A60.0 ml60.0 ml aliquot of a 1.80 m1.80 m solution is diluted to a total volume of 218 ml.218 ml. a 109 ml109 ml portion of that solution is diluted by adding 107 ml107 ml of water. what is the final concentration? assume the volumes are additive

The final concentration is 0.2497 M.

Explanation:

1. Molarity of the starting solution =

Volume of the starting solution =

After dilution of the solution to 219 mL.

Molarity of solution after dilution =

Volume of the new solution =

(Dilution law)

2. Now,109 mL of 0.495 M solution was diluted by 107 mL

Molarity of the solution =

Volume of the solution =

Molarity of solution after dilution =

Volume of the new solution(107 mL of water is added)  =

(Dilution law)

The final concentration is 0.2497 M.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.