Question

if you disolve 2.00 mol KI in 1.00 L of water will you get a 2.00 M solution? explain please

Answer 1

molarity = moles/L of solution.
No, it will not be 2.00 M. Actually, it will be very close to 2.00 molal.
The definition of molarity is the number of moles divided by the liters OF SOLUTION. To prepare 2.00 M KI, one would dissolve 2.00 moles KI (weighed very accurately), place it in a 1.00 L volumetric flask, add enough water and swirl until all of the solid is dissolved, then make to a final volume of 1.00 L.

Adding 2.00 moles KI to 1 kg of water (1.00 L in most cases) will give you a final volume of a little more than 1.00 L. This is a 1.00 molal solution written as 1.00 m.