How many grams of sodium chloride will you add to 250.mL of water to make a
0.661 M solution?

The closer the atoms are to becoming ionic the more highly dense the negatively charged side gets.

In reversible reaction chemistry equilibrium is attained when the forward and reverse reactions are taking place at the same rate, thus, the concentrations of reactants and products remain the same. a reversible reaction is a chemical reaction where the reactants form products that, in turn, react together to give the reactants back. in irreversible reactions on the other hand, the reactants react to form the products, which cannot revert back into reactants.