Exercise 1 - Questions
Question 1
Use your results to determine if the forward reaction in the potassium chromate/HCI reaction endothermic
or exothermic. Explain your answer, using the table below to help construct your thoughts.
Type of Change
Increase concentration of reactant
OR
Decrease concentration of product
Decrease concentration of reactant
OR
Increase concentration of product
Increase temperature of an exothermic reaction
Increase temperature of an endothermic reaction
Decrease temperature of an exothermic reaction
Decrease temperature of an endothermic reaction
Decrease pressure (gases only)
Increase pressure (gases only)
Chemical System Shift
(Right shifts toward product.
Left Shifts toward reactant.)
Right
Left
Left
Right
Right
Left
Toward the side with more gas
molecules
Toward the side with less gas
molecules
Question 2
$2CrO_4^{2-}(aq) + 2H^+(aq) \rightleftharpoons Cr_2O_7^{2-}(aq) + H_2O(l)$
Write the equation for the equilibrium constant (K) of the reaction studied in this exercise.
Question 3
Consider the chemical reaction: N$_2$ + 3H$_2$ yields 2NH$_3$. If the concentration of the reactant H$_2$ was increased
from 1.0 x 10$^{-2}$ M to 2.5 x 10$^{-1}$ M, calculate the reaction quotient (Q) and determine which way the chemical
system would shift by comparing the value of Q to K.