Question

1) Saturated Sodium Chloride Solution Equilibrium System: Observations upon addition ofHCI: white precipitate In which direction did this stress cause the equilibrium system to shif? Left or Right Which ion caused the shift? Explain. 2) Acidified Chromate Solution Equilibrium System: Observations upon addition ofHNO:: solution becomes orange Left or Right In which direction did this stress cause the equilibrium system to shift? Which ion caused the shift? Explain. Observations upon addition of NaOH: solution becomes yellow Left or Right In which direction did this stress cause the equilibrium system to shift? Which ion caused the shift? Explain.

PLEASE HELP ME! ASAP PLEASE!! If you need anymore information, please ask. This is what we were given and I am having trouble!

Answer 1

Hi there,

Remember the key point here is look at the color change after addition of reagent,

if the color belongs to reactant - then equilibrium shifted towards left side

if the color belongs to prodcut - then equilibrium shifted towards right side

Lechatlier's principle states that, equlibrium shifts

left side (reactant side) if we decrease concentration of reactants (or) increase concentration of products (or) remove one of the reactants or both.

right side (product side) if we decrease concentration of products (or) increase concentration of reactants (or) adding one of the reactants or both.

1) Saturated Sodium Chloride Solution Equilibrium System: Observations upon addition ofHCl: white precipitate In which direction did this stress cause the equilibrium system to shift? Left or Right Which ion caused the shift? Explain. Due to common ion effect, addition of Cl- from HCl to NaCl shifts the equilibrium towards reactants side and precipitated NaCl. This is most common method in industry. CI-1 2) Acidified Chromate Solution Equilibrium System: Observations upon addition ofHNO:: solution becomes orange In which direction did this stress cause the equilibrium system to shift? LA or Right Which ion caused the shift? Explain. Addition of one of the reactant increases its concentration and equilibrium shifts in opposite direction to counter balance the external perturbation. Hence equilibrium shifts towards right side (product side). H+1 Observations upon addition of NaOH: solution becomes yellow Left br Rit OH-1 In which direction did this stress cause the equilibrium system to shift? Which ion caused the shift? Explain Addition of OH 'ions neutralize h*lons, this means decreasing reactants concentration, hence equilibrium shifts towards reactants side to counter balance the stress applied on equilibrium position.

Hope this helped you!

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