A2 Equilibrium

Descrição

A2 multiple choice test on equilibrium
MrsSeymour
Quiz por MrsSeymour, atualizado more than 1 year ago
MrsSeymour
Criado por MrsSeymour quase 9 anos atrás
150
8

Resumo de Recurso

Questão 1

Questão
What is the correct definition of dynamic equilibrium?
Responda
  • The forward reaction and backward reaction proceed at the same rate. The concentration of the reactants and products are the same.
  • The forward reaction and backward reaction proceed at the same rate. The concentration of the reactants and products remains constant.
  • The forward reaction and backward reaction proceed at an increased rate. The concentration of the reactants and products remains constant.

Questão 2

Questão
If the equilibrium expression is [A][B]2 / [C][D]3 (the number 2 and 3 are powers)... what would the equation be?
Responda
  • A + 2B < > C + 3D
  • A + 2B < > 3C + D
  • 2A + B < > 3C + D

Questão 3

Questão
If the powers on the top row of an expression are 2 and 2 and on the bottom row are 1 and 3, what would the unit for Kc be?
Responda
  • moldm-3
  • mol-1dm3
  • No unit

Questão 4

Questão
What is Kc?
Responda
  • Rate constant
  • Equilibrium constant
  • Reversible reaction constant

Questão 5

Questão
A 2.50 mol sample of NOCl was heated in a sealed container and equilibrium was established at a given temperature. The equilibrium mixture formed contained 0.80 mol of NO. What is the amount, in moles, of Cl2 and of NOCl in this equilibrium mixture? The equation is; 2NOCl(g) 2NO(g) + Cl2 (g)
Responda
  • Cl2 = 0.4 moles NOCl = 1.7 moles
  • Cl2 = 0.8 moles NOCl = 1.7 moles
  • Cl2 = 0.4 moles NOCl = 0.9 moles

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