Question

QUESTIONS 2C if more A is added; if more B is added; if 1. How is the equilibrium shifted in A+B some of C is removed from the reaction? 2. State Le Chatelier's Principle in clear terms. 3. When a system is at equilibrium, are any chemical reactions going on? NH + OH what would happen if 4. In the equilibrium reaction NH +H,O more ammonium salt were added? If HCI were added? forms under acid conditions, how would you explain any change 5. In our experiment, if Fe(SCN) seen when NaOH is added? 6. What evidence did you have that there was a shift in equilibrium when HCl was added to the satu- rated NaCl solution? 7. If you added NH CI to the equilibrium system of NaCl Na + which way, if any, does the equilibrium shift? How do you know?

Answer 1

1) The reaction is $\small A+B \leftrightarrow 2C$ , the Equilibrium constant, K can be expressed as,

  $\small K=\frac{[C] ^{2}}{[A][B]}$

If the reactants A and B is added more and product formed C is removed from the reaction site, According to Le chatelier principle, adding additional amount of reactants will shift the equilibrium to Right ​​​​​, towards the side of products.

And the removal of products from reaction sites, will shift equilibrium to right, also towards the products.

Therefore here the Equilibrium will shift towards right, product's side. It favours the formation of more product C.

2) Le chatelier principle is an observation about chemical equilibrium of a reaction. It states that the changes in temperature, pressure, volume or concentration of a system will result in predictable and opposing changes in results in order to achieve new equilibrium state. For example, as we saw in the previous question increase in reactants and decreasing of products in equilibrium reaction favours the equilibrium to shift in products side.

3) Equilibrium occurs when there is a constant ratio between concentration of reactants and products. It seems to be completed by looking the reaction at equilibrium. But actually the rate of forward reaction and backward reaction is same.

At equilibrium there is actually the chemical reaction taking place in same rate of forward and backward reaction.

4) According to Le chatelier principle, if the ammonium salt is added more, it favours backward reaction, in reactant's side.

If HCl added to the reaction, NH3 react with HCl to form the product NH4Cl, Ammonium chloride. It is a acid-base reaction.