The correct answer is option D, 0.009M
Concentration is defined as the amount of solute in a solution.
Noting the following points about concentration is helpful;
- The more the amount of solute present in a solution, the more concentrated the solution is.
- The lesser the amount of solute present in the solution, the lower the concentration of the solution.
A high numerical value of concentration indicates that there is a higher amount of solute in the solution while a lower value of concentration indicates that there is a lesser amount of solute in the solution.
Hence, a solution with lesser concentration is said to be dilute. If the solution has a concentration of 0.009M, then it is a dilute solution.
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