Why equilibrium state is attainable from either way ?
Why at equilibrium state r reaction mixture does not contain 50% amount of reactants and 50% amount of products?

answer:• Define chemical equilibrium in terms of a reversible reaction. (Understanding);

• Write both the forward and the reverse reaction and describe the macroscopic

characteristics of each. (Applying);

• Define Law of Mass Action. (Understanding);

• Derive an expression for the equilibrium constant and its units. (Applying);

• State the necessary condition for the equilibrium and the ways that equilibrium can be

recognized. (Understanding) and

• Write the equilibrium constant expression of a reaction.

Explanation:

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

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