A2 Equilibrium

MrsSeymour
Quiz by MrsSeymour, updated more than 1 year ago
MrsSeymour
Created by MrsSeymour almost 6 years ago
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Description

A2 multiple choice test on equilibrium

Resource summary

Question 1

Question
What is the correct definition of dynamic equilibrium?
Answer
  • 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.

Question 2

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

Question 3

Question
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?
Answer
  • moldm-3
  • mol-1dm3
  • No unit

Question 4

Question
What is Kc?
Answer
  • Rate constant
  • Equilibrium constant
  • Reversible reaction constant

Question 5

Question
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)
Answer
  • 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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