The pink and blue species below form a violet colored mixture at equilibrium: [co(h2o)6]2+ (aq) + 4 cl- (aq) -> [cocl4]2- (aq) + 6 h2o (l) (pink) (blue) if the concentration of [co(h2o)6]2+ is increased, what happens to the solution? a) the concentration of [cocl4]2- increases. b) the concentration of [cocl4]2- decreases. c) the solution becomes colorless. d) no color change is observed.

Option (A) is the correct answer.

Explanation:

According to Le Chatelier's principle, any disturbance caused in an equilibrium reaction will tend to shift the equilibrium in a direction away from the disturbance.

As the complex [Co(H_{2}O)_{6}]^{2+}[/tex] is present on the reactant side. So, when its concentration is increased then the equilibrium will shift in a direction that will oppose the change, that is, in the forward direction.

Therefore, it means that the product side will be favored. Hence, concentration of will be favored.

Thus, we can conclude that if the concentration of is increased then the concentration of increases.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.