Question

13 Which of the statements below is true for the following reaction? 3H2S + 2 HNO3 --->3 5+2 NO. 4 H20 O a) oxygen is reduced b) hydrogen is reduced c) sulfur is oxidized d) hydrogen is oxidized e) no correct response 14 Consider the following reaction: CS2 (a) + 4 Hz (a) <====> CHA (@) . 2 H2S (a) Calculate the value of Ke If the equilibrium concentrations are [CS21 - 0140. Hal -0.250. [CH] = 0.0200, and (H2S) - 0.0400 a) 0.0585 by 17.1 c) 0.0229 d43.8 e) 0.280

Answer 1

13)

Oxidation state of H in reactant = +1

Oxidation state of H in product = +1

Oxidation state of S in reactant = -2

Oxidation state of S in product = 0

So, S is oxidised

Oxidation state of N in reactant = +5

Oxidation state of N in product = +2

So, N is reduced

Oxidation state of O in reactant = -2

Oxidation state of O in product = -2

Answer: c

14)

Kc is defined as concentration of product by concentration of reactant with each concentration term raised to power that is equal to its stoichiometric coefficient in balanced equation

So,

Kc = [CH4][H2S]^2 / [CS2][H2]^4

= (0.0200 * 0.0400^2) / (0.140 * 0.250^4)

= 0.0585

Answer: a