At the freezing point , do the particles in an object have no kinetic energy ?

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

Can you me with this i really appreciate it