100cm' of 0.100mol dm3 potassium hydroxide is diluted by adding xcm' of water. The new concentration of the potassium hydroxide is 0.0800 mol dm? Which one of the following gives the value of x in cm??
A - 20
B - 25
C - 40
D - 80

The answer is c - the principal of original lateral continuity. 

Ibelieve the answer is d. bleachhope my answer has you : )

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.