction? The hypothetical reaction AB + CD AC + BD is allowed to reach equilibrium at room temperature. At equilibrium, the concentrations of AB and CD are found to be [0.90] and [1.12], respectively. When the reaction is carried out at 50 degree C, the equilibrium concentrations of AB and CD are found to be [0.78] and [0.60], respectively. Is the reaction endothermic or exothermic? Any proton acceptor would be classified as an Arrhenius base The strength of acids is determined by their volatility (i.e., their boiling points) List three major reasons why the Bronsted-Lowry theory is a more complete acid base theory than the Arrhenius theory for applications to living systems. For the reaction H_2 + I_2 2HI at 425 degree C, the equilibrium concentrations are determined to be [0.0073] for each of the reactants and [0.0267] for the product. What is the value of the equilibrium constant (K_eq) for this reaction? The pH of an aqueous solution is 9.5. What is the [H_3 O^+] of this solution? The pH of an aqueous solution is 6.87. What is the [OH^-] of this solution?

Explanation / Answer

109

N2 + 3 H2 <---> 2NH3 this is exothermic

if you want it to shift to forward (i..e products)

a) is true, since reactants increaes, then products increases

b) true, since removing product will make reactants to make more products

c) true, similar to a

d) False, this shifts toward reactants

e)false, this shisfts toward reactants

f) this is true since some are also true

110)

At 25°C

[AB] = 0.90

[CD] = 1.12

at 50°C

[AB] = 0.78

[CD] = 0.60

Since increasing temperature makes reactants to decrease... then this must be endothermic, meaning it requires energy to react... adding more T makes reagents to form products

111)

TRUE, ahrrenius bases are, by definition, base acceptors (H+ )

112)

FALSE; the strong of acids is due to the equilibrium between the molecule and its ions; that is HA <-> H+ and A- equilibrium

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