Missing question:
KNO₃(s) + energy ⇄ K⁺(aq) + NO₃⁻(aq)
Which change causes the equilibrium to shift?
(1) increasing pressure .
(2) increasing temperature.
(3) adding a noble gas.
(4) adding a catalyst.
Answer is: (2) increasing temperature.
This is endothermic reaction, because heat is included as reactant.
According to Le
Chatelier's Principle, the position of equilibrium moves to counteract the
change, because heat (temperature) is increased, system consume that heat, so
equilibrium is shifted to right, by decreasing concentration of reactants and
increasing concentration of product.
